Ohno Kazumasa 大野和正

Researcher Number	50979870
Other IDs	https://orcid.org/0000-0003-3290-6758
Affiliation (Current)	2026: 国立天文台, 科学研究部, 特任助教
Affiliation (based on the past Project Information) *help	2026: 国立天文台, 科学研究部, 特任助教 2024: 国立天文台, 科学研究部, 特任助教 2023: 国立天文台, 科学研究部, 特任研究員
Review Section/Research Field	Principal Investigator Basic Section 17010:Space and planetary sciences-related / 0204:Astronomy, earth and planetary science, and related fields
Keywords	Principal Investigator 宇宙望遠鏡 / 惑星形成論 / 系外惑星大気 / 微惑星 / 原始惑星系円盤 / 雲 / 大気 / JWST / 惑星形成 / 惑星大気 / 系外惑星

Research Projects
(2 results)
Research Products
(26 results)

雲に覆われた系外惑星大気の温度・化学構造と内部熱状態の探究Principal Investigator
- Principal Investigator
  
  大野和正
- Project Period (FY)
  2026 – 2029
- Research Category
  
  Grant-in-Aid for Early-Career Scientists
- Review Section
  
  Basic Section 17010:Space and planetary sciences-related
- Research Institution
  National Astronomical Observatory of Japan
Unveiling the Planetesimal Formation Processes by Next Generation Observations of Exoplanetary AtmospheresPrincipal Investigator
- Principal Investigator
  
  Ohno Kazumasa
- Project Period (FY)
  2023 – 2024
- Research Category
  
  Grant-in-Aid for Research Activity Start-up
- Review Section
  
  0204:Astronomy, earth and planetary science, and related fields
- Research Institution
  National Astronomical Observatory of Japan

All 2025 2024 2023

All Journal Article Presentation

[Journal Article] A Possible Metal-dominated Atmosphere below the Thick Aerosols of GJ 1214 b Suggested by Its JWST Panchromatic Transmission Spectrum2025
- Author(s)
  Ohno Kazumasa、Schlawin Everett、Bell Taylor J.、Murphy Matthew M.、Beatty Thomas G.、Welbanks Luis、Greene Thomas P.、Fortney Jonathan J.、Parmentier Vivien、Edelman Isaac R.、Mehta Nishil、Rieke Marcia J.
- Journal Title
  
  The Astrophysical Journal Letters
  
  Volume: 979 Issue: 1 Pages: L7-L7
- DOI
  10.3847/2041-8213/ada02c
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Three-dimensional dynamical evolution of cloud particle microphysics in sub-stellar atmospheres2025
- Author(s)
  Lee Elspeth K. H.、Ohno Kazumasa
- Journal Title
  
  Astronomy & Astrophysics
  
  Volume: 695 Pages: A111-A111
- DOI
  10.1051/0004-6361/202452922
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Probing Cold-to-temperate Exoplanetary Atmospheres: The Role of Water Condensation on Surface Identification with JWST2024
- Author(s)
  Huang Ziyu、Yu Xinting、Tsai Shang-Min、Moses Julianne I.、Ohno Kazumasa、Krissansen-Totton Joshua、Zhang Xi、Fortney Jonathan J.
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 975 Issue: 1 Pages: 146-146
- DOI
  10.3847/1538-4357/ad76ac
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Simultaneous retrieval of orbital phase resolved JWST/MIRI emission spectra of the hot Jupiter WASP-43b: evidence of water, ammonia, and carbon monoxide2024
- Author(s)
  Yang Jingxuan、Hammond Mark、Piette Anjali A A、Blecic Jasmina、Bell Taylor J、Irwin Patrick G J、Parmentier Vivien、Tsai Shang-Min、Barstow Joanna K、Crouzet Nicolas、Kreidberg Laura、Mendonca Joao M、Taylor Jake、Baeyens Robin、Ohno Kazumasa、Teinturier Lucas、Nixon Matthew C
- Journal Title
  
  Monthly Notices of the Royal Astronomical Society
  
  Volume: 532 Issue: 1 Pages: 460-475
- DOI
  10.1093/mnras/stae1427
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Sulfur Dioxide and Other Molecular Species in the Atmosphere of the Sub-Neptune GJ 3470 b2024
- Author(s)
  Beatty Thomas G.、Welbanks Luis、Schlawin Everett、Bell Taylor J.、Line Michael R.、Murphy Matthew、Edelman Isaac、Greene Thomas P.、Fortney Jonathan J.、Henry Gregory W.、Mukherjee Sagnick、Ohno Kazumasa、Parmentier Vivien、Rauscher Emily、Wiser Lindsey S.、Arnold Kenneth E.
- Journal Title
  
  The Astrophysical Journal Letters
  
  Volume: 970 Issue: 1 Pages: L10-L10
- DOI
  10.3847/2041-8213/ad55e9
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Photochemical Hazes in Exoplanetary Skies with Diamonds: Microphysical Modeling of Haze Composition Evolution via Chemical Vapor Deposition2024
- Author(s)
  Ohno Kazumasa
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 977 Issue: 2 Pages: 188-188
- DOI
  10.3847/1538-4357/ad8e67
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Possible Carbon Dioxide above the Thick Aerosols of GJ 1214 b2024
- Author(s)
  Schlawin Everett、Ohno Kazumasa、Bell Taylor J.、Murphy Matthew M.、Welbanks Luis、Beatty Thomas G.、Greene Thomas P.、Fortney Jonathan J.、Parmentier Vivien、Edelman Isaac R.、Gill Samuel、Anderson David R.、Wheatley Peter J.、Henry Gregory W.、Mehta Nishil、Kreidberg Laura、Rieke Marcia J.
- Journal Title
  
  The Astrophysical Journal Letters
  
  Volume: 974 Issue: 2 Pages: L33-L33
- DOI
  10.3847/2041-8213/ad7fef
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Multiple Clues for Dayside Aerosols and Temperature Gradients in WASP-69 b from a Panchromatic JWST Emission Spectrum2024
- Author(s)
  Schlawin Everett、Mukherjee Sagnick、Ohno Kazumasa、Bell Taylor J.、Beatty Thomas G.、Greene Thomas P.、Line Michael、Challener Ryan C.、Parmentier Vivien、Fortney Jonathan J.、Rauscher Emily、Wiser Lindsey、Welbanks Luis、Murphy Matthew、Edelman Isaac、Batalha Natasha、Moran Sarah E.、Mehta Nishil、Rieke Marcia
- Journal Title
  
  The Astronomical Journal
  
  Volume: 168 Issue: 3 Pages: 104-104
- DOI
  10.3847/1538-3881/ad58e0
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] A high internal heat flux and large core in a warm Neptune exoplanet2024
- Author(s)
  Welbanks Luis、Bell Taylor J.、Beatty Thomas G.、Line Michael R.、Ohno Kazumasa、Fortney Jonathan J.、Schlawin Everett、Greene Thomas P.、Rauscher Emily、McGill Peter、Murphy Matthew、Parmentier Vivien、Tang Yao、Edelman Isaac、Mukherjee Sagnick、Wiser Lindsey S.、Lagage Pierre-Olivier、Dyrek Achrene、Arnold Kenneth E.
- Journal Title
  
  Nature
  
  Volume: 630 Issue: 8018 Pages: 836-840
- DOI
  10.1038/s41586-024-07514-w
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] The HUSTLE Program: The UV to Near-infrared HST WFC3/UVIS G280 Transmission Spectrum of WASP-127b2024
- Author(s)
  Boehm V. A.、Lewis N. K.、Fairman C. E.、Moran S. E.、Gascon C.、Wakeford H. R.、Alam M. K.、Alderson L.、Barstow J.、Batalha N. E.、Grant D.、Lopez-Morales M.、MacDonald R. J.、Marley Mark S.、Ohno K.
- Journal Title
  
  The Astronomical Journal
  
  Volume: 169 Issue: 1 Pages: 23-23
- DOI
  10.3847/1538-3881/ad8dde
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Stability and Detectability of Exomoons Orbiting HIP 41378 f, a Temperate Jovian Planet with an Anomalously Low Apparent Density2023
- Author(s)
  Harada Caleb K.、Dressing Courtney D.、Alam Munazza K.、.., Kazumasa Ohno., et al.
- Journal Title
  
  The Astronomical Journal
  
  Volume: 166 Issue: 5 Pages: 208-208
- DOI
  10.3847/1538-3881/ad011c
- Open Access
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Methane throughout the atmosphere of the warm exoplanet WASP-80b2023
- Author(s)
  Bell Taylor J.、Welbanks Luis、Schlawin Everett、Line Michael R.、Fortney Jonathan J.、Greene Thomas P.、Ohno Kazumasa、Parmentier Vivien、Rauscher Emily、Beatty Thomas G.、Mukherjee Sagnick、Wiser Lindsey S.、Boyer Martha L.、Rieke Marcia J.、Stansberry John A.
- Journal Title
  
  Nature
  
  Volume: 623 Issue: 7988 Pages: 709-712
- DOI
  10.1038/s41586-023-06687-0
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Nitrogen as a Tracer of Giant Planet Formation. II. Comprehensive Study of Nitrogen Photochemistry and Implications for Observing NH<sub>3</sub> and HCN in Transmission and Emission Spectra2023
- Author(s)
  Ohno Kazumasa、Fortney Jonathan J.
- Journal Title
  
  The Astrophysical Journal
  
  Volume: 956 Issue: 2 Pages: 125-125
- DOI
  10.3847/1538-4357/ace531
- Open Access
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] A broadband thermal emission spectrum of the ultra-hot Jupiter WASP-18b2023
- Author(s)
  Coulombe Louis-Philippe、Benneke Bjorn、Challener Ryan、.., Kazumasa Ohno., et al.
- Journal Title
  
  Nature
  
  Volume: 620 Issue: 7973 Pages: 292-298
- DOI
  10.1038/s41586-023-06230-1
- Open Access
- Data Source
  KAKENHI-PROJECT-23K19072
[Journal Article] Photochemically produced SO2 in the atmosphere of WASP-39b2023
- Author(s)
  Tsai Shang-Min、Lee Elspeth K. H.、Powell Diana、.., Kazumasa Ohno., et al.
- Journal Title
  
  Nature
  
  Volume: 617 Issue: 7961 Pages: 483-487
- DOI
  10.1038/s41586-023-05902-2
- Open Access
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] JWSTにより見えてきた系外惑星大気の物理・化学的性質と惑星形成との関係2025
- Author(s)
  大野和正
- Organizer
  学術変革領域研究 (A)「次世代アストロケミストリー：素過程理解に基づく学理の再構築」全体集会 2025
- Invited
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] JWST/NIRSpec Transmission Spectrum of the Hazy Sub-Neptune GJ1214 b2024
- Author(s)
  Kazumasa Ohno
- Organizer
  Extreme Solar System V
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] JWSTによる高温系外ガス惑星WASP-69bの熱放射光スペクトル観測：大気金属量、熱輸送、そして雲組成への示唆2024
- Author(s)
  大野和正
- Organizer
  天文学会秋季年会
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] JWST/NIRSpec Transmission Spectrum of the Hazy Sub-Neptune GJ1214b2024
- Author(s)
  Kazumasa Ohno
- Organizer
  Exoplanets V
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] JWST-NIRSpecによる曇ったサブネプチューンGJ1214bの大気透過光分光観測2024
- Author(s)
  大野和正
- Organizer
  惑星科学会2024 秋季講演会
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] On the origin of reflective aerosol in close-in giant exoplanets: Haze composition evolution2024
- Author(s)
  Kazumasa Ohno
- Organizer
  Japan Geoscience Union Meeting 2024
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] 原始惑星系円盤C/O比分布の再検討：難揮発性有機物のドリフト及び燃焼の影響2023
- Author(s)
  大野和正
- Organizer
  日本惑星科学会秋季講演会
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] Protosolar disk shadow may explain the hyper volatile enrichment in Jupiter’s atmosphere2023
- Author(s)
  Kazumasa Ohno
- Organizer
  Protostars and Planets VII
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] Linking Exoplanetary Atmospheres to Planet Formation2023
- Author(s)
  Kazumasa Ohno
- Organizer
  From Disks to Planets
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] Toward linking exoplanetary atmospheres to planet formation in the era of JWST2023
- Author(s)
  Kazumasa Ohno
- Organizer
  JpGU2023
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072
[Presentation] Cloud and Hazes in the Context of Exoplanetary Atmospheres2023
- Author(s)
  Kazumasa Ohno
- Organizer
  Blue Sky 2023
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K19072

Ohno Kazumasa 大野 和正

Research Projects

Research Products

雲に覆われた系外惑星大気の温度・化学構造と内部熱状態の探究Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Unveiling the Planetesimal Formation Processes by Next Generation Observations of Exoplanetary AtmospheresPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

[Journal Article] A Possible Metal-dominated Atmosphere below the Thick Aerosols of GJ 1214 b Suggested by Its JWST Panchromatic Transmission Spectrum2025

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Three-dimensional dynamical evolution of cloud particle microphysics in sub-stellar atmospheres2025

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Probing Cold-to-temperate Exoplanetary Atmospheres: The Role of Water Condensation on Surface Identification with JWST2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Simultaneous retrieval of orbital phase resolved JWST/MIRI emission spectra of the hot Jupiter WASP-43b: evidence of water, ammonia, and carbon monoxide2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Sulfur Dioxide and Other Molecular Species in the Atmosphere of the Sub-Neptune GJ 3470 b2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Photochemical Hazes in Exoplanetary Skies with Diamonds: Microphysical Modeling of Haze Composition Evolution via Chemical Vapor Deposition2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Possible Carbon Dioxide above the Thick Aerosols of GJ 1214 b2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Multiple Clues for Dayside Aerosols and Temperature Gradients in WASP-69 b from a Panchromatic JWST Emission Spectrum2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] A high internal heat flux and large core in a warm Neptune exoplanet2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] The HUSTLE Program: The UV to Near-infrared HST WFC3/UVIS G280 Transmission Spectrum of WASP-127b2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Stability and Detectability of Exomoons Orbiting HIP 41378 f, a Temperate Jovian Planet with an Anomalously Low Apparent Density2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Methane throughout the atmosphere of the warm exoplanet WASP-80b2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Nitrogen as a Tracer of Giant Planet Formation. II. Comprehensive Study of Nitrogen Photochemistry and Implications for Observing NH<sub>3</sub> and HCN in Transmission and Emission Spectra2023

Author(s)

Journal Title

DOI

Data Source

Ohno Kazumasa 大野和正