Publications
Publications
Web of Science ResearcherID : ITV-3585-2023
A list of Yuta Notsu's publication in NASA/ADS (Astronomy Data System)
Ph. D. thesis "Observational studies on solar-type superflare stars" doi:10.14989/doctor.k21575 Kyoto Univ Repository
Referred Papers
Referred Papers
[62] "Origin of the stellar Fe Kα line clarified with FUV and X-ray observations of a superflare on the RS Canum Venaticorum-type Star UX Arietis"Shun Inoue, Wataru Buz Iwakiri, Tomoki Kimura, Teruaki Enoto, Yuta Notsu, Hiroyuki Uchida, Kenji Hamaguchi, Shin Toriumi, Atsushi Yamazaki, Fuminori Tsuchiya, Go Murakami, Kazuo Yoshioka, Zaven Arzoumanian, Keith Gendreau2026, ApJ in press arXiv:2512.09750
[61] "A 7 Day Multiwavelength Flare Campaign on AU Mic. IV: Quiescent Gyrosynchrotron and Gyroresonance Radiation from 12 to 25 GHz"Isaiah I. Tristan, Rachel A. Osten, Yuta Notsu, Adam F. Kowalski, Steven R. Cranmer2026, ApJ in press arXiv: 2512.03523
[60] "Eclipsing Stellar Flare on the Demon Star Algol Binary System Observed during the MAXI-NICER Follow-up Campaign in 2018"Kazuya Nakayama, Wataru Buz Iwakiri, Teruaki Enoto, Shun Inoue, Yuta Notsu, Keith Gendreau, Zaven Arzoumanian, Kenji Hamaguchi, Tatehiro Mihara2025, ApJ, 995 152, ADS DOI: 10.3847/1538-4357/ae1699 arXiv: 2510.14587 Press release in Japanese
[59] "A Seven-Day Multi-Wavelength Flare Campaign on AU Mic III: Quiescent and Flaring Properties of the X-ray Spectra and Chromospheric lines"Yuta Notsu, Isaiah I. Tristan, Rachel A. Osten, Alexander Brown, Adam F. Kowalski, Carol A. Grady2025, ApJ, 993, 212 ADS DOI: 10.3847/1538-4357/ae0578 arXiv:2509.06908
[58] "Do Young Suns Produce Frequent, Massive CMEs? Results from Five-year Dedicated Optical Observations of EK Draconis and V889 Hercules"Kosuke Namekata, Hiroyuki Maehara, Yuta Notsu, Satoshi Honda, Kai Ikuta, Daisaku Nogami, and Kazunari Shibata2025, ApJ, 993, 80 ADS doi: 10.3847/1538-4357/adfe70 arXiv: 2510.22111
[57] "Discovery of multi-temperature coronal mass ejection signatures from a young solar analogue" Kosuke Namekata, Kevin France, Jongchul Chae, Vladimir S. Airapetian, Adam Kowalski, Yuta Notsu, Peter R. Young, Satoshi Honda, Soosang Kang, Juhyung Kang, Kyeore Lee, Hiroyuki Maehara, Kyoung-Sun Lee, Cole Tamburri, Tomohito Ohshima, Masaki Takayama & Kazunari Shibata 2025, Nature Astronomy, ADS doi: 10.1038/s41550-025-02691-8 arXiv: 2510.22110
Press release: Coronal mass ejections at the dawn of the solar system 若い惑星環境を揺るがす巨⼤フレアからの多温度のガス噴出―ハッブル宇宙望遠鏡と⽇韓地上望遠鏡で同時に検出―
[56] "Unveiling Unprecedented Fine Structure in Coronal Flare Loops with the DKIST"Cole A. Tamburri, Maria D. Kazachenko, Gianna Cauzzi, Adam F. Kowalski, Ryan French, Rahul Yadav, Caroline L Evans, Yuta Notsu, Marcel F. Corchado-Albelo, Kevin P. Reardon, Alexandra Tritschler2025, ApJL, 990, L3 ADS doi: 10.3847/2041-8213/adf95e arXiv: 2508.05875Press release from NSO The NSF Inouye Solar Telescope Delivers Record-Breaking Images of Solar Flare, Coronal Loops
[55] "A Semi-Empirical Estimate of Solar EUV Evolution from 10 Myr to 10 Gyr"Kevin France (University of Colorado), Girish Duvvuri (Vanderbilt), Cynthia Froning (SwRI), Alexander Brown (University of Colorado), P. Christian Schneider (Christian-Albrects University), J. Sebastian Pineda (University of Colorado), David Wilson (University of Colorado), Allison Youngblood (NASA/GSFC), Vladimir Airapetian (NASA/GSFC), Kosuke Namekata (NASA/GSFC, Kyoto University), Yuta Notsu (University of Colorado), Tristen Sextro (Penn State University)2025, AJ, 170, 159 ADS doi: 10.3847/1538-3881/adefdf arXiv: 2507.15953
[54] "Time evolution of white-light flare accompanied by probable postflare loops on M-type dwarf EV Lacertae" Shinnosuke Ichihara, Daisaku Nogami, Kosuke Namekata , Hiroyuki Maehara, Yuta Notsu, Kai Ikuta, Satoshi Honda, Takato Otsu, Kazunari Shibata
2025, PASJ, 77, 1025 ADS doi: 10.1093/pasj/psaf080 arXiv: 2507.03242
[53] "Systematic NICER study of the low-ionized Fe Kα line on RS Canum Venaticorum type stars"Shun Inoue, Teruaki Enoto, Yuta Notsu, Hiroyuki Uchida, Wataru Buz Iwakiri, Kosuke Namekata, Keith Gendreau
2025, MNRAS, 541, 1403 ADS doi:10.1093/mnras/staf1048 arXiv: 2506.21040
[52] "A 7-Day Multi-Wavelength Flare Campaign on AU Mic. II: Electron Densities and Kinetic Energies from High-Frequency Radio Flares"Isaiah I. Tristan, Rachel A. Osten, Yuta Notsu, Adam F. Kowalski, Alexander Brown, Graeme L. White, Carol A. Grady, Todd J. Henry, Eliot Halley Vrijmoet2025, ApJ, 986, 53 ADS doi:10.3847/1538-4357/adc565 arXiv: 2503.14624
[51] "High-Time-Cadence Spectroscopy and Photometry of Stellar Flares on M-dwarf YZ Canis Minoris with Seimei Telescope and TESS. II. Statistical Properties of Blue/Red Asymmetries in the Hα Line"Yuto Kajikiya, Kosuke Namekata, Yuta Notsu, Kai Ikuta, Hiroyuki Maehara, Bunei Sato, Daisaku Nogami2025, ApJ, 985, 136 ADS DOI: 10.3847/1538-4357/adce7d arXiv: 2504.12645
[50] "High-Time-Cadence Spectroscopy and Photometry of Stellar Flares on M-dwarf YZ Canis Minoris with Seimei Telescope and TESS. I. Discovery of Rapid and Short-Duration Prominence Eruptions"Yuto Kajikiya, Kosuke Namekata, Yuta Notsu, Hiroyuki Maehara, Bunei Sato, Daisaku Nogami2025, ApJ, 979, 93 ADS doi: https://iopscience.iop.org/article/10.3847/1538-4357/ad91b9 arXiv:2411.08462
[49] "Rising Near-Ultraviolet Spectra in Stellar Megaflares"Adam F. Kowalski, Rachel A. Osten, Yuta Notsu, Isaiah I. Tristan, Antigona Segura, Hiroyuki Maehara, Kosuke Namekata, Shun Inoue 2025, ApJ, 978, 81 ADS doi: 10.3847/1538-4357/ad9395 arXiv:2411.07913
[48]"Sun-like stars produce superflares roughly once per century"Valeriy Vasilyev, Timo Reinhold, Alexander I. Shapiro, Ilya Usoskin, Natalie A. Krivova, Hiroyuki Maehara, Yuta Notsu, Allan Sacha Brun, Sami K. Solanki, Laurent Gizon2024, Science, Vol 386, Issue 6727, pp. 1301-1305 ADS DOI:10.1126/science.adl5441 arXiv:2412.12265 Press release at Max Planck Institute: Superflares once per Century This paper is featured by news articles (e.g., New York Times "Superflares Erupt From Stars Like Our Sun Once Every 100 Years"). 日本語研究紹介(国立天文台岡山分室Webpage)🇯🇵
[47] "A long-duration superflare on the K giant HD 251108"Hans Moritz Günther, Dheeraj Pasham, Alexander Binks, Stefan Czesla, Teruaki Enoto, Michael Fausnaugh, Franz-Josef Hambsch, Shun Inoue, Hiroyuki Maehara, Yuta Notsu, Jan Robrade, J. H. M. M. Schmitt, P. C. Schneider2024, ApJ, 977, 6 ADS doi:10.3847/1538-4357/ad8b2c arXiv:2410.03616 [46]"Multiwavelength Campaign Observations of a Young Solar-type Star, EK Draconis. II. Understanding Prominence Eruption through Data-Driven Modeling and Observed Magnetic Environment"Kosuke Namekata, Kai Ikuta, Pascal Petit, Vladimir S. Airapetian, Aline A. Vidotto, Petr Heinzel, Jiří Wollmann, Hiroyuki Maehara, Yuta Notsu, Shun Inoue, Stephen Marsden, Julien Morin, Sandra V. Jeffers, Coralie Neiner, Rishi R. Paudel, Antoaneta A. Avramova-Boncheva, Keith Gendreau, Kazunari Shibata2024, ApJ, 976, 25 ADS doi:10.3847/1538-4357/ad85df arXiv:2410.05523
[45]"High-velocity blue-shifted Fe XXV Heα line during a superflare of the RS CVn-type star IM Peg"Shun Inoue, Wataru Buz Iwakiri, Teruaki Enoto, Hiroyuki Uchida, Miki Kurihara, Masahiro Tsujimoto, Yuta Notsu, Kenji Hamaguchi, Keith Gendreau, Zaven Arzoumanian, Takeshi Go Tsuru2024, ApJL, 969, L12 ADS doi: 10.3847/2041-8213/ad5667 arXiv: 2406.06940
[44]"JASMINE: Near-Infrared Astrometry and Time Series Photometry Science"Daisuke Kawata, Hajime Kawahara, Naoteru Gouda, et al. (including Yuta Notsu)2024, PASJ, 76, 386 ADS doi:10.1093/pasj/psae020 arXiv: 2307.05666
[43] "Multiwavelength observation of an active M-dwarf star EV Lac and its stellar flare accompanied by a delayed prominence eruption"Shun Inoue, Teruaki Enoto, Kosuke Namekata, Yuta Notsu, Satoshi Honda, Hiroyuki Maehara, Jiale Zhang, Hong-Peng Lu, Hiroyuki Uchida, Takeshi Go Tsuru, Daisaku Nogami, Kazunari Shibata2024, PASJ, 76, 175 ADS doi: 10.1093/pasj/psae001 arXiv:2401.00399
[42] "Magnetic activity variability of nearby bright Sun-like stars by 4-year intensive Hα line monitoring"Sanghee Lee, Yuta Notsu, Bun'ei Sato2024, PASJ, 76, 27 ADS doi:10.1093/pasj/psad077 arXiv: 2310.19265
[41]"Apache Point Observatory (APO)/SMARTS Flare Star Campaign Observations. I. Blue Wing Asymmetries in Chromospheric Lines during Mid-M-Dwarf Flares from Simultaneous Spectroscopic and Photometric Observation Data"Yuta Notsu, Adam F. Kowalski, Hiroyuki Maehara, Kosuke Namekata, Kenji Hamaguchi, Teruaki Enoto, Isaiah I. Tristan, Suzanne L. Hawley, James R. A. Davenport, Satoshi Honda, Kai Ikuta, Shun Inoue, Keiichi Namizaki, Daisaku Nogami, Kazunari Shibata2024, ApJ, 961, 189 ADS DOI: 10.3847/1538-4357/ad062f arXiv: 2310.02450
[40] "Multi-wavelength Campaign Observations of a Young Solar-type Star, EK Draconis I. Discovery of Prominence Eruptions Associated with Superflares"Kosuke Namekata, Vladimir S. Airapetian, Pascal Petit, Hiroyuki Maehara, Kai Ikuta, Shun Inoue, Yuta Notsu, Rishi R. Paudel, Zaven Arzoumanian, Antoaneta A. Avramova-Boncheva, Keith Gendreau, Sandra V. Jeffers, Stephen Marsden, Julien Morin, Coralie Neiner, Aline A. Vidotto, Kazunari Shibata2024, ApJ, 961, 23 ADS DOI: 10.3847/1538-4357/ad0b7c arXiv: 2311.07380
[39] "Extreme Solar Events: Setting up a Paradigm"Ilya Usoskin, Fusa Miyake, Melanie Baroni, Nicolas Brehm, Silvia Dalla, Hisashi Hayakawa, Hugh Hudson, A. J. Timothy Jull, Delores Knipp, Sergey Koldobskiy, Hiroyuki Maehara, Florian Mekhaldi, Yuta Notsu, Stepan Poluianov, Eugene Rozanov, Alexander Shapiro, Tobias Spiegl, Timofei Sukhodolov, Joonas Uusitalo & Lukas Wacker 2023, Space Sci Rev, 219, 73 ADS DOI: 10.1007/s11214-023-01018-1This review is based on our joint work of the International Space Science Institute (ISSI) team #510 (2020–2022)
[38]"Magnitude Estimates for the Carrington Flare in 1859 September: As Seen from the Original Records"Hisashi Hayakawa; Sabrina Bechet; Frédéric Clette; Hugh S. Hudson; Hiroyuki Maehara; Kosuke Namekata; Yuta Notsu2023, ApJL, 954, L3 ADS DOI: 10.3847/2041-8213/acd853
[37]"A Seven-Day Multi-Wavelength Flare Campaign on AU Mic I: High-Time Resolution Light Curves and the Thermal Empirical Neupert Effect"Isaiah I. Tristan, Yuta Notsu, Adam F. Kowalski, Alexander Brown, John P. Wisniewski, Rachel A. Osten, Eliot H. Vrijmoet, Graeme L. White, Brad D. Carter, Carol A. Grady, Todd J. Henry, Rodrigo H. Hinojosa, Jamie R. Lomax, James E. Neff, Leonardo A. Paredes, Jack Soutter2023, ApJ, 951, 33 ADS DOI: 10.3847/1538-4357/acc94f arXiv:2304.05692
[36] "Starspot mapping with adaptive parallel tempering. II. Application to TESS data for M-dwarf flare stars, AU Microscopii, YZ Canis Minoris, and EV Lacertae"Kai Ikuta, Kosuke Namekata, Yuta Notsu, Hiroyuki Maehara, Soshi Okamoto, Satoshi Honda, Daisaku Nogami, Kazunari Shibata2023, ApJ, 948, 64 ADS doi:10.3847/1538-4357/acbd36 arXiv:2302.09249
[35] "Detection of a high-velocity prominence eruption leading to a CME associated with a superflare on the RS CVn-type star V1355 Orionis"Shun Inoue, Hiroyuki Maehara, Yuta Notsu, Kosuke Namekata, Satoshi Honda, Keiichi Namizaki, Daisaku Nogami, Kazunari Shibata2023, ApJ, 948, 9 ADS doi: 10.3847/1538-4357/acb7e8 arXiv:2301.13453Press releases: (English) "Superflare with Massive, High-Velocity Prominence Eruption "(NAOJ), Superflare with Massive, High-Velocity Prominence Eruption (Kyoto Univ)(日本語🇯🇵)「史上最大質量の超高速恒星プロミネンス噴出―せいめい望遠鏡が捉えた極限宇宙天気現象― 」(京都大学), 「恒星のスーパーフレアに伴う、超高速プロミネンスの噴出を検出 」(国立天文台), 「恒星のスーパーフレアに伴う、超高速プロミネンスの噴出を検出 」(国立天文台岡山分室)
[34] "Magnetic activity variability from Hα line intensive monitoring for two F-type stars having a hot-Jupiter, τ Bootis A and υ Andromedae A"Sanghee Lee, Yuta Notsu, Bun'ei Sato2023, PASJ, 75, 446 ADS doi:10.1093/pasj/psad010 arXiv: 2302.02135
[33] "Reconstructing the XUV Spectra of Active Sun-like Stars Using Solar Scaling Relations with Magnetic Flux"Kosuke Namekata, Shin Toriumi, Vladimir S. Airapetian, Munehito Shoda, Kyoko Watanabe, Yuta Notsu2023, ApJ, 945, 147 ADS doi:10.3847/1538-4357/acbe38 arXiv:2302.10376
[32] "A Superflare on YZ Canis Minoris Observed by Seimei Telescope and TESS: Red Asymmetry of Hα Emission Associated with White-Light Emission"Keiichi Namizaki, Kosuke Namekata, Hiroyuki Maehara, Yuta Notsu, Satoshi Honda, Daisaku Nogami, Kazunari Shibata2023, ApJ, 945,61 ADS doi: 10.3847/1538-4357/acb928 arXiv:2302.03007 Featured at astrobites "Asymmetries are red, violets are blue, superflares are seen in white light, and H-alpha too!"
[31]"Universal Scaling Laws for Solar and Stellar Atmospheric Heating: Catalog of Power-law Index between Solar Activity Proxies and Various Spectral Irradiances"Shin Toriumi, Vladimir S. Airapetian, Kosuke Namekata, Yuta Notsu2022, ApJS, 262, 46 ADS doi:10.3847/1538-4365/ac8b15 arXiv:2208.10511
[30]"Discovery of a Long-Duration Superflare on a Young Solar-Type Star EK Draconis with Nearly Similar Time Evolution for Hα and White-Light Emissions"Kosuke Namekata, Hiroyuki Maehara, Satoshi Honda, Yuta Notsu, Soshi Okamoto, Jun Takahashi, Masaki Takayama, Tomohito Ohshima, Tomoki Saito, Noriyuki Katoh, Miyako Tozuka, Katsuhiro L. Murata, Futa Ogawa, Masafumi Niwano, Ryo Adachi, Motoki Oeda, Kazuki Shiraishi, Keisuke Isogai, Daisaku Nogami, Kazunari Shibata2022, ApJL, 926, L5 ADS doi: 10.3847/2041-8213/ac4df0 arXiv:2201.09416
[29]"Probable detection of an eruptive filament from a superflare on a solar-type star" Kosuke Namekata, Hiroyuki Maehara, Satoshi Honda, Yuta Notsu, Soshi Okamoto, Jun Takahashi, Masaki Takayama, Tomohito Ohshima, Tomoki Saito, Noriyuki Katoh, Miyako Tozuka, Katsuhiro L. Murata, Futa Ogawa, Masafumi Niwano, Ryo Adachi, Motoki Oeda, Kazuki Shiraishi, Keisuke Isogai, Daikichi Seki, Takako T. Ishii, Kiyoshi Ichimoto, Daisaku Nogami & Kazunari Shibata 2022, Nature Astronomy, 6, 241-248 (Published online on 09 December 2021, Open Access) ADS doi:10.1038/s41550-021-01532-8 arXiv:2112.04808 (Article Metrics)
Nature Research Highlight: "Young star’s streamer of scorching-hot gas gives astronomers a fiery first" Press release: CU Boulder: 🇺🇸 "A young, sun-like star may hold warnings for life on Earth" NSO blog: 🇺🇸 "Researchers Observe Massive CME on Distant, Sun-Like Star" NAOJ: 🇯🇵 「太陽型星のスーパーフレアから噴出する巨大フィラメントを初検出 —昔の、そして今の惑星環境や文明に与える脅威— 」
[28]"Time-resolved spectroscopy and photometry of an M dwarf flare star YZ Canis Minoris with OISTER and TESS: Blue asymmetry in Hα line during the non-white light flare"Hiroyuki Maehara, Yuta Notsu, Kousuke Namekata, Satoshi Honda, Adam F. Kowalski, Noriyuki Katoh, Tomohito Ohshima, Kota Iida, Motoki Oeda, Katsuhiro L. Murata, Masayuki Yamanaka, Kengo Takagi, Mahito Sasada, Hiroshi Akitaya, Kai Ikuta, Soshi Okamoto, Daisaku Nogami, Kazunari Shibata2021, PASJ, 73, 44 ADS doi: 10.1093/pasj/psaa098 arXiv:2009.14412
[27]"Statistical Properties of Superflares on Solar-type Stars: Results Using All of the Kepler Primary Mission Data"Soshi Okamoto, Yuta Notsu, Hiroyuki Maehara, Kosuke Namekata, Satoshi Honda, Kai Ikuta, Daisaku Nogami, Kazunari Shibata2021, ApJ, 906, 72 ADS doi: 10.3847/1538-4357/abc8f5 arXiv:2011.02117
[26]"Starspot mapping with adaptive parallel tempering I: Implementation of computational code"Kai Ikuta, Hiroyuki Maehara, Yuta Notsu, Kosuke Namekata, Taichi Kato, Shota Notsu, Soshi Okamoto, Satoshi Honda, Daisaku Nogami, Kazunari Shibata2020, ApJ, 902, 73 ADS doi:10.3847/1538-4357/abae5f arXiv:2008.05478
[25] "Optical and X-ray observations of stellar flares on an active M dwarf AD Leonis with Seimei Telescope, SCAT, NICER and OISTER"Kosuke Namekata, Hiroyuki Maehara, Ryo Sasaki, Hiroki Kawai, Yuta Notsu, Adam F. Kowalski, Joel C. Allred, Wataru Iwakiri, Yoko Tsuboi, Katsuhiro L. Murata, Masafumi Niwano, Kazuki Shiraishi, Ryo Adachi, Kota Iida, Motoki Oeda, Satoshi Honda, Miyako Tozuka, Noriyuki Katoh, Hiroki Onozato, Soshi Okamoto, Keisuke Isogai, Mariko Kimura, 4, Naoto Kojiguchi, Yasuyuki Wakamatsu, Yusuke Tampo, Daisaku Nogami, and Kazunari Shibata2020, PASJ, 72, 68 ADS doi:10.1093/pasj/psaa051 arXiv:2005.04336 Press release: Kyoto Univ (Japanese) NAOJ(Japanese) Kyoto Univ (English) NAOJ(English)
[24] "The Extreme Space Weather Event in 1903 October/November: An Outburst from the Quiet Sun"Hisashi Hayakawa, Paulo Ribeiro, José M. Vaquero, María Cruz Gallego, Delores J. Knipp, Florian Mekhaldi, Ankush Bhaskar, Denny M. Oliveira, Yuta Notsu, Víctor M. S. Carrasco, Ana Caccavari, Bhaskara Veenadhari, Shyamoli Mukherjee, Yusuke Ebihara2020, ApJL, 897, L10 ADS doi:10.3847/2041-8213/ab6a18 arXiv:2001.04575
[23]"Impact of Space Weather on Climate and Habitability of Terrestrial Type Exoplanets"V.S. Airapetian, R. Barnes, O. Cohen, G.A. Collinson, W.C. Danchi, C.F. Dong, A.D. Del Genio, K. France, K. Garcia-Sage, A. Glocer, N. Gopalswamy, J.L. Grenfell, G. Gronoff, M. G"udel, K. Herbst, W.G. Henning, C.H. Jackman, M. Jin, C.P. Johnstone, L. Kaltenegger, C.D. Kay, K. Kobayashi, W. Kuang, G. Li, B.J. Lynch, T. L"uftinger, TJ.G. Luhmann, H. Maehara, M.G. Mlynczak, Y. Notsu, R.M. Ramirez, S. Rugheimer, M. Scheucher, J.E. Schlieder, K. Shibata, C. Sousa-Silva, V. Stamenkovi'c, R.J. Strangeway, A.V. Usmanov, P. Vergados, O.P. Verkhoglyadova, A.A. Vidotto, M. Voytek, M.J. Way, G.P. Zank, Y. Yamashiki2020, International Journal of Astrobiology, 19, 136 ADS doi:10.1017/S1473550419000132 arXiv:1905.05093
[22] "Cost estimation for alternative aviation plans against potential radiation exposure associated with solar proton events for the airline industry"Yosuke A. Yamashiki, Moe Fujita, Tatsuhiko Sato, Hiroyuki Maehara, Yuta Notsu, & Kazunari Shibata 2020, Evolut Inst Econ Rev doi:10.1007/s40844-020-00163-4 arXiv:2004.10869
[21] "Temporal Evolution of Spatially-Resolved Individual Star Spots on a Planet-Hosting Solar-type Star: Kepler 17"Kosuke Namekata, James R. A. Davenport, Brett M. Morris, Suzanne L. Hawley, Hiroyuki Maehara, Yuta Notsu, Shin Toriumi, Kai Ikuta, Shota Notsu, Satoshi Honda, Daisaku Nogami, and Kazunari Shibata2020, ApJ, 891, 103 ADS doi:10.3847/1538-4357/ab7384 arXiv:2002.01086
[20]"A Blueprint of State-of-the-art Techniques for Detecting Quasi-periodic Pulsations in Solar and Stellar Flares"Anne-Marie Broomhall, James R. A. Davenport, Laura A. Hayes, Andrew R. Inglis, Dmitrii Y. Kolotkov, James A. McLaughlin, Tishtrya Mehta, Valery M. Nakariakov, Yuta Notsu, David J. Pascoe, Chloe E. Pugh, and Tom Van Doorsselaere2019, ApJS, 244, 44 ADS doi:10.3847/1538-4365/ab40b3 arXiv:1910.08458
[19]"Impact of Stellar Superflares on Planetary Habitability"Yosuke A. Yamashiki, Hiroyuki Maehara, Vladimir Airapetian, Yuta Notsu, Tatsuhiko Sato, Shota Notsu, Ryusuke Kuroki, Keiya Murashima, Hiroaki Sato, Kosuke Namekata, Takanori Sasaki, Thomas B. Scott, Hina Bando, Subaru Nashimoto, Fuka Takagi, Cassandra Ling, Daisaku Nogami, Kazunari Shibata2019, ApJ, 881, 114 ADS doi: 10.3847/1538-4357/ab2a71 arXiv:1906.06797 Press Release: Kyoto Univ (Japanese) (JAEA Webpage (Japanese) , 国立天文台 Webpage (Japanese))
[18]"Unaided-eye Sunspot Observations in 1769 November: A Comparison of Graphical Records in the East and the West"Hisashi Hayakawa, David M. Willis, Kentaro Hattori, Yuta Notsu, Matthew N. Wild, Christoffer Karoff2019, Solar Physics, 294, 95 ADS doi: 10.1007/s11207-019-1488-5
[17]" Do Kepler superflare stars really include slowly-rotating Sun-like stars ? - Results using APO 3.5m telescope spectroscopic observations and Gaia-DR2 data - " Yuta Notsu, Hiroyuki Maehara, Satoshi Honda, Suzanne L. Hawley, James R. A. Davenport, Kosuke Namekata, Shota Notsu, Kai Ikuta, Daisaku Nogami, Kazunari Shibata2019, ApJ 876 58 ADS doi: 10.3847/1538-4357/ab14e6 arXiv:1904.00142
Press Release: CU Boulder LASP@CU AAS KyotoUniv(Japanese) Recording of Press conference at AAS 234 (Youtube): "AAS 234 Press Conference: Exoplanets & Flare Stars"
[16]"arcesetc: ARC Echelle Spectrograph Exposure Time Calculator" Brett M. Morris, Trevor Dorn-Wallenstein, Emily M. Levesque, Charli Sakari, Doug Gies, Katherine Lester, Yuta Notsu, Allison Youngblood, and Russet McMillan 2019, Journal of Open Source Software, 4(34), 1130, ADS doi: 10.21105/joss.01130
[15]" Lifetimes and Emergence/Decay Rates of Star Spots on Solar-type Stars Estimated by Kepler Data in Comparison with Those of Sunspots"Namekata, K., Maehara, H., Notsu, Y., Toriumi, S., Hayakawa, H., Ikuta, K., Notsu, S., Honda, S., Nogami, D., & Shibata, K. 2019, ApJ, 871, 187 ADS doi: 10.3847/1538-4357/aaf471 arXiv:1811.10782
[14]"Time-resolved spectroscopic observations of an M-dwarf flare star EV Lacertae during a flare"Honda, S., Notsu, Y., Namekata, K., Notsu, S., Maehara, H., Ikuta, K., Nogami, D., & Shibata, K. 2018, PASJ, 70, 62, ADS doi:10.1093/pasj/psy055 arXiv:1804.03771
[13]"Statistical Studies of Solar White-Light Flares and Comparisons with Superflares on Solar-type Stars"Namekata, K., Sakaue, T., Watanabe, K., Asai, A., Maehara, H., Notsu, Y., Notsu, S., Honda, S., Ishii, T. T., Ikuta, K., Nogami, D., & Shibata, K. ApJ, 2017, 851, 2 ADS, doi: 10.3847/1538-4357/aa9b34 arXiv:1710.11325
[12]"Starspot activity and superflares on solar-type stars"Maehara, H., Notsu, Y., Notsu, S., Namekata, K., Honda, S., Ishii, T. T., Nogami, D., & Shibata, K.PASJ, 2017, 69 (3), 41 (First published online on 12 April 2017) ADS doi: 10.1093/pasj/psx013 arXiv:1702.07141
[11]"Spectroscopic observations of active solar-analog stars having high X-ray luminosity, as a proxy of superflare stars"Notsu, Y., Honda, S., Maehara, H., Notsu, S., Namekata, K., Nogami, D., & Shibata, K.PASJ, 2017, 69 (1), 12, (First published online January 24, 2017) ADS doi: 10.1093/pasj/psw116 arXiv:1611.03659
[10]"High Dispersion Spectroscopy of Solar-type Superflare Stars. III. Lithium Abundances"Honda, S., Notsu, Y., Maehara, H., Notsu, S., Shibayama, T., Nogami, D., & Shibata, K.PASJ, 2015, 67 (5), 85 (First published online July 7, 2015) ADS doi: 10.1093/pasj/psv054 arXiv:1505.06050
[9]"High dispersion spectroscopy of solar-type superflare stars. II. Stellar rotation, starspots, and chromospheric activities "Notsu, Y., Honda, S., Maehara, H., Notsu, S., Shibayama, T., Nogami, D., & Shibata, K.PASJ, 2015, 67 (3), 33, (First published online March 29, 2015) ADS doi: 10.1093/pasj/psv002 arXiv:1412.8245
Press Release (May 12th (JST), 2015): Subaru Telescope Observers Superflare Stars with Large Starspots RHESSI Science Nugget No. 254 (Author: Yuta Notsu) "May 18 - 24, 2015 Stargazer: Superflares On Stars"(Hawaii Public Radio)
「すばる望遠鏡で迫るスーパーフレア星の正体」 すばる望遠鏡HPの解説記事(日本語) 京都大学HPの解説記事(日本語) 日経新聞記事(2015年6月1日朝刊) 読売新聞2015年8月10日16面(関西)掲載
[8]"High dispersion spectroscopy of solar-type superflare stars. I. Temperature, surface gravity, metallicity, and vsin i "Notsu, Y., Honda, S., Maehara, H., Notsu, S., Shibayama, T., Nogami, D., & Shibata, K.PASJ, 2015, 67 (3), 32, (First published online February 22, 2015) ADS doi: 10.1093/pasj/psv001 arXiv:1412.8243
[7]"Statistical properties of superflares on solar-type stars based on 1-min cadence data"Maehara, H., Shibayama, T., Notsu, Y., Notsu, S., Honda, S., Nogami, D., & Shibata, K.EPS (Earth, Planets and Space), 2015, 67, 59, (Published online: 2015 April 29) ADS doi:10.1186/s40623-015-0217-z arXiv:1504.00074 cf. RHESSI Science Nugget No. 253 (Author: Hiroyuki Maehara)
[6]"Two Sun-like Superflare Stars Rotating as Slow as the Sun"Nogami, D., Notsu, Y., Honda, S., Maehara, H., Notsu, S., Shibayama, T., & Shibata, K.PASJ, 66, L4 (2014 April) ADS arXiv:1402.3772 cf. Research topics page at Kwasan and Hida Observatory website (in Japanese) cf. Research topics page at Subaru telescope webpage (in Japanese)
[5]"Superflares on Solar Type Stars Observed with Kepler I. Statistical Properties of Superflares"Shibayama,T., Maehara, H., Notsu, S., Notsu, Y., Nagao, T., Honda, S., Ishii, T. T., Nogami, D., & Shibata, K.ApJS, 209, 5 (2013 November) ADS arXiv:1308.1480
[4]"High Dispersion Spectroscopy of the Superflare Star KIC6934317"Notsu, S., Honda, S., Notsu, Y., Nagao, T., Shibayama,T., Maehara, H., Nogami, D., & Shibata, K.PASJ, 65, 112 (2013 October) ADS arXiv:1307.4929
[3]"Superflares on Solar-Type Stars Observed with Kepler II. PhotometricVariability of Superflare-Generating Stars : A Signature of Stellar Rotation and Starspots"Notsu, Y., Shibayama,T., Maehara, H., Notsu, S., Nagao, T., Honda, S., Ishii, T. T., Nogami, D., & Shibata, K.ApJ 771 127 (2013 July) ADS arXiv:1304.7361
[2]"Can Superflares Occur on Our Sun?"Shibata, K., Isobe, H., Hillier, A., Choudhuri, A. R., Maehara, H., Ishii, T. T., Shibayama, T., Notsu, S., Notsu, Y., Nagao, T., Honda, S., & Nogami, D. PASJ, 65, 49 (2013 June) ADS arXiv:1212.1361
[1]"Superflares on solar-type stars"Maehara, H., Shibayama, T., Notsu, S., Notsu, Y., Nagao, T., Kusaba, S., Honda, S., Nogami, D., & Shibata, K. Nature, Volume 485, Issue 7399, pp. 478-481 (2012 May) ADS doi:10.1038/nature11063 cf. Research results page at Kyoto Univesersity website (in Japanese)
Proceedings
Proceedings
"Overview of the LAPYUTA mission (Life-environmentology, Astronomy, and PlanetarY Ultraviolet Telescope Assembly)"Fuminori Tsuchiya, Go Murakami, Atsushi Yamazaki, Shingo Kameda, Tomoki Kimura, Ryoichi Koga, Kei Masunaga, Shotaro Sakai, Masahiro Ikoma, Akifumi Nakayama, Masami Ouchi, Masaomi Tanaka, Shin Toriumi, Masato Kagitani, Kazuo Yoshioka, Chihiro Tao, Hajime Kita, Hidenobu Yajima, Hideo Sagawa, Hiromu Nakagawa, Hitoshi Hamori, Jun Kimura, Keigo Enya, Kosuke Namekata, Manabu Yamada, Masaki Kuwabara, Naoki Terada, Naoya Ozaki, Norio Narita, Sae Aizawa, Seiko Takagi, Shinitiro Sakai, Shohei Aoki, Shoya Matsuda, Shuya Tan, Takahiro Sumi, Takanori Kodama, Takashi Moriya, Takatoshi Shibuya, Takehiko Satoh, Taro Kawano, Nozomu Tominaga, Toshifumi Shimizu, Yasumasa Kasaba, Yoichi Yatsu, Yoshiaki Ono, Yudai Suzuki, Yuichi Matsuda, Yuki Harada, Yuta NotsuProc. SPIE 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 130930I (21 August 2024)DOI:10.1117/12.3017298
"Statistical properties of superflares on solar-type stars with Kepler data"Notsu, Y., Maehara, H., Shibayama, T., Honda, S., Notsu, S., Namekata, K., Nogami, D., & Shibata, K.Proceeding of "The 19th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS19), Uppsala, Sweden, 06-10 June 2016." ADS DOI:10.5281/zenodo.59138 arXiv:1608.00186
"High dispersion spectroscopy of solar-type superflare stars with Subaru/HDS"Notsu, Y., Honda, S., Maehara, H., Notsu, S., Shibayama, T., Nogami, D., & Shibata, K.Proceeding of IAU Symposium No. 320 "Solar and Stellar Flares and Their Effects on Planets" (IAU Symposium, Volume 320, pp. 138-143). ADS DOI:10.1017/S1743921316000430 arXiv:1510.08143 See also Link of the all proceeding of the symposium
Books
Books
"Explorations of Extreme Space Weather Events from Stellar Observations and Archival Investigations" Hayakawa, H., Notsu, Y., Ebihara, Y. (2023) doi: 10.1007/978-981-19-7765-7_11 (ADS)In: Kusano, K. (eds) Solar-Terrestrial Environmental Prediction. Springer, Singapore.
「3-4-1.太陽型星のスーパーフレア (3-4.超巨大フレアと極端宇宙天気現象の可能性)」 野津湧太, 2021年5月31日公開 DOI:10.18999/pstep.2021.3.4.1 pdf 「太陽地球圏環境予測 オープン・テキストブック (PSTEP Open Textbook)」内の1章を執筆担当 テキストブック全体URL 目次 紹介記事(名大ISSE)
Other Articles in English
Other Articles in English
Connecting Solar and Stellar Flares/CMEs: Expanding Heliophysics to Encompass Exoplanetary Space WeatherB. J. Lynch, B. E. Wood, M. Jin, T. Török, X. Sun, E. Palmerio, R. A. Osten, A. A. Vidotto, O. Cohen, J. D. Alvarado-Gómez, J. J. Drake, V. S. Airapetian, Y. Notsu, A. Veronig, K. Namekata, R. M. Winslow, L. K. Jian, A. Vourlidas, N. Lugaz, N. Al-Haddad, W. B. Manchester, C. Scolini, C. J. Farrugia, E. E. Davies, T. Nieves-Chinchilla, F. Carcaboso, C. O. Lee, T. M. Salmanwhite paper submitted to the Heliophysics 2024--2033 Decadal SurveyarXiv:2210.06476
"Solar Analogs as a Tool to Understand the Sun"Allison Youngblood, Steve Cranmer, Sam Van Kooten, James Paul Mason, J. Sebastian Pineda, Kevin France, Dmitry Vorobiev, Frank Eparvier, Yuta Notsuwhite paper submitted to the Heliophysics 2050 Workshop ADS arXiv:2009.05672
"Do Kepler Superflare Stars Really Include Slowly Rotating Sun-like Stars?"Yuta NOTSURHESSI Science Nugget No.354 (Published on July 8th 2019)
"Reconstructing Extreme Space Weather from Planet Hosting Stars"V. S. Airapetian, V. Adibekyan, M. Ansdell, D. Alexander, T. Bastian, S. Boro Saikia, A. S. Brun, O. Cohen, M. Cuntz, W. Danchi, J. Davenport, J. DeNolfo, R. DeVore, C. F. Dong, J. J. Drake, K. France, F. Fraschetti, K. Herbst, K. Garcia-Sage, M. Gillon, A. Glocer, J. L. Grenfell, G. Gronoff, N. Gopalswamy, M. Guedel, H. Hartnett, H. Harutyunyan, N. R. Hinkel, A. G. Jensen, M. Jin, C. Johnstone, P. Kalas, S. R. Kane, C. Kay, I.N. Kitiashvili, O. Kochukhov, D. Kondrashov, J. Lazio, J. Leake, G. Li, J. Linsky, T. Lueftinger, B. Lynch, W. Lyra, A. M. Mandell, K. E. Mandt, H. Maehara, M. S. Miesch, A. M. Mickaelian, S. Mouchou, Y.Notsu, L. Ofman, L. D. Oman, R. A. Osten, R. Oran, R. Petre, R. M. Ramirez, G. Rau, S. Redfield, V. Réville, S. Rugheimer, M. Scheucher, J. E. Schlieder, K. Shibata, J. D. Schnittman, David Soderblom, A. Strugarek, J. D. Turner, A. Usmanov, Van Der Holst, A. Vidotto, A. Vourlidas, M.J. Way, Wolk, G. P. Zank, P. Zarka R., Kopparapu, S. Babakhanova, A. A. Pevtsov, Y. Lee, W. Henning, K. D. Colón, E. T. Wolf White Paper submitted to the Astronomy and Astrophysics Decadal Survey (Astro2020), 8 pages, 1 figure, ADS (arXiv:1903.06853)
"Exploring Extreme Space Weather Factors of Exoplanetary Habitability"V. S. Airapetian (GSFC/SEEC and American University, DC), V. Adibekyan (UPORTO), M. Ansdell (University of Hawaii), O. Cohen (University of Massachusetts Lowell), M. Cuntz (UFZ), W. Danchi (GSFC/SEEC), C. F. Dong (Princeton University), J. J. Drake (Harvard-Cfa), A. Fahrenbach (Caltech), K. France (CU Boulder), K. Garcia-Sage (GSFC/SEEC/CUA), A. Glocer (GSFC/SEEC), J. L. Grenfell (German Aerospace Center), G. Gronoff (NASA LaRC/SSAI), H. Hartnett (Arizona State University), W. Henning (NASA GSFC), N. R. Hinkel (Arizona State University), A. G. Jensen (UNK), M. Jin (LMSAL), P. Kalas (UC Berkeley), S. R. Kane (UC Riverside), K. Kobayashi (Yokohama National University), R. Kopparapu (GSFC/SEEC/UMD), J. Leake (GSFC), M. López-Puertas (Inst de Astrofisica de Andalucía), T. Lueftinger (University of Vienna), B. Lynch (UC Berkeley), W. Lyra (Max Planck Institute for Astronomy), A. M. Mandell (GSFC/SEEC), K. E. Mandt (Johns Hopkins University APL), W. B. Moore (Hampton University and National Institute of Aerospace), D. Nna-Mvondo (NASA GSFC/USRA), Y.Notsu (Kyoto University), H.Maehara (Kyoto University), Y.Yamashiki (Kyoto University), K. Shibata (Kyoto University), L. D. Oman (GSFC/SEEC), R. A. Osten (STScI, JHU), A. Pavlov (GSFC/SEEC), R. M. Ramirez (ELSI), S. Rugheimer (University of St Andrews), J. E. Schlieder (GSFC/SEEC), J. D. Schnittman (NASA GSFC), E. L. Shock (Arizona State University), C. Sousa-Silva (Massachusetts Institute of Technology), M. J. Way (NASA GISS), Y. Yang (NASA GSFC), P. A. Young (Arizona State University), G. P. Zank (University of Alabama) 6 pages, the white paper submitted to the US National Academy of Sciences call on Exoplanet Science Strategy, (arXiv:1803.03751)
"Life Beyond the Solar System: Space Weather and Its Impact on Habitable Worlds"Airapetian, V. S.; Danchi, W. C.; Dong, C. F.; Rugheimer, S.; Mlynczak, M.; Stevenson, K. B.; Henning, W. G.; Grenfell, J. L.; Jin, M.; Glocer, A.; Gronoff, G.; Lynch, B.; Johnstone, C.; Lueftinger, T.; Guedel, M.; Kobayashi, K.; Fahrenbach, A.; Hallinan, G.; Stamenkovic, V.; Cohen, O.; Kuang, W.; van der Holst, B.; Manchester, C.; Zank, G.; Verkhoglyadova, O.; Sojka, J.; Maehara, H.; Notsu, Y.; Yamashiki, Y.; France, K.; Lopez Puertas, M.; Funke, B.; Jackman, C.; Kay, C.; Leisawitz, D.; Alexander, D.5 pages, the white paper was submitted to the National Academy of Sciences in support of the Astrobiology Science Strategy for the Search for Life in the Universe,(arXiv:1801.07333)
"High Dispersion Spectroscopy of solar-type superflare stars" Yuta Notsu RHESSI Science Nugget No. 254 (Published on June 8th 2015.)
Articles in Japanese
Articles in Japanese
「【特集】スーパーフレアの時代： 恒星活動は系外惑星にどう影響するか」岩波 「科学」2024年12月号 Link
「京都府立洛北高等学校・附属中学校 卒業生メッセージ (2023年9月)」 link(pdf)
「環境問題としての光害―天文学の観点から―」柴田一成、野上大作、前原裕之、野津湧太「環境技術」2020年(49巻)3号 pp.138-142 Link
「ススメ！理 系 目指せ大学院博士課程: 学部時代に、『Nature』に共著者として名を連ね、 今回の論文はアメリカで注目を集める 」大学ジャーナル 2019年12月号 pdf
「太陽型星のスーパーフレア」 : 野津 湧太，柴田 一成特集記事「惑星ラボからこんにちは！ 〜京都大学宇宙総合学研究ユニット〜」の1記事 日本惑星科学会学会誌「遊・星・人」2017年4号(12月発行) pp.159-168 目次 pdf
「生命誕生と太陽フレア -新説:生命に必要な環境と材料は太陽フレアで作られた！？」「[特集]太陽フレア 〜地球の生命を支える恵みの嵐か、災いをもたらす恐ろしい嵐か〜」の1記事 milsil (国立科学博物館情報誌) 2017年第4号(7月発行) link
「スーパーフレアの謎」Kyoto Science Sequenceさん作成の研究紹介リーフレット link
「僕たちにとってのスーパーフレア」 野津翔太・野津湧太 京一中洛北高校同窓会誌「あかね」 第52号 2014年10月発行, 目次
Open Astronomy 京大コラム 「No.7 遠い星々のフレア観測」, 「No.8 スーパーフレアの謎」 野津翔太・野津湧太の２名にて担当した回。 Open Astronomyという天体写真共有アプリ(無料)で読める記事で、京大宇宙物理・附属天文台関係の研究を紹介している一連のコラム。
「特集：太陽型星におけるスーパーフレア （4）スーパーフレア星と巨大黒点」 野津湧太 天文月報 2014年7月号 p.367-374, ※天文月報2014年5,7,9月号に計6記事掲載された特集記事の一つ。 ※ 2014年5月号, 2014年9月号
「京都大学発トピックス 太陽型星におけるスーパーフレアを発見 学部生で論文を発表した 太陽研究のガリレオたち」 柴山拓也、野津翔太、野津湧太の3人で受けたインタビュー記事 京都大学入学案内 知と自由への誘い 2014 p.7 記事本文
Accepted Observing Proposals
(The followings may not be a complete list ....)Accepted Observing Proposals
"A unified understanding of flare profile changes of chromospheric lines with the Balmer jump ratio." Notsu, Y. et al. (as PI), 2020, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 5 half nights (2020 Q1, ID: CU07)
"A unified understanding of flare profile changes of chromospheric lines with the Balmer jump ratio" Notsu, Y. et al. (as PI), 2020, ARCSAT 0.5m telescope at Apache Point Observatory for 7 nights (2020 Q4, ID: AS08)
"Spectroscopic monitoring observations of M-dwarf superflare stars, simultaneously with ARCSAT0.5m photometric observations" Notsu, Y. et al. (as PI), 2019, ARCSAT 0.5m telescope at Apache Point Observatory for 3 nights (2019 Q4, ID: AS08)
"Spectroscopic monitoring observations of M-dwarf superflare stars, simultaneously with ARCSAT0.5m photometric observations (Joint proposal of CU and UW teams)" Notsu, Y. et al. (as PI), 2019, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 3 half nights (2019 Q4, ID: UW10)
"Spectroscopic monitoring observations of M-dwarf superflare star EV Lac, simultaneously with TESS Cycle-2 Sector 16 and ARCSAT0.5m photometric observations (Joint proposal of CU and UW teams)" Notsu, Y. et al. (as PI), 2019, ARCSAT 0.5m telescope at Apache Point Observatory for 7 nights (2019 Q3, ID: AS08)
"Spectroscopic monitoring observations of M-dwarf superflare star EV Lac, simultaneously with TESS Cycle-2 Sector 16 and ARCSAT0.5m photometric observations (Joint proposal of CU and UW teams)" Notsu, Y. et al. (as PI), 2019, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 6 half nights (2019 Q3, ID: UW03 & CU06)
"SOLAR-LIKE PERIODIC ACTIVITIES AND STELLAR FLARES FROM THE CLOSEST NEIGHBOUR PROXIMA CENTAURI"Enoto, T. et al. (as Co-I), 2019, NICER cycle 1 GO-program (ID: 2105), accepted proposal list
"Spectroscopic monitoring observations of superflare stars, simultaneously with ARCSAT0.5m photometric observations" Notsu, Y. et al. (as PI), 2019, ARCSAT 0.5m telescope at Apache Point Observatory for 6 nights (2019 Q2, ID:AS04), link
"Sectroscopic monitoring observations of superflare stars, simultaneously with ARCSAT0.5m photometric observations" Notsu, Y. et al. (as PI), 2019, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 3 half nights (2019 Q2, ID:UW09), link
"Spectroscopic monitoring observations of superflare stars, simultaneously with TESS Cycle-1 Sector 7 and ARCSAT0.5m photometric observations" Notsu, Y. et al. (as PI), 2019, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 6 half nights (2019 Q1, ID:UW03), link
"Spectroscopic monitoring observations of G,K-type superflare candidate stars simultaneously with TESS Cycle-1 Sector 4 observation" Notsu, Y. et al. (as PI), 2018, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 6 half nights (2018 Q4, ID:UW03), link
"Spectroscopic observations of nearby solar-type superflare candidate stars observed by TESS" Notsu, Y. et al. (as PI), 2018, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 4 half nights (2018 Q3, ID:UW05), link
"Spectroscopic observations of nearby solar-type superflare candidate stars" Notsu, Y. et al. (as PI), 2018, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 3 half nights (2018 Q2, ID:UW08), link
"Spectroscopic observations of nearby solar-type superflare candidate stars" Notsu, Y. et al. (as PI), 2018, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 7 half nights (2018 Q1, ID:UW10), link
" Spectroscopic observations of solar-type superflare stars found from Kepler short (1-min) time cadence data" Notsu, Y. et al. (as PI), 2017, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 6 half nights (2017 Q4, ID:UW02), link
" Spectroscopic observations of solar-type superflare stars found from Kepler short (1-min) time cadence data" Notsu, Y. et al. (as PI), 2017, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 3 half nights (2017 Q3, ID:UW07), link
" Spectroscopic observations of solar-type superflare stars found from Kepler short (1-min) time cadence data" Notsu, Y. et al. (as PI), 2017, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 3 half nights (2017 Q2, ID:UW08), link
"Spectroscopic observations of slowly-rotating Sun-like stars with large starspots" Notsu, Y. et al. (as PI), 2016, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 4 half nights (2016 Q4, ID:UW06), link
"高い磁気活動を示す太陽型星の差動回転" Notsu, Y. et al. (as PI), 2016, OAO/HIDES-F for 8 nights (OAO Normal Program, ID: 16B-1-CN06), link
"Spectroscopic observations of slowly-rotating Sun-like stars with large starspots" Notsu, Y. et al. (as PI), 2016, Echelle Spectrograph of ARC3.5m telescope at Apache Point Observatory for 4 half nights (2016 Q3, ID:UW03), link
"巨大黒点を持つ明るい太陽型星の高分散分光観測II" Notsu, Y. et al. (as PI), 2016, OAO/HIDES-F for 3 nights (OAO Normal Program, ID: 16A-1-CN09), link
"巨大黒点を持つ明るい太陽型星の高分散分光観測" Notsu, Y. et al. (as PI), 2015, OAO/HIDES-F for 4 nights (OAO Normal Program, ID: 15B-1-CN08), link
"明るいスーパーフレア星の高分散分光観測" Notsu, Y. et al. (as PI), 2015, OAO/HIDES-F for 2 nights (OAO Normal Program, ID: 15A-06), link
"強いX線放射を示すG型星の高分散分光観測" Notsu, S. et al. (as Co-I), 2014, OAO/HIDES-F for 7 nights (OAO Normal Program, ID: 14B-05), link
"High dispersion spectroscopy of slowly-rotating superflare stars" Notsu, Y. et al. (as PI), 2014, Subaru/HDS for 0.5 nights (Subaru Service Program, ID: S14A-209S), link
"強いX線放射を示すG型星の高分散分光観測" Notsu, S. et al. (as Co-I), 2014, OAO/HIDES-F for 9 nights (OAO Normal Program, ID: 14A-15), link
"High Dispersion Spectroscopy of Sun-like Stars showing Superflares" Notsu, Y. et al. (as PI), 2013, Subaru/HDS for 2 nights (Subaru Normal Program, ID: S13A-045), link
"High Dispersion Spectroscopy of Solar-Type Stars showing Superflares" Notsu, Y. et al. (as PI), 2012, Subaru/HDS for 3 nights (Subaru Normal Program, ID: S12B-111), link
"High Dispersion Spectroscopy of a G-Type Star Causing Superflares" Notsu, Y. et al. (as PI), 2011, Subaru/HDS for 0.5 nights (Subaru Service Program, ID:S11B-137S), link