CV

Employment/Fellowship

• April 2024 - present, Assistant Professor (fixed-term) at Frontier Research Institute for Interdisciplinary Sciences and Department of Geophysics, Tohoku University, Japan

• October 2023 - March 2024, Specially Appointed Assistant Professor at Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), Japan

  • September 2021 - March 2024, Part-time Lecturer at Kanagawa University, Japan (Omnibus lectures "General Astrophysics" and "Physical Science")

• October 2020 - September 2023, Special Postdoctoral Researcher at RIKEN, Japan (Host Researcher: Prof. Nami Sakai)

• October 2018 - September 2020, Research Scientist C at SRON Netherlands Institute for Space Research, The Netherlands (Supervisor: Prof. Michiel Min)

• April 2018 - September 2018, Postdoctoral Researcher at Earth-Life Science Institute (ELSI), Tokyo Institute of Technology, Japan (Supervisors: Prof. Shigeru Ida and Prof. Yuka Fujii)

• April 2015 - March 2018, JSPS Research Fellow (DC1)/FMSP (Leading Graduate Course for Frontiers of Mathematical Sciences and Physics) course student

Education

Ph. D.

March 2018, Ph. D. Degree from the University of Tokyo, Japan

• Supervisor: Prof. Masahiro Ikoma

• Thesis title: “Theoretical modeling of transmission spectra of exoplanet atmospheres with hydrocarbon haze and applications to multi-wavelength transit observations”

Master

March 2015, Master’s Degree from the University of Tokyo, Japan

• Supervisor: Prof. Masahiro Ikoma

• Thesis title: “Transmission spectrum models of exoplanet atmospheres with haze: Toward understanding the atmospheric composition and origin”

Bachelor

March 2013, Bachelor’s Degree from the University of Tokyo, Japan

Award

1. March 2015, Research Encouragement Award (Master), School of Science, The University of Tokyo

Grants

KAKENHI

1. April 2023 - March 2026, Grant-in-Aid for Scientific Research (B), 23H01224 "惑星大気を模した高温水素ガス下での分子線実測に基づく系外惑星探査", 15,300,000 JPY in total, Co-I (450,000 JPY to Y. Kawashima)

2. June 2022 – March 2027, Grant-in-Aid for Transformative Research Areas (A), 22H05150 "理論班：惑星CO環境のモデリング (Theoretical group: modeling of the planetary CO environment)", 180,700,000 JPY in total, Co-I (8,850,000 JPY to Y. Kawashima)

3. July 2021 – March 2023 (the program lasts until March 2026), Grant-in-Aid for Scientific Research (S), 21H04998 "Mapping Habitable Planetary Environments with Exoplanet Imaging”, 183,820,000 JPY in total, Co-I (3,200,000 JPY to Y. Kawashima)

4. April 2021 - March 2024, Grant-in-Aid for Early-Career Scientists, 21K13984 "原始惑星系円盤の化学・物理進化計算と系外惑星大気の観測から探る惑星形成過程", 3,500,000 JPY, PI

5. April 2015 - March 2018, Grant-in-Aid for JSPS Fellows, 15J08463 "ヘイズの存在可能性を考慮した短周期系外惑星の大気組成の解明", 2,800,000 JPY, PI

Others

1. October 2020 - September 2023, RIKEN Special Postdoctoral Researcher Research budget, 3,000,000 JPY in total (1,000,000 JPY per year)

2. March 2019, Leids Kerkhoven-Bosscha Fonds (600 EUR)

3. June - July 2016, Student Fellow of 2016 Kavli Summer Program in Astrophysics 2016: Exoplanetary Atmospheres

Service

Referee for journals

• Nature Astronomy

• The Astrophysical Journal Letters

• The Astrophysical Journal

• The Astronomical Journal

• The Planetary Science Journal

• Icarus

• 遊星人

External reviewer

• HST

• OPTICON-TAC

SOC/convener of conferences

• Convener of the Goldschmidt 2023 1f "Exoplanet atmospheric characterization, interior-surface-atmosphere interactions, and planetary habitability"

• Convener of the Japan Geoscience Union Meeting 2023, P-EM11 “Exoplanet”

• SOC of the COSPAR 2022 44th Scientific Assembly, COSPAR-22-B6.1 “Exoplanet Detection and Characterisation: Current Research, Future Opportunities and the Search for Life outside the Solar System”

Accepted observing proposals

PI proposals

1. Y. Kawashima, K. Masuda (co-PI) et al., "Chemical & Kinematic Characterization of Benchmark Brown Dwarfs with IRD", Subaru/IRD+NGS-AO & REACH+NGS-AO (2.0 nights, 1.0 night of which additionally allocated), S21A-091

2. Y. Kawashima et al., "Exploring Nitrogen, Sulfur, and Carbon Chemistry of a Late-T Dwarf", Subaru/IRD (0.5 night), S20B-105 (additionally allocated)

3. Y. Kawashima et al., "Exploring Methane-Haze Photochemistry in the Atmosphere of WASP-80b", Subaru/FOCAS (1 night), S15A-109

Co-I proposals

1. L. Kreidberg et al., “The SPACE Program: a Sub-neptune Planetary Atmosphere Characterization Experiment”, HST (205 orbits), Cycle 30, 17192

2. K. Masuda et al., "Hunting Nearby Brown-dwarf Binaries with Subaru and Gaia", Subaru/IRD+NGS-AO&REACH+NGS-AO (2 nights), S22A-054

3. S. K. Nugroho et al., "Characterising the atmosphere of the extremely hot-Jupiter WASP-33b", Subaru/IRD+NGS-AO (2 nights), S21B-111

4. J. Libby-Roberts and Z. K. Berta-Thompson et al., "Unveiling the Atmospheric Composition and Haze Formation Rates in the Young, Cool, Super-Puff Kepler-51d", JWST/NIRSpec/Bright Object Time Series (20.5 hours), GO 2571

5. J.-M. Desert et al., "The nature, origin, and fate of two planets of a newborn system through the lens of their relative atmospheric properties", JWST/NIRSpec/Bright Object Time Series (24.6 hours), GO 2149

6. M. Min et al., "Mineral clouds in the atmosphere of the hot Jupiter HD189733b", JWST/MIRI/LRS (6.4 hours), GO 2001

7. H. Kawahara et al., "Search for C/O tracers by the First High-Dispersion Coronagraphy", Subaru/REACH+NGS-AO (2.5 nights), S21A-062

8. H. Kawahara et al., "Search for C/O tracers by the First High-Dispersion Coronagraphy", Subaru/IRD+SCExAO+NGS-AO (3 nights), S20B-034

9. L. Kreidberg et al., "Exploring the Demographics of Exo-Neptunes: Atmospheric Characterization of a Cool Sub-Neptune from TESS", HST (17 orbits), 16181

10. H. Kawahara et al., "Finding Methane/Ammonia in a Cloudless Warm Neptune", Subaru/IRD+NGS-AO (0.5 night), S20A-019

11. K. Kawauchi et al., "Detailed atmospheric investigation of cooler hot Jupiters", Subaru/HDS (2 nights), S18B-102

12. A. Fukui et al., "Probing the Skies of the Potentially Habitable Planets", Subaru/MOIRCS & Gemini/GMOS (0.5 + 0.5 night), S17B-120

13. K. Kawauchi et al., "高温のホットジュピターにおける昼夜境界層のTiO/VO検出", OAO 188cm telescope (6-8 nights), 17B-1-CN08

14. A. Fukui et al., "ウォームジュピターWASP-80bの大気におけるヘイズの存在確認とその特性の理解II", OAO 188cm telescope (4 nights), 16B-1-CN22

15. A. Fukui et al., "海王星サイズのトランジット惑星におけるレイリースロープの観測", OAO 188cm telescope (5 nights), 16A-1-CN10

16. T. Ryu et al., "低金属星周りのホットジュピターWASP-37bに対するトランジット観測", OAO 188cm telescope (4 nights), 15A-12

17. N. Narita et al., "Probing Transit Spectra of the Youngest Hot Jupiter", Subaru/FOCAS & Gemini/GMOS (1 night), S15A-073

18. A. Fukui et al., "Probing Molecules in the Atmosphere of Hot Uranus GJ3470b", Subaru/MOIRCS (1 night), S14B-119

19. N. Narita et al., "First Measurement of Mass-Loss Rate and Transmission Spectrum of CVSO30b, Subaru/MOIRCS (1 night), S14B-145

20. A. Fukui et al., "A Comparative Study of Atmospheres of Warm Exo-Neptunes", Subaru/MOIRCS & FOCAS (2 nights), S14A-122

21. N. Narita et al., "Exploring Methane-Haze Photochemistry in the Atmosphere of WASP-80b", Subaru/MOIRCS (1 night), S14A-083

22. K. Kawauchi et al., "Subaru-Hubble Joint Transmission Spectroscopy Low-Density Hot Jupiters II.", Subaru/HDS (1 night), S14A-171

Membership

• Japan Geoscience Union, since May 2013

• The Japanese Society for Planetary Sciences, since July 2013

• The Astronomical Society of Japan, since 2016

Others

• ORCiD: 0000-0003-3800-7518

• Google Scholar

• GitHub: ykawashima