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Namekata, Kosuke
The HAKUBI Center for Advanced Research Program-Specific Assistant Professor
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Last Updated :2025/04/23
Basic Information
Email Address
Email Address
namekata.kosuke.3s
kyoto-u.ac.jp
Professional Memberships
- From Apr. 2017, To PresentJapan Geoscience Union
- From Jun. 2016, To PresentAstronomical Society of Japan
- From Jan. 2020, To Dec. 2021American Astronomical Society
Academic Degree
Academic Resume (Undergraduate School/Majors)
Research History
- From Dec. 2024, To PresentThe Catholic University of America, Department of Physics, Adjunct Assistant Research Scientist
- From Oct. 2024, To Dec. 2024American University, Department of Physics, Adjunct Research Assistant Professor
- From Oct. 2024, To PresentNASA Goddard Space Flight Center, Heliophysics Science Division, JSPS Overseas Research Fellow/Research Associate Scientist
- From May 2019, To Sep. 2019University of Colorado at Boulder, Laboratory for Atmospheric and Space Physics, Visiting Researcher
- From Apr. 2024, To Mar. 2025National Astronomical Observatory of Japan, Division of Science, Special visiting researcher
- From Apr. 2024, To PresentKyoto University, The Hakubi Center for Advanced Research/Graduate School of Science, Program-Specific Assistant Professor
- From Sep. 2023, To Mar. 2024Meisei University, School of Science and Engineering, 非常勤講師
- From Apr. 2021, To Mar. 2024National Astronomical Observatory of Japan, ALMA Project, JSPS fellow PD
- From Apr. 2018, To Mar. 2021Kyoto University, Graduate School of Science, 日本学術振興会特別研究員DC1
ID,URL
ORCID ID
J-Global ID
Researcher number
30987524External link
researchmap URL
list
Last Updated :2025/04/23
Research
Research Interests
- Solar and stellar astophysics
- Observational astronomy
- Solar-type stars
- Loss-mass stars
- Magnetic activity
- Solar and stellar flares
- Exoplanet's environment
Research Areas
Papers
- Comparison of Solar Multifrequency Microwave Data with Other Solar Indices for Understanding Solar and Stellar Microwave DataMasumi Shimojo; Kosuke Namekata; Kazumasa Iwai; Ayumi Asai; Kyoko WatanabeThe Astrophysical Journal, 01 Apr. 2024, Peer-reviewed
- 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 DataYuta 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 ShibataThe Astrophysical Journal, 25 Jan. 2024
- Magnitude Estimates for the Carrington Flare in 1859 September: As Seen from the Original RecordsHisashi Hayakawa; Sabrina Bechet; Frédéric Clette; Hugh S. Hudson; Hiroyuki Maehara; Kosuke Namekata; Yuta NotsuThe Astrophysical Journal Letters, 29 Aug. 2023
- Starspot Mapping with Adaptive Parallel Tempering. II. Application to TESS Data for M-dwarf Flare Stars AU Microscopii, YZ Canis Minoris, and EV LacertaeKai Ikuta; Kosuke Namekata; Yuta Notsu; Hiroyuki Maehara; Soshi Okamoto; Satoshi Honda; Daisaku Nogami; Kazunari ShibataThe Astrophysical Journal, 01 May 2023
- Detection of a High-velocity Prominence Eruption Leading to a CME Associated with a Superflare on the RS CVn-type Star V1355 OrionisShun Inoue; Hiroyuki Maehara; Yuta Notsu; Kosuke Namekata; Satoshi Honda; Keiichi Namizaki; Daisaku Nogami; Kazunari ShibataThe Astrophysical Journal, 27 Apr. 2023
- A Superflare on YZ Canis Minoris Observed by the Seimei Telescope and TESS: Red Asymmetry of Hα Emission Associated with White-light EmissionKeiichi Namizaki; Kosuke Namekata; Hiroyuki Maehara; Yuta Notsu; Satoshi Honda; Daisaku Nogami; Kazunari ShibataThe Astrophysical Journal, 01 Mar. 2023
- Reconstructing the XUV Spectra of Active Sun-like Stars Using Solar Scaling Relations with Magnetic FluxKosuke Namekata; Shin Toriumi; Vladimir Airapetian; Munehito Shoda; Kyoko Watanabe; Yuta NotsuThe Astrophysical Journal, 01 Mar. 2023
- Sun-as-a-star Analyses of Various Solar Active Events Using Hα Spectral Images Taken by SMART/SDDITakato Otsu; Ayumi Asai; Kiyoshi Ichimoto; Takako T. Ishii; Kosuke NamekataThe Astrophysical Journal, 01 Nov. 2022
- Universal Scaling Laws for Solar and Stellar Atmospheric Heating: Catalog of Power-law Index between Solar Activity Proxies and Various Spectral IrradiancesShin Toriumi; Vladimir Airapetian; Kosuke Namekata; Yuta NotsuThe Astrophysical Journal Supplement Series, 01 Oct. 2022
- Sun-as-a-star Analysis of Hα Spectra of a Solar Flare Observed by SMART/SDDI: Time Evolution of Red Asymmetry and Line BroadeningKosuke Namekata; Kiyoshi Ichimoto; Takako T. Ishii; Kazunari ShibataThe Astrophysical Journal, 01 Jul. 2022
- The Atmospheric Response to High Nonthermal Electron-beam Fluxes in Solar Flares. II. Hydrogen-broadening Predictions for Solar Flare Observations with the Daniel K. Inouye Solar TelescopeAdam Kowalski; Joel Allred; Mats Carlsson; Graham S. Kerr; Pier-Emmanuel Tremblay; Kosuke Namekata; David Kuridze; Han UitenbroekThe Astrophysical Journal, 01 Apr. 2022
- Discovery of a Long-duration Superflare on a Young Solar-type Star EK Draconis with Nearly Similar Time Evolution for Hα and White-light EmissionsKosuke 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 ShibataThe Astrophysical Journal Letters, 01 Feb. 2022
- Probable detection of an eruptive filament from a superflare on a solar-type starKosuke 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 ShibataNature Astronomy, 09 Dec. 2021
- Spectroscopic and photometric observations of dwarf nova superoutbursts by the 3.8 m telescope Seimei and the Variable Star NetworkYusuke Tampo; Keisuke Isogai; Naoto Kojiguchi; Hiroyuki Maehara; Kenta Taguchi; Taichi Kato; Mariko Kimura; Yasuyuki Wakamatsu; Masaaki Shibata; Daisaku Nogami; Miho Kawabata; Keiichi Maeda; Kosuke Namekata; Soshi Okamoto; Masaaki Otsuka; Umut Burgaz; Shumpei Nagoshi; Hiroshi Itoh; Tonny Vanmunster; Tamás Tordai; Geoffrey Stone; Katsura Matsumoto; Daiti Fujii; Ryota Matsumura; Momoka Nakagawa; Nodoka Takeuchi; Yuki Zenkou; Elena P Pavlenko; Kirill A Antonyuk; Nikolaj V Pit; Oksana I Antonyuk; Julia V Babina; Aleksei V Baklanov; Aleksei A Sosnovskij; Sergey Yu Shugarov; Nataly Katysheva; Drahomír Chochol; Shawn Dvorak; Pavol A Dubovsky; Tomáš Medulka; Igor Kudzej; Seiichiro Kiyota; Alexandra M Zubareva; Alexandr A Belinski; Natalia P Ikonnikova; Marina A Burlak; Yasuo Sano; Masanori Mizutani; Javier Ruiz; Roger D. Pickard; Franz-Josef HambschPublications of the Astronomical Society of Japan, 13 Jun. 2021
- Optical and X-ray observations of stellar flares on an active M dwarf AD Leonis with Seimei Telescope, SCAT, NICER, and OISTER (vol 72, pg 68, 2020)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; Naoto Kojiguchi; Yasuyuki Wakamatsu; Yusuke Tampo; Daisaku Nogami; Kazunari ShibataPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, Apr. 2021
- Time-resolved spectroscopy and photometry of M dwarf flare star YZ Canis Minoris with OISTER and TESS: Blue asymmetry in the Hα line during the non-white light flareHiroyuki Maehara; Yuta Notsu; Kosuke 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 ShibataPublications of the Astronomical Society of Japan, 05 Feb. 2021
- Statistical Properties of Superflares on Solar-type Stars: Results Using All of the Kepler Primary Mission DataSoshi Okamoto; Yuta Notsu; Hiroyuki Maehara; Kosuke Namekata; Satoshi Honda; Kai Ikuta; Daisaku Nogami; Kazunari ShibataThe Astrophysical Journal, 11 Jan. 2021
- Starspot Mapping with Adaptive Parallel Tempering. I. Implementation of Computational CodeKai Ikuta; Hiroyuki Maehara; Yuta Notsu; Kosuke Namekata; Taichi Kato; Shota Notsu; Soshi Okamoto; Satoshi Honda; Daisaku Nogami; Kazunari ShibataThe Astrophysical Journal, 13 Oct. 2020
- Optical and X-ray observations of stellar flares on an active M dwarf AD Leonis with the Seimei Telescope, SCAT, NICER, and OISTERKosuke Namekata; Hiroyuki Maehara; Ryo Sasaki; Hiroki Kawai; Yuta Notsu; Adam F Kowalski; Joel C Allred; Wataru Iwakiri; Yohko 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; Naoto Kojiguchi; Yasuyuki Wakamatsu; Yusuke Tampo; Daisaku Nogami; Kazunari ShibataPublications of the Astronomical Society of Japan, 01 Aug. 2020
- Temporal Evolution of Spatially Resolved Individual Star Spots on a Planet-hosting Solar-type Star: Kepler-17Kosuke NamekataInstitute of Physics Publishing IOP, Mar. 2020
- Impact of Stellar Superflares on Planetary HabitabilityYosuke 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 ShibataThe Astrophysical Journal, 20 Aug. 2019
- Do Kepler Superflare Stars Really Include Slowly Rotating Sun-like Stars?—Results Using APO 3.5 m Telescope Spectroscopic Observations and Gaia-DR2 DataYuta Notsu; Hiroyuki Maehara; Satoshi Honda; Suzanne L. Hawley; James R. A. Davenport; Kosuke Namekata; Shota Notsu; Kai Ikuta; Daisaku Nogami; Kazunari ShibataThe Astrophysical Journal, 03 May 2019, Peer-reviewed
- The extreme space weather event in September 1909Hisashi Hayakawa; Yusuke Ebihara; Edward W Cliver; Kentaro Hattori; Shin Toriumi; Jeffrey J Love; Norio Umemura; Kosuke Namekata; Takahito Sakaue; Takuya Takahashi; Kazunari ShibataMonthly Notices of the Royal Astronomical Society, 11 Apr. 2019
- Lifetimes and Emergence/Decay Rates of Star Spots on Solar-type Stars Estimated by Kepler Data in Comparison with Those of SunspotsKosuke NamekataThe Astrophysical Journal, 30 Jan. 2019
- Time-resolved spectroscopic observations of an M-dwarf flare star EV Lacertae during a flareSatoshi Honda; Yuta Notsu; Kosuke Namekata; Shota Notsu; Hiroyuki Maehara; Kai Ikuta; Daisaku Nogami; Kazunari ShibataPublications of the Astronomical Society of Japan, 01 Aug. 2018
- Statistical Studies of Solar White-light Flares and Comparisons with Superflares on Solar-type StarsKosuke NamekataThe Astrophysical Journal, 15 Dec. 2017
- Starspot activity and superflares on solar-type starsHiroyuki Maehara; Yuta Notsu; Shota Notsu; Kosuke Namekata; Satoshi Honda; Takako T. Ishii; Daisaku Nogami; Kazunari ShibataPublications of the Astronomical Society of Japan, Jun. 2017
- Spectroscopic observations of active solar-analog stars with high X-ray luminosity, as a proxy of superflare starsYuta Notsu; Satoshi Honda; Hiroyuki Maehara; Shota Notsu; Kosuke Namekata; Daisaku Nogami; Kazunari ShibataPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, Feb. 2017, Peer-reviewed
- Superoutburst of WZ Sge-type dwarf nova below the period minimum: ASASSN-15poKosuke NamekataPublications of the Astronomical Society of Japan, 01 Feb. 2017
- Validation of a scaling law for the coronal magnetic field strength and loop length of solar and stellar flaresKosuke NamekataPublications of the Astronomical Society of Japan, 01 Feb. 2017
Misc.
- MALLSによるA, F, G, and K 型スーパーフレア星の分光観測—Spectroscopy of A, F, G, and K type Superflare stars with MALLS本田 敏志; 野津 湧太; 野津 翔太; 柴山 拓也; 幾田 佳; 行方 宏介; 鄭 祥子; 猪口 睦子; 前原 裕之; 野上 大作; 柴田 一成Bulletin of the Center for Astronomy, University of Hyogo = 兵庫県立大学天文科学センター紀要 / 兵庫県立大学自然・環境科学研究所天文科学センター 編, 2016
- 太陽型星スーパーフレアに伴うプロミネンス噴出モデル幾田佳; 大津天斗; 浅井歩; 行方宏介; 柴田一成日本天文学会年会講演予稿集, 2024
- Starspot mapping and multi-wavelength variability for a young solar-type star幾田佳; 行方宏介; 前原裕之; AIRAPETIAN Vladimir; PETIT Pascal; 野津湧太; 柴田一成日本天文学会年会講演予稿集, 2024
- データ科学による恒星表面マッピング幾田佳; 森万由子; 福井暁彦; 成田憲保; 行方宏介; 前原裕之; 野津湧太; 本田敏志; 野上大作; 柴田一成日本天文学会年会講演予稿集, 2023
- Starspot mapping with parallel tempering for M-dwarf flare starsIkuta Kai; Maehara Hiroyuki; Notsu Yuta; Namekata Kosuke; Kato Taichi; Okamoto Soshi; Notsu Shota23 Jul. 2021
- Blue asymmetries in Balmer lines during mid M dwarf flaresYuta Notsu; Adam F. Kowalski; Hiroyuki Maehara; Kosuke Namekata; Satoshi Honda; Teruaki Enoto; Kenji Hamaguchi; Isaiah Tristan; Suzanne L. Hawley; James R. A. Davenport; Soshi Okamoto; Kai Ikuta; Daisaku Nogami; Kazunari Shibata23 Jul. 2021
- Statistical Properties of Superflares on Solar-type Stars: Results Using All of the Kepler Primary Mission DataSoshi Okamoto; Yuta Notsu; Hiroyuki Maehara; Kosuke Namekata; Kai Ikuta; Daisaku Nogami; Kazunari Shibata26 Feb. 2021
- Detection of mass ejection from a superflare on a solar-type starKosuke Namekata; Hiroyuki Maehara; Satoshi Honda; Yuta Notsu; Soshi Okamoto; Jun Takahashi; Masaki Takayama; Tomohito Ohshima; Tomoki Saito; Noriyuki Katoh; Miyako Tozuka; Katsuhiro Murata; Futa Ogawa; Masafumi Niwano; Ryo Adachi; Motoki Oeda; Kazuki Shiraishi; Keisuke Isogai; Takako Ishii; Kiyoshi Ichimoto; Daisaku Nogami; Kazunari Shibata26 Feb. 2021
- Blue asymmetries in Balmer lines during mid M dwarf flaresYuta Notsu; Adam F. Kowalski; Hiroyuki Maehara; Kosuke Namekata; Satoshi Honda; Teruaki Enoto; Kenji Hamaguchi; Isaiah Tristan; Suzanne L. Hawley; James R. A. Davenport; Soshi Okamoto; Kai Ikuta; Daisaku Nogami; Kazunari Shibata25 Feb. 2021
- Starspot mapping with parallel tempering for TESS data of M-type flare stars幾田佳; 前原裕之; 野津湧太; 行方宏介; 加藤太一; 岡本壮師; 野津翔太; 本田敏志; 野上大作; 柴田一成日本天文学会年会講演予稿集, 2021
- Starspot mapping with parallel tempering for TESS data of M-type flare stars. II. The variation of light curves in two years幾田佳; 前原裕之; 野津湧太; 野津湧太; 行方宏介; 岡本壮師; 本田敏志; 野上大作; 柴田一成日本天文学会年会講演予稿集, 2021
- Statistical Study of Solar White-light Flares and Comparison with Superflares on Solar-type StarsKosuke Namekata; Takahito Sakaue; Kyoko Watanabe; Ayumi Asai; Hiroyuki Maehara; Yuta Notsu; Shota Notsu; Satoshi Honda; Takako T. Ishii; Kai Ikuta; Daisaku Nogami; Kazunari ShibataProceedings of the International Astronomical Union, Feb. 2018
- High Dispersion Spectroscopy Of Solar-Type Superflare Stars With Subaru/HdsYuta Notsu; Satoshi Honda; Hiroyuki Maehara; Shota Notsu; Takuya Shibayama; Kosuke Namekata; Daisaku Nogami; Kazunari ShibataZenodo, 24 Jul. 2016
- Statistical Properties Of Superflares On Solar-Type Stars With Kepler DataYuta Notsu; Hiroyuki Maehara; Takuya Shibayama; Satoshi Honda; Shota Notsu; Kosuke Namekata; Daisaku Nogami; Kazunari ShibataZenodo, 24 Jul. 2016
- Time Resolved Spectroscopic Observations Of An M-Dwarf Flare Star Ev Lac During A Flare.Satoshi Honda; Yuta Notsu; Shota Notsu; Hiroyuki Maehara; Kosuke Namekata; Daisaku Nogami; Kazunari ShibataZenodo, 22 Jul. 2016
Awards
- 17 Mar. 2021京都大学総長賞
- 10 Oct. 2022U30 Doctoral Scientist/Student Award 2022（AAPPS-DPP）
- 31 May 2017Outstanding Student Presentation Award（JpGU-AGU）
Media Coverage
External funds: Kakenhi
- Comparative Study of Solar and Stellar Magnetic Activity for Understanding of Space Weather of ExoplanetsGrant-in-Aid for Scientific Research (B)Basic Section 16010:Astronomy-relatedDoshisha University柴田 一成From 01 Apr. 2024, To 31 Mar. 2027, Granted恒星フレア;系外惑星;黒点;質量噴出;磁気活動
- Unified Understanding of Stellar Superflares from Onset to Consequences by ObservationGrant-in-Aid for Scientific Research (A)Medium-sized Section 16:Astronomy and related fieldsKyoto University野上 大作From 01 Apr. 2024, To 31 Mar. 2027, Granted恒星磁気活動性;分光器開発;黒点;スーパーフレア;質量放出
