Member

FUJII, Yuka Associate Professor National Astronomical Observatory of Japan Office: Main building (South)-312 E-mail: HP:
Research Field Exoplanet・Planetary Atmosphere Current Research My research goal is to understand the properties of small exoplanets, and putting Earth and Solar System into a context. A particular interest is in studying the surface environment of Earth-like planets, including the assessment of the possibility of life. Characterizing these small planets is challenging, because their faint signal is easily buried in its orders-of-magnitude brighter host star and, even if it is detected, interpretation of the data is not straightforward. I explore observable signatures of exoplanet atmospheres/surfaces that provide clues to the nature of the exoplanets, by modeling the atmospheric structures, simulating the spectral/photometric signatures, and evaluating the detectability. Representative Publications 1. C. Seo, Y. Ito, Y. Fujii (2024) Astrophysical Journal, Volume 975, Issue 1, id.14, "Role of Magma Oceans in Controlling Carbon and Oxygen of Sub-Neptune Atmospheres" 2. Y. Fujii, D. Angerhausen, R. Deitrick, S. Domagal-Goldman, J. L. Grenfell, Y. Hori, S. R. Kane, E. Palle, H. Rauer, N. Siegler, K. Stapelfeldt, K. B. Stevenson (2018) Astrobiology, 18(6), pp.739-778, "Exoplanet Biosignatures: Observational Prospects" 3. Y. Fujii, A. D. Del Genio, D. S. Amundsen (2017) , ApJ, 848(2), article id. 100, "NIR-Driven Moist Upper Atmospheres of Synchronously Rotating Temperate Terrestrial Exoplanets"

FUJII, Yuka

Associate Professor
National Astronomical Observatory of Japan

Office: Main building (South)-312
E-mail:
HP:

Research Field

Exoplanet・Planetary Atmosphere

Current Research

My research goal is to understand the properties of small exoplanets, and putting Earth and Solar System into a context. A particular interest is in studying the surface environment of Earth-like planets, including the assessment of the possibility of life. Characterizing these small planets is challenging, because their faint signal is easily buried in its orders-of-magnitude brighter host star and, even if it is detected, interpretation of the data is not straightforward. I explore observable signatures of exoplanet atmospheres/surfaces that provide clues to the nature of the exoplanets, by modeling the atmospheric structures, simulating the spectral/photometric signatures, and evaluating the detectability.

Representative Publications

1. C. Seo, Y. Ito, Y. Fujii (2024) Astrophysical Journal, Volume 975, Issue 1, id.14, "Role of Magma Oceans in Controlling Carbon and Oxygen of Sub-Neptune Atmospheres"
2. Y. Fujii, D. Angerhausen, R. Deitrick, S. Domagal-Goldman, J. L. Grenfell, Y. Hori, S. R. Kane, E. Palle, H. Rauer, N. Siegler, K. Stapelfeldt, K. B. Stevenson (2018) Astrobiology, 18(6), pp.739-778, "Exoplanet Biosignatures: Observational Prospects"
3. Y. Fujii, A. D. Del Genio, D. S. Amundsen (2017) , ApJ, 848(2), article id. 100, "NIR-Driven Moist Upper Atmospheres of Synchronously Rotating Temperate Terrestrial Exoplanets"