＊準備中＊

宇宙に関する研究をしています。

特に銀河の形成と進化に興味があり、すばる望遠鏡や ALMA 望遠鏡を用いた遠方宇宙にある若い銀河の観測を行っています。最近は理論モデルの構築も行っています。

[キーワード] 銀河形成, 銀河進化, クェーサー吸収線系, 準解析的銀河形成モデル, 宇宙大規模構造, 銀河団, 原始銀河団, クェーサー, 超巨大ブラックホール

My primary research interests are the formation and evolution of galaxies and large-scale structures. Especially, I am interested in the gas-rich objects at high redshift such as quasar absorption line systems, emission line galaxies.

I have worked on observational studies of high-z galaxies by using the Subaru Telescope, ALMA, and so on.
Recently, I am working on the theoretical approaches by utilizing a semi-analytic galaxy formation model, the New Numerical Galaxy Catalog (ν2GC). 

[Key Words] Quasar absorption system, Damped Lyα system, Galaxy Formation, Galaxy Evolution, Semi-analytic galaxy formation model, Large scale structure of the Universe, Galaxy cluster, proto-cluster, quasar, supermassive black hole

●Publications

[1st author/refereed]

1.  Kazuyuki Ogura, Masahiro Nagashima, Rhythm Shimakawa, Masao Hayashi, Masakazu A. R. Kobayashi, Taira Oogi, Tomoaki Ishiyama, Yusei Koyama, Ryu Makiya, Katsuya Okoshi, Masato Onodera, Hikari Shirakata, "Quantifying the effect of the field variance on the Hα luminosity function with the  New Numerical Galaxy Catalogue (ν2GC)", The Astrophysical Journal (ApJ), 895, 9 (2020)

2.  Kazuyuki Ogura, Hideki Umehata, Yoshiaki Taniguchi, Yuichi Matsuda, Nobunari Kashikawa, Kartik Sheth, Katsuhiro Murata, Masaru Kajisawa, Masakazu A. R. Kobayashi, Takashi Murayama, and Tohru Nagao, "ALMA band 8 observations of DLA2233+131 at z=3.150", Publications of Astronomical Society of Japan (PASJ) , Vol.72, 2, 29 (2020) 

3.  Kazuyuki Ogura, Tohru Nagao, Masatoshi Imanishi, Nobunari Kashikawa, Yoshiaki Taniguchi, Masaru Kajisawa, Masakazu A. R. Kobayashi, Yoshiki Toba and Kodai Nobuhara, "A search for Lyα emitters around a concentrated region of strong Lyα  absorbers at z=2.3", PASJ, Vol.69, 3, 51 (2017)

4.  Kazuyuki Ogura and Jun Fukue, "Observational Appearance and Spectrum of Black Hole Winds: Effect of  Electron Scattering", PASJ, Vol.65, No.4, 92 (2013)

[1st author/non-refereed]

1. Kazuyuki Ogura, Akira Arai, Kozo Sadakane, and Katsura Matsumoto, "Spectroscopic Observation System of 51cm Telescope at Osaka Kyoiku University (大阪教育大学51 cm望遠鏡における分光観測システムの構築)", Memoirs of Osaka Kyoiku University, Ser.III Natural Science and Applied Science, 63, 75 (2014)

[Co-authors/refereed]

1. Takuji Yamashita, Tohru Nagao, Hiroyuki Ikeda, Yoshiki Toba, Masaru Kajisawa, Yoshiaki Ono, Masayuki Tanaka, Masayuki Akiyama, Yuichi Harikane, Kohei Ichikawa, Toshihiro Kawaguchi, Taiki Kawamuro, Kotaro Kohno, Chien-Hsiu Lee, Kianhong Lee, Yoshiki Matsuoka, Mana Niida, Kazuyuki Ogura, Masafusa, Onoue, and Hisakazu Uchiyama, “Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). III. Discovery of a z=4.72 Radio Galaxy with Lyman Break Technique”, The Astronomical Journal (AJ), 160, 2, 60 (2020) 

2. Mizuho Tomida, Masashi Orihashi, Jun Fukue and Kazuyuki Ogura, “Apparent photosphere, thermalization surface and spectrum of black hole winds: Frequency-dependent case”, PASJ, Vol.67, 6, 111 (2015) 

3. Tomohito Ohshima, Taichi Kato, …, Kazuyuki Ogura (20th), and 45 coauthors, “Study of Negative and Positive Superhumps in ER Ursae Majoris”, PASJ, Vol.66, No.4, 67 (2014)

4. Shinichi Nakagawa, Ryo Noguchi, Eriko Iino, Kazuyuki Ogura, Katsura Matsumoto, “Multi-Color Photometry of the Outburst of the New WZ Sge-type Dwarf Nova OT J012059.6+325545”, PASJ, Vol.65, No.3, 70 (2013)

5. Kato Taichi, Hambsch Franz-Josef, …, Ogura Kazuyuki (14th), and 84 coauthors, “Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011–2012)”, PASJ, Vol.65, No.1, 23 (2013) 

6. Taichi Kato, Maehara, Hiroyuki, …, Kazuyuki Ogura (24th), and 55 coauthors, “Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. II: The Second Year (2009–2010)”, PASJ, Vol.62, No.6, 1525 (2010)

●Observational Experience

1.  Subaru S13B-009: "Revealing the Nature of Dense Gas Clouds in High-z Quasar Host Galaxies" (MOIRCS, Co-Is)

2.  Subaru S15A-025: "A search for missing over-density regions through high-z damped Lya systems” (Suprime-Cam, 2 nights, PI)

3.  Subaru S16A-198S: “A search for missing over-density regions through high-z damped Lya systems” (Suprime-Cam, Service, PI)

4.  国立天文台 岡山天体物理観測所 188 cm 望遠鏡 2016A: "宇宙で最も明るい赤外線銀河候補のISLE 近赤外線分光観測" (ISLE, Co-Is)

5.  国立天文台 岡山天体物理観測所 188 cm 望遠鏡 2016B: "極超高光度赤外線銀河候補のISLE 近赤外線分光観測" (ISLE, Co-Is)

6.  Subaru S17A-186S: “A search for missing over-density regions through high-z damped Lya systems” (Suprime-Cam, Service, PI)

7.  ALMA Cycle 5 2017.1.00345.S "Central-Inversion Ly alpha Emission in a DLA" (Band-8, Co-Is)

8.  CFHT 17AT03: “MEGACAM u-band survey for the first identification of a DLA-traced over-density region” (Megacam, Corresponding)

9.  Gemini (South) GS-2017B-FT-17: "Exploring the most distant radio galaxies" (GMOS-S, Co-Is)

10.  NOAO 2019B-0118: "Systematic exploration of optical counterparts of DLAs at z > 2" (SOAR tele-scope/Goodman spectrograph, 2 nights, Co-Is)

11.  Subaru S22B-147S: "Spectroscopic Confirmation of Lens Galaxy associated with Multiple Absorbers" (FOCAS, Co-Is)

●科研費

1.  若手研究 (2025 - 2029年): 輝線銀河準解析的モデルを用いた銀河の星形成率の環境依存性および星質量依存性の調査, 研究代表, 3,770千円

2.  特別研究員奨励費 (2016 - 2018年): すばる望遠鏡による広視野クェーサー吸収線系観測から探る銀河と宇宙大規模構造の進化, 研究代表, 1,900千円

●その他、競争的獲得資金

1.  国立天文台滞在型研究員 「DLA 集中領域における輝線天体の探査」 (2016年度), 147千円

2.  日本天文学会 早川幸男基金 (第94回, 2016年), 245千円, 報告書

3.  天文学振興財団 国際研究支援事業 (国際研究会参加) に対する助成 (2016年), 187千円 (＊他資金を同時に獲得したため辞退)