Kawahara Hajime 河原創

Researcher Number	90649758
Other IDs	https://orcid.org/0000-0003-3309-9134
Affiliation (Current)	2024: 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 准教授
Affiliation (based on the past Project Information) *help	2022 – 2024: 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 准教授 2016 – 2022: 東京大学, 大学院理学系研究科(理学部), 助教 2020: 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 准教授 2016: 東京大学, 大学院理学系研究科, 助教 2013 – 2015: 東京大学, 理学(系)研究科(研究院), 助教
Review Section/Research Field	Principal Investigator Medium-sized Section 16:Astronomy and related fields / Astronomy Except Principal Investigator Basic Section 16010:Astronomy-related / Broad Section B / Astronomy
Keywords	Principal Investigator 系外惑星 / 惑星大気 / 高分散分光 / 長周期惑星 / 太陽系外惑星 / 系外惑星大気 / 宇宙生物学 / 系外惑星キャラクタリゼーション / 直接撮像 / キャラクタリゼーション … More / トランジット系外惑星 / 大フォーマット検出器 / 超小型衛星 / 惑星形成論 / 系外惑星探査 / リトリーバル / スペクトル / Kバンド / 褐色矮星 / 自動微分 / ベイズ推定 / 高分散スペクトル / 重力波解析 / 自己重力レンズ / 超新星爆発 / 重力波 / 時間周波数解析 / 酸化チタン / 重力レンズ / 惑星マッピング / 高分散コロナグラフ / 惑星形成 / 恒星惑星相互作用 / 大気散逸 / 高コントラスト装置 / コロナグラフ / 天文光学 / 地球型惑星 / ケプラー衛星 / 雪線 / トランジット惑星 … More Except Principal Investigator 太陽系外惑星 / ガスセル / 高分散分光 / spectroscopy / interferometry / photonics / exoplanet / wavefront control / adaptive optics / Telescopes / Adaptive Optics / Telescope / Coronagraphy / Spectroscopy / Optical Fiber / Photonic / Exoplanets / Interferometry / Exoplanet / Astronomy / 星震学 / 大循環モデル / 三体問題 / バイオシグニチャー / 天体力学 / 大気大循環モデル / リモートセンシング / 系外惑星 / 高効率 / 空間分解能 / フーリエ分光器 / 高分散分光器 / 高分散 Less

マルチジェネレーション衛星で探る長周期系外惑星の普遍性解明のための検出器開発Principal Investigator
- Principal Investigator
  
  河原創
- Project Period (FY)
  2023 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Review Section
  
  Medium-sized Section 16:Astronomy and related fields
- Research Institution
  Japan Aerospace EXploration Agency
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大気探査
- Principal Investigator
  
  小谷隆行
- Project Period (FY)
  2023 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 16010:Astronomy-related
- Research Institution
  National Institutes of Natural Sciences
Mapping Habitable Planetary Environments with Exoplanet Imaging
- Principal Investigator
  
  Guyon Olivier
- Project Period (FY)
  2021 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (S)
- Review Section
  
  Broad Section B
- Research Institution
  National Astronomical Observatory of Japan
Exploring Exoplanet Atmospheres with High Dispersion CoronagraphsPrincipal Investigator
- Principal Investigator
  
  Kawahara Hajime
- Project Period (FY)
  2020 – 2022
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Review Section
  
  Medium-sized Section 16:Astronomy and related fields
- Research Institution
  Japan Aerospace EXploration Agency
  The University of Tokyo
新しい重力波の時間周波数解析法で探る超新星爆発メカニズムPrincipal Investigator
- Principal Investigator
  
  河原創
- Project Period (FY)
  2018 – 2019
- Research Category
  
  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
- Research Institution
  The University of Tokyo
系外惑星の軌道・表層進化とそのリモートセンシングへの応用
- Principal Investigator
  
  須藤靖
- Project Period (FY)
  2018 – 2022
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 16010:Astronomy-related
- Research Institution
  The University of Tokyo
Exoplanet Exploration and Characterization in a Cool WorldPrincipal Investigator
- Principal Investigator
  
  Kawahara Hajime
- Project Period (FY)
  2017 – 2020
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Astronomy
- Research Institution
  The University of Tokyo
Development of a new high-dispersion spectrometer for unveiling exoplanet atmosphere
- Principal Investigator
  
  Kotani Takayuki
- Project Period (FY)
  2015 – 2016
- Research Category
  
  Grant-in-Aid for Challenging Exploratory Research
- Research Field
  
  Astronomy
- Research Institution
  National Astronomical Observatory of Japan
Developing Remote Sensing Methods for Characterization of ExoplanetsPrincipal Investigator
- Principal Investigator
  
  Kawahara Hajime
- Project Period (FY)
  2013 – 2016
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Astronomy
- Research Institution
  The University of Tokyo

All 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 Other

All Journal Article Presentation Book

[Book] 系外惑星探査2018
- Author(s)
  河原創
- Total Pages
  288
- Publisher
  東京大学出版会
- ISBN
- Data Source
  KAKENHI-PROJECT-17K14246
[Journal Article] Fast optical flares from M?dwarfs detected by a one-second-cadence survey with Tomo-e Gozen2022
- Author(s)
  Aizawa Masataka、Kawana Kojiro、Kashiyama Kazumi (+Kotaro Fujisawa) et al.
- Journal Title
  
  Publications of the Astronomical Society of Japan
  
  Volume: 74 Issue: 5 Pages: 1069-1094
- DOI
  10.1093/pasj/psac056
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14512, KAKENHI-PROJECT-18H05223, KAKENHI-PROJECT-20H00170, KAKENHI-PROJECT-21H04491, KAKENHI-PROJECT-20K04010, KAKENHI-PROJECT-18H01261, KAKENHI-PROJECT-18H01247, KAKENHI-PROJECT-20H01904
[Journal Article] Dippers from TESS Full-frame Images. II. Spectroscopic Characterization of Four Young Dippers2022
- Author(s)
  Kasagi Yui、Kotani Takayuki、Kawahara Hajime、Tajiri Tomoyuki、Muto Takayuki、Aizawa Masataka、Fujii Michiko S.、Hattori Kohei、Masuda Kento、Momose Munetake、Ohsawa Ryou、Takita Satoshi
- Journal Title
  
  The Astrophysical Journal Supplement Series
  
  Volume: 259 Issue: 2 Pages: 40-40
- DOI
  10.3847/1538-4365/ac4e8b
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00170, KAKENHI-PROJECT-17H01103, KAKENHI-PROJECT-18H01247
[Journal Article] A super-Earth orbiting near the inner edge of the habitable zone around the M4.5 dwarf Ross 5082022
- Author(s)
  Harakawa Hiroki、Takarada Takuya、Kasagi Yui、Hirano Teruyuki、et al.
- Journal Title
  
  Publications of the Astronomical Society of Japan
  
  Volume: 74 Issue: 4 Pages: 904-922
- DOI
  10.1093/pasj/psac044
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14783, KAKENHI-PLANNED-20H05893, KAKENHI-PROJECT-20H00170, KAKENHI-PROJECT-19K14775, KAKENHI-PROJECT-21K20388, KAKENHI-PROJECT-18H01247
[Journal Article] Images of embedded Jovian planet formation at a wide separation around AB Aurigae2022
- Author(s)
  Currie T., Lawson K., Schneider G., Lyra W., Wisniewski J., Grady C., Guyon O., Tamura M., Kotani T., Kawahara H., Brandt T., Uyama T., Muto T., Dong R., Kudo T., Hashimoto J., Fukagawa M., Wagner K., Lozi J., Chilcote J., Tobin T., Groff T., Ward-Duong K., Januszewski W., Norris B., Tuthill P., et al.
- Journal Title
  
  Nature Astronomy
  
  Volume: 6 Issue: 6 Pages: 751-759
- DOI
  10.1038/s41550-022-01634-x
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21H04998, KAKENHI-PROJECT-20H00170, KAKENHI-PROJECT-22KJ3093, KAKENHI-PROJECT-17H01103, KAKENHI-PROJECT-19H00703, KAKENHI-PROJECT-18H01247
[Journal Article] Global Mapping of Surface Composition on an Exo-Earth Using Sparse Modeling2022
- Author(s)
  Kuwata Atsuki、Kawahara Hajime、Aizawa Masataka、Kotani Takayuki、Tamura Motohide
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 930 Issue: 2 Pages: 162-162
- DOI
  10.3847/1538-4357/ac64a1
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-20H00170, KAKENHI-PROJECT-18H01247
[Journal Article] Polarization-based Speckle Nulling Using a Spatial Light Modulator to Generate a Wide-field Dark Hole2022
- Author(s)
  Naoshi Murakami, Kenta Yoneta, Kenya Kawai, Hajime Kawahara, Takayuki Kotani, Motohide Tamura, and Naoshi Baba
- Journal Title
  
  Astronomical Journal
  
  Volume: 163 Issue: 3 Pages: 129-129
- DOI
  10.3847/1538-3881/ac3510
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19K22137, KAKENHI-PUBLICLY-21H05579, KAKENHI-PROJECT-20H00170, KAKENHI-PROJECT-19H01932, KAKENHI-PROJECT-18H01247, KAKENHI-PLANNED-18H05442
[Journal Article] Autodifferentiable Spectrum Model for High-dispersion Characterization of Exoplanets and Brown Dwarfs2022
- Author(s)
  Kawahara Hajime、Kawashima Yui、Masuda Kento、Crossfield Ian J. M.、Pannier Erwan、van den Bekerom Dirk
- Journal Title
  
  The Astrophysical Journal Supplement Series
  
  Volume: 258 Issue: 2 Pages: 31-31
- DOI
  10.3847/1538-4365/ac3b4d
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00170, KAKENHI-PROJECT-21K13984, KAKENHI-PROJECT-21H04998, KAKENHI-PROJECT-18H01247
[Journal Article] Neutral Metals in the Atmosphere of HD 149026b2021
- Author(s)
  Ishizuka Masato、Kawahara Hajime、Nugroho Stevanus K.、Kawashima Yui、Hirano Teruyuki、Tamura Motohide
- Journal Title
  
  The Astronomical Journal
  
  Volume: 161 Issue: 4 Pages: 153-153
- DOI
  10.3847/1538-3881/abdb25
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19J11805, KAKENHI-PROJECT-20H00170, KAKENHI-PLANNED-18H05442
[Journal Article] First Detection of Hydroxyl Radical Emission from an Exoplanet Atmosphere: High-dispersion Characterization of WASP-33b Using Subaru/IRD2021
- Author(s)
  Nugroho Stevanus K.、Kawahara Hajime、Gibson Neale P.、de Mooij Ernst J. W.、Hirano Teruyuki、et al.
- Journal Title
  
  The Astrophysical Journal Letters
  
  Volume: 910 Issue: 1 Pages: L9-L9
- DOI
  10.3847/2041-8213/abec71
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14783, KAKENHI-PROJECT-19J11805, KAKENHI-PLANNED-20H05893, KAKENHI-PLANNED-18H05442, KAKENHI-PROJECT-20H00170
[Journal Article] Global Mapping of an Exo-Earth using Sparse Modeling2020
- Author(s)
  Masataka Aizawa, Hajime Kawahara, Siteng Fan
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 896 Issue: 1 Pages: 1-1
- DOI
  10.3847/1538-4357/ab8d30
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246, KAKENHI-PROJECT-20H00170
[Journal Article] Mutual Orbital Inclinations between Cold Jupiters and Inner Super-Earths2020
- Author(s)
  Masuda Kento、Winn Joshua N.、Kawahara Hajime
- Journal Title
  
  The Astronomical Journal
  
  Volume: 159 Issue: 2 Pages: 38-38
- DOI
  10.3847/1538-3881/ab5c1d
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246
[Journal Article] Bayesian Dynamic Mapping of an Exo-Earth from Photometric Variability2020
- Author(s)
  Kawahara Hajime、Masuda Kento
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 900 Issue: 1 Pages: 48-48
- DOI
  10.3847/1538-4357/aba95e
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20H00170
[Journal Article] Dippers from the TESS Full-frame Images. I. Results of the First One Year Data and Discovery of a Runaway Dipper2020
- Author(s)
  Tajiri Tomoyuki、Kawahara Hajime、Aizawa Masataka、Fujii Michiko S.、Hattori Kohei、Kasagi Yui、Kotani Takayuki、Masuda Kento、Momose Munetake、Muto Takayuki、Ohsawa Ryou、Takita Satoshi
- Journal Title
  
  The Astrophysical Journal Supplement Series
  
  Volume: 251 Issue: 2 Pages: 18-18
- DOI
  10.3847/1538-4365/abbc17
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19K03932, KAKENHI-PLANNED-18H05441, KAKENHI-PROJECT-17H01103, KAKENHI-PLANNED-18H05442, KAKENHI-PROJECT-20H00170
[Journal Article] Detection of Fe i Emission in the Dayside Spectrum of WASP-33b2020
- Author(s)
  Nugroho Stevanus K.、Gibson Neale P.、de Mooij Ernst J. W.、Herman Miranda K.、Watson Chris A.、Kawahara Hajime、Merritt Stephanie R.
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 898 Issue: 2 Pages: L31-L31
- DOI
  10.3847/2041-8213/aba4b6
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20H00170
[Journal Article] Global Mapping of the Surface Composition on an Exo-Earth Using Color Variability2020
- Author(s)
  Kawahara Hajime
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 894 Issue: 1 Pages: 58-58
- DOI
  10.3847/1538-4357/ab87a1
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246, KAKENHI-PROJECT-20H00170
[Journal Article] Obliquity of an Earth-like Planet from Frequency Modulation of Its Direct-imaged Lightcurve: Mock Analysis from General Circulation Model Simulation2020
- Author(s)
  Nakagawa Yuta、Kodama Takanori、Ishiwatari Masaki、Kawahara Hajime、Suto Yasushi、Takahashi Yoshiyuki O.、Hashimoto George L.、Kuramoto Kiyoshi、Nakajima Kensuke、Takehiro Shin-ichi、Hayashi Yoshi-Yuki
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 898 Issue: 2 Pages: 95-95
- DOI
  10.3847/1538-4357/ab9eb8
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-18H01247, KAKENHI-PROJECT-19H01947, KAKENHI-PLANNED-17H06457, KAKENHI-PROJECT-20H00170
[Journal Article] Transiting Planets Near the Snow Line from Kepler. I. Catalog2019
- Author(s)
  Kawahara Hajime、Masuda Kento
- Journal Title
  
  The Astronomical Journal
  
  Volume: 157 Issue: 6 Pages: 218-218
- DOI
  10.3847/1538-3881/ab18ab
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04577, KAKENHI-PROJECT-17K14246
[Journal Article] Self-lensing Discovery of a 0.2 M White Dwarf in an Unusually Wide Orbit around a Sun-like Star2019
- Author(s)
  Masuda Kento、Kawahara Hajime、Latham David W.、Bieryla Allyson、Kunitomo Masanobu、MacLeod Morgan、Aoki Wako
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 881 Issue: 1 Pages: L3-L3
- DOI
  10.3847/2041-8213/ab321b
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04577, KAKENHI-PROJECT-17K14246
[Journal Article] Transiting Planets near the Snow Line from Kepler. I. Catalog2019
- Author(s)
  Kawahara and Masuda
- Journal Title
  
  The Astronomical Journal
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PUBLICLY-18H04577
[Journal Article] Transiting Planets near the Snow Line from Kepler. I. Catalog2019
- Author(s)
  Kawahara and Masuda
- Journal Title
  
  The Astronomical Journal
  
  Volume: 印刷中
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17K14246
[Journal Article] A Linear and Quadratic Time-Frequency Analysis of Gravitational Waves from Core-Collapse Supernovae2018
- Author(s)
  Hajime Kawahara, Takami Kuroda, Tomoya Takiwaki, Kazuhiro Hayama, Kei Kotake
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 867 Issue: 2 Pages: 126-126
- DOI
  10.3847/1538-4357/aae57b
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246, KAKENHI-PROJECT-17K14306, KAKENHI-PUBLICLY-17H05206, KAKENHI-PLANNED-17H06364, KAKENHI-PUBLICLY-18H04577, KAKENHI-PROJECT-17H01130, KAKENHI-PROJECT-18H01247, KAKENHI-PROJECT-15KK0173
[Journal Article] X-ray study of the double radio relic Abell 3376 with Suzaku2018
- Author(s)
  I. Urdampilleta, H. Akamatsu, F. Mernier, J. S. Kaastra, J. de Plaa, T. Ohashi, Y. Ishisaki, H. Kawahara
- Journal Title
  
  Astronomy and Astrophysics
  
  Volume: 618 Pages: A74-A74
- DOI
  10.1051/0004-6361/201732496
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246, KAKENHI-PUBLICLY-18H04577
[Journal Article] Systematic Search for Rings around Kepler Planet Candidates: Constraints on Ring Size and Occurrence Rate2018
- Author(s)
  Masataka Aizawa, Kento Masuda, Hajime Kawahara, Yasushi Suto
- Journal Title
  
  the Astronomical Journal
  
  Volume: 155 Issue: 5 Pages: 206-206
- DOI
  10.3847/1538-3881/aab9a1
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246, KAKENHI-PROJECT-18H01247, KAKENHI-PROJECT-17J04200
[Journal Article] Discovery of three self-lensing binaries from Kepler2018
- Author(s)
  Hajime Kawahara, Kento Masuda, Morgan MacLeod, David W. Latham, Allyson Bieryla, Othman Benomar
- Journal Title
  
  the Astronomical Journal
  
  Volume: 155 Issue: 3 Pages: 144-144
- DOI
  10.3847/1538-3881/aaaaaf
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246, KAKENHI-PROJECT-26220704
[Journal Article] Back to “Normal” for the Disintegrating Planet Candidate KIC 12557548 b2018
- Author(s)
  Schlawin Everett、Hirano Teruyuki、Kawahara Hajima、Teske Johanna、Green Elizabeth M.、Rackham Benjamin V.、Fraine Jonathan、Bushra Rafia
- Journal Title
  
  The Astronomical Journal
  
  Volume: 156 Issue: 6 Pages: 281-281
- DOI
  10.3847/1538-3881/aaeb32
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17660, KAKENHI-PROJECT-17K14246, KAKENHI-PUBLICLY-18H04577
[Journal Article] High-resolution Spectroscopic Detection of TiO and a Stratosphere in the Day-side of WASP-33b2017
- Author(s)
  Nugroho, S. K., Kawahara, H., Masuda, K., Hirano, T., Kotani, T., Tajitsu, A.
- Journal Title
  
  The Astronomical Journal
  
  Volume: 154 Issue: 6 Pages: 221-221
- DOI
  10.3847/1538-3881/aa9433
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17660, KAKENHI-PROJECT-17K14246, KAKENHI-PROJECT-26220704
[Journal Article] Suzaku and Chandra observations of the galaxy cluster RXC J1053.7+5453 with a radio relic2017
- Author(s)
  Itahana Madoka、Takizawa Motokazu、Akamatsu Hiroki、van Weeren Reinout J.、Kawahara Hajime、Fukazawa Yasushi、Kaastra Jelle S.、Nakazawa Kazuhiro、Ohashi Takaya、Ota Naomi、Roettgering Huub J. A.、Vink Jacco、Zandanel Fabio
- Journal Title
  
  Publications of the Astronomical Society of Japan
  
  Volume: 69 Issue: 6 Pages: 88-88
- DOI
  10.1093/pasj/psx095
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K05295, KAKENHI-PROJECT-17K14246, KAKENHI-PROJECT-26400218
[Journal Article] Suzaku observations of the merging galaxy cluster Abell2255: The northeast radio relic2017
- Author(s)
  H. Akamatsu, M. Mizuno, N. Ota, Y.-Y. Zhang, R. J. van Weeren, H. Kawahara, Y. Fukazawa, J. S. Kaastra, M. Kawaharada, K. Nakazawa, T. Ohashi, H.J.A. Rottgering, M. Takizawa, J. Vink, F. Zandanel
- Journal Title
  
  Astronomy and Astrophysics
  
  Volume: 600 Pages: 100-100
- DOI
  10.1051/0004-6361/201628400
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25800106, KAKENHI-PROJECT-16K05295, KAKENHI-PROJECT-26400218
[Journal Article] Frequency Modulation ofDirectly Imaged Exoplanets: Geometric Effect as a Probe of Planetary Obliquity2016
- Author(s)
  Hajime Kawahara
- Journal Title
  
  Astrophysical Journal
  
  Volume: 印刷中
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-25800106
[Journal Article] Frequency Modulation of Directly Imaged Exoplanets: Geometric Effect as a Probe of Planetary Obliquity2016
- Author(s)
  Hajime Kawahara
- Journal Title
  
  Astrophysical Journal
  
  Volume: 822 Issue: 2 Pages: 112-112
- DOI
  10.3847/0004-637x/822/2/112
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-25800106
[Journal Article] Transiting Planet Candidates Beyond the Snow Line Detected by Visual Inspection of 7557 Kepler Objects of Interest2016
- Author(s)
  Uehara, S., Kawahara, H., Masuda, K., Yamada, S., Aizawa, M.
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 822 Issue: 1 Pages: 2-2
- DOI
  10.3847/0004-637x/822/1/2
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-14J07182, KAKENHI-PROJECT-25800106
[Journal Article] Lifetime and Spectral Evolution of a Magma Ocean with a Steam Atmosphere: Its Detectability by Future direct Imaging2015
- Author(s)
  Keiko Hamano, Hajime Kawahara, Yutaka Abe, Masanori Onishi, George L. Hashimoto
- Journal Title
  
  Astrophysical Journal
  
  Volume: 806 Issue: 2 Pages: 216-216
- DOI
  10.1088/0004-637x/806/2/216
- Peer Reviewed / Acknowledgement Compliant / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25800106, KAKENHI-PROJECT-25800264, KAKENHI-PROJECT-26800242, KAKENHI-ORGANIZER-23103001, KAKENHI-PLANNED-23103003
[Journal Article] Suzaku observations of the galaxy cluster 1RXS J0603.3+4214: Implications of particle acceleration processes in the "Toothbrush" radio relic2015
- Author(s)
  Madoka Itahana, Motokazu Takizawa, Hiroki Akamatsu, Takaya Ohashi, Yoshitaka Ishisaki, Hajime Kawahara, Reinout J. van Weeren
- Journal Title
  
  Publications of the Astronomical Society of Japan
  
  Volume: 67 Issue: 6 Pages: 113-113
- DOI
  10.1093/pasj/psv084
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26400218, KAKENHI-PROJECT-25800106, KAKENHI-PROJECT-26220703, KAKENHI-PROJECT-15H03642
[Journal Article] Theoretical Emission Spectra of Atmospheres of Hot Rocky Super-Earths2015
- Author(s)
  Ito, Y., Ikoma, M., Kawahara, H., Nagahara, H., Kawashima, Y., and Nakamoto, T.
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 801 Issue: 2 Pages: 144-144
- DOI
  10.1088/0004-637x/801/2/144
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PLANNED-23103005, KAKENHI-PROJECT-24340102, KAKENHI-PROJECT-25247026, KAKENHI-PROJECT-25400224, KAKENHI-PROJECT-25800106
[Journal Article] Suzaku X-ray study of the double radio relic galaxy cluster CIZA J2242.8+53012015
- Author(s)
  H. Akamatsu, R. J. van Weeren, G. A. Ogrean, H. Kawahara, A. Stroe, D. Sobral, M. Hoeft, H. Rottgering, M. Bruggen, J. S. Kaastra
- Journal Title
  
  Astronomy & Astrophysics
  
  Volume: 582 Pages: A87-A87
- DOI
  10.1051/0004-6361/201425209
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25800106
[Journal Article] Absolute Dimensions of a Flat Hierarchical Triple System KIC 6543674 from the Kepler Photometry2015
- Author(s)
  Kento Masuda, Sho Uehara, Hajime Kawahara
- Journal Title
  
  Astrophysical Journal Letters
  
  Volume: L37 Issue: 2 Pages: 806-806
- DOI
  10.1088/2041-8205/806/2/l37
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-25800106, KAKENHI-PROJECT-14J07182
[Journal Article] Exploring Hot Gas at Junctions of Galaxy Filaments with Suzaku2014
- Author(s)
  Ikuyuki Mitsuishi, Hajime Kawahara, Norio Sekiya, Shin Sasaki, Thierry Sousbie and Noriko Y. Yamasaki
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 783 Issue: 2 Pages: 137-148
- DOI
  10.1088/0004-637x/783/2/137
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-12J10673, KAKENHI-PROJECT-25800106
[Journal Article] Spectroscopic Coronagraphy for Planetary Radial Velocimetry of Exoplanets2014
- Author(s)
  Hajime Kawahara, Naoshi Murakami, Taro Matsuo, Takayuki Kotani
- Journal Title
  
  The Astrophysical Journal Supplement Series
  
  Volume: 212 Issue: 2 Pages: 27-27
- DOI
  10.1088/0067-0049/212/2/27
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-25800106, KAKENHI-PROJECT-26287026
[Journal Article] Starspots-Transit Depth Relation of the Evaporating Planet Candidate KIC 12557548b2013
- Author(s)
  Hajime Kawahara, Teruyuki Hirano, Kenji Kurosaki, Yuichi Ito, Masahiro Ikoma
- Journal Title
  
  The Astrophysical Journal Letters
  
  Volume: 776 Issue: 1 Pages: L6-L6
- DOI
  10.1088/2041-8205/776/1/l6
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-13J03183, KAKENHI-PLANNED-23103005, KAKENHI-PROJECT-25247026, KAKENHI-PROJECT-25400224, KAKENHI-PROJECT-25800106
[Journal Article] Probing the extreme planetary atmosphere of WASP-12b2013
- Author(s)
  Mark Swain, Pieter Deroo, Giovanna Tinetti, Morgan Hollis, Marcell Tessenyi, Michael Line , Hajime Kawahara, Yuka Fujii, Adam Showman, Sergey Yurchenko
- Journal Title
  
  Icarus
  
  Volume: 225 Issue: 1 Pages: 432-445
- DOI
  10.1016/j.icarus.2013.04.003
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-25800106
[Journal Article] Validity of Hydrostatic Equilibrium in Galaxy Clusters from Cosmological Hydrodynamical Simulations2013
- Author(s)
  Suto, Kawahara, et al.
- Journal Title
  
  Astrophysical Journal
  
  Volume: 767 Issue: 1 Pages: 79-79
- DOI
  10.1088/0004-637x/767/1/79
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-10J05467, KAKENHI-PROJECT-20340041, KAKENHI-PROJECT-25400236, KAKENHI-PROJECT-25800106
[Presentation] 系外惑星高分散リトリーバルExoJAX：広帯域化アルゴリズム2023
- Author(s)
  河原　創、他、ExoJAX contributors
- Organizer
  日本天文学会2023年春季年会
- Data Source
  KAKENHI-PROJECT-20H00170
[Presentation] 系外惑星大気探査のためのオープンソース・プロジェクト: ExoJAX2022
- Author(s)
  河原　創、他、ExoJAX contributors
- Organizer
  日本天文学会2022年秋季年会
- Data Source
  KAKENHI-PROJECT-20H00170
[Presentation] JASMINE2022
- Author(s)
  河原　創, JASMINE collaboration
- Organizer
  ISAS Astrobiology Exploration Symposium (ABEX)
- Invited
- Data Source
  KAKENHI-PROJECT-20H00170
[Presentation] 太陽系外惑星・褐色矮星の高分散キャラクタリゼーションのための自動微分可能なスペクトルモデル2021
- Author(s)
  河原創 (東大), 川島由依 (理研), 増田賢人 (大阪大), Ian J.M. Crossfield (U. Kansas)
- Organizer
  日本天文学会秋期年会
- Data Source
  KAKENHI-PROJECT-20H00170
[Presentation] Searching for Self-Gravitational Lensing by A Black Hole in TESS Full-Frame Images2019
- Author(s)
  Hajime Kawahara
- Organizer
  Joint symposium of MEXT innovative area x KONAN GAKUEN 100th Anniversary International Scientific Symposium Series Sponsored by The Hirao Taro Foundation of KONAN GAKUEN for Academic Research
- Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-18H04577
[Presentation] 超小型衛星による長周期トランジット惑星探査(LOTUS)2019
- Author(s)
  Hajime Kawahara
- Organizer
  超小型衛星利用シンポジウム
- Data Source
  KAKENHI-PROJECT-17K14246
[Presentation] High Dispersion Spectroscopy for Exoplanet Characterization2019
- Author(s)
  Hajime Kawahara
- Organizer
  Symposium on Planetary Sciences 2019 (SPS2019)
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246
[Presentation] Transiting Planets near the Snow Line2019
- Author(s)
  Hajime Kawahara
- Organizer
  From protoplanetary disks through planetary system architecture to planetary atmospheres and habitability
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246
[Presentation] High Dispersion Spectroscopy for Exoplanet Characterization2018
- Author(s)
  Hajime Kawahara
- Organizer
  Symposium on Planetary Sciences 2019 (SPS2019)
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01247
[Presentation] Transiting exoplanet survey by micro satellites2018
- Author(s)
  Hajime Kawahara
- Organizer
  Nikko Japan - Latin America Academic Conference 2018 in Nikko
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246
[Presentation] Transiting exoplanet survey by micro satellite2018
- Author(s)
  Hajime Kawahara
- Organizer
  Japan - Latin America Academic Conference 2018
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-18H01247
[Presentation] 小型衛星によって第二の太陽系発見をめざす系外惑星探査計画:LOTUS2018
- Author(s)
  Hajime Kawahara
- Organizer
  2018年度宇宙科学技術連合大会
- Invited
- Data Source
  KAKENHI-PROJECT-17K14246
[Presentation] A Linear and Quadratic Time-Frequency Analysis of Gravitational Waves from Core-Collapse Supernovae2018
- Author(s)
  Hajime Kawahara
- Organizer
  Gravitational Wave Physics and Astronomy: Genesis
- Invited
- Data Source
  KAKENHI-PUBLICLY-18H04577
[Presentation] How to find an Earth analog and a solar-system analog in the world of exoplanets2018
- Author(s)
  Hajime Kawahara
- Organizer
  JpGU 2018, B-A001 Astrobiology session
- Data Source
  KAKENHI-PROJECT-17K14246
[Presentation] Finding long period objects around snowline2017
- Author(s)
  Hajime Kawahara
- Organizer
  Planet Formation beyond Snowlines, Tokyo, Japan,
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17K14246
[Presentation] GPUライトカーブ解析で探るクールな領域の惑星2017
- Author(s)
  河原　創
- Organizer
  宇宙における生命ワークショップ
- Place of Presentation
  一橋大学一橋講堂 (東京都千代田区)
- Year and Date
  2017-03-06
- Invited
- Data Source
  KAKENHI-PROJECT-25800106
[Presentation] Transiting planets near and beyond the snow line2017
- Author(s)
  Hajime Kawahara
- Organizer
  Origin and diversity of planetary systems from the microscope to the telescope
- Place of Presentation
  Nice (France)
- Year and Date
  2017-02-20
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-25800106
[Presentation] FM Exoplanets：反射光光度曲線の周期解析2016
- Author(s)
  河原　創
- Organizer
  日本天文学会2016年春季年会
- Place of Presentation
  首都大学東京、東京都、八王子市
- Year and Date
  2016-03-14
- Data Source
  KAKENHI-PROJECT-25800106
[Presentation] 系外惑星の分光直接検出のためのSpectroscopic Coronagraph2014
- Author(s)
  河原創、村上尚史、松尾太郎、小谷隆行
- Organizer
  日本天文学会秋季年会
- Place of Presentation
  山形大学(山形県)
- Year and Date
  2014-09-12
- Data Source
  KAKENHI-PROJECT-25800106
[Presentation] Characterization of Exoplanets using Planetary Radial Velocimetry2014
- Author(s)
  Hajime Kawahara
- Organizer
  Exoclimes III
- Place of Presentation
  Davos Congress Centre (Switzerland, Davos)
- Data Source
  KAKENHI-PROJECT-25800106
[Presentation] Characterization of Exoplanets with High-contrast & High-Dispersion Instruments on Extremely Large Telescopes2014
- Author(s)
  Hajime Kawahara
- Organizer
  The 2014 German-Japanese meeting on Exo-Planets and their formation
- Place of Presentation
  Haus der Astronomie, MPI-Astronomy Campus(ドイツ)
- Year and Date
  2014-11-06
- Invited
- Data Source
  KAKENHI-PROJECT-25800106
[Presentation] Characterization of Exoplanets with High Contrast Instruments2014
- Author(s)
  Hajime Kawahara
- Organizer
  Japan Geoscience Meeting 2014
- Place of Presentation
  パシフィコ横浜(神奈川県)
- Year and Date
  2014-04-28
- Invited
- Data Source
  KAKENHI-PROJECT-25800106
[Presentation] 地球型系外惑星の探査理論2014
- Author(s)
  河原　創
- Organizer
  第27回理論懇シンポジウム
- Place of Presentation
  国立天文台(東京都)
- Year and Date
  2014-12-25
- Invited
- Data Source
  KAKENHI-PROJECT-25800106
[Presentation] Starspots - Transit Depth Relation of KIC 12557548b2013
- Author(s)
  Hajime Kawahara, Teruyuki Hirano, Kenji Kurosaki, Yuichi Ito, Masahiro Ikoma
- Organizer
  Kepler Science Conference II
- Place of Presentation
  NASA Ames center, (USA, California)
- Data Source
  KAKENHI-PROJECT-25800106
[Presentation] 系外惑星探査の進展
- Author(s)
  河原　創
- Organizer
  研究環シンポジウム：宇宙の化学進化 2014
- Place of Presentation
  首都大学東京、(東京都八王子市)
- Invited
- Data Source
  KAKENHI-PROJECT-25800106
[Presentation] 蒸発惑星のTransit Depth Variation
- Author(s)
  河原創, 平野照幸, 黒崎健二, 伊藤祐一, 生駒大洋
- Organizer
  日本天文学会秋期年会
- Place of Presentation
  東北大学、（宮城県仙台市)
- Data Source
  KAKENHI-PROJECT-25800106

1. Kotani Takayuki (40554291)

# of Collaborated Projects: 5 results

# of Collaborated Products: 3 results
2. Guyon Olivier (90399288)

# of Collaborated Projects: 2 results

# of Collaborated Products: 1 results
3. 川島由依 (40897691)

# of Collaborated Projects: 2 results

# of Collaborated Products: 0 results
4. MURAKAMI Naoshi (80450188)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
5. 須藤靖 (90183053)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
6. 石渡正樹 (90271692)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
7. 増田賢人 (20874168)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
8. 和田武彦 (50312202)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
9. 片坐宏一 (70242097)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
10. 吉岡和夫 (70637131)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
11. OTA Naonmi

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
12. 藤澤幸太郎

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
13. 滝沢元和

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
14. 平野照幸

# of Collaborated Projects: 0 results

# of Collaborated Products: 4 results
15. 中本泰史

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
16. 生駒大洋

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
17. 武藤恭之

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results

Kawahara Hajime 河原 創

Research Projects

Research Products

Co-Researchers

マルチジェネレーション衛星で探る長周期系外惑星の普遍性解明のための検出器開発Principal Investigator

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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大気探査

Principal Investigator

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Mapping Habitable Planetary Environments with Exoplanet Imaging

Principal Investigator

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Exploring Exoplanet Atmospheres with High Dispersion CoronagraphsPrincipal Investigator

Principal Investigator

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新しい重力波の時間周波数解析法で探る超新星爆発メカニズムPrincipal Investigator

Principal Investigator

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系外惑星の軌道・表層進化とそのリモートセンシングへの応用

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Exoplanet Exploration and Characterization in a Cool WorldPrincipal Investigator

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Development of a new high-dispersion spectrometer for unveiling exoplanet atmosphere

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Developing Remote Sensing Methods for Characterization of ExoplanetsPrincipal Investigator

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[Book] 系外惑星探査2018

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[Journal Article] Fast optical flares from M?dwarfs detected by a one-second-cadence survey with Tomo-e Gozen2022

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DOI

Data Source

[Journal Article] Dippers from TESS Full-frame Images. II. Spectroscopic Characterization of Four Young Dippers2022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] A super-Earth orbiting near the inner edge of the habitable zone around the M4.5 dwarf Ross 5082022

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Journal Title

DOI

Data Source

[Journal Article] Images of embedded Jovian planet formation at a wide separation around AB Aurigae2022

Author(s)

Kawahara Hajime 河原創