Takayuki Kotani

The Graduate University for Advanced Studies, SOKENDAI — Japan

Physics and Astronomy · Physical Sciences

34h-index3.9kcitations384works2.42yr avg
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Research Topics

Stellar, planetary, and galactic studies(163), Astronomy and Astrophysical Research(103), Adaptive optics and wavefront sensing(89), Astro and Planetary Science(57), Astrophysics and Star Formation Studies(57)

Publications384 total

Sibling sub-Neptunes around sibling M dwarfs: TOI-521 and TOI-912
Astronomy and Astrophysics·2025Open Access
Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby Mid-M-dwarf LSPM J1446+4633
The Astronomical Journal·2025Open Access
Direct Imaging Explorations for Companions from the Subaru/IRD Strategic Program II; Discovery of a Brown-dwarf Companion around a Nearby mid-M~dwarf LSPM~J1446+4633
arXiv (Cornell University)·2025Open Access
Unveiling the Atmosphere of HR 7672 B from the Near-infrared High-resolution Spectrum Using REACH/Subaru
The Astronomical Journal·2025· 1 citedOpen Access
The mass of TOI-654 b: A short-period sub-Neptune transiting a mid-M dwarf
Publications of the Astronomical Society of Japan·2025· 1 citedOpen Access
Unveiling the Atmosphere of HR 7672 B from the Near-Infrared High-Resolution Spectrum Using REACH/Subaru
arXiv (Cornell University)·2025Open Access
The mass of TOI-654 b: A short-period sub-Neptune transiting a mid-M dwarf
arXiv (Cornell University)·2025Open Access
Atmospheric Retrieval of Subaru/IRD High-resolution Spectrum of the Archetype T-type Brown Dwarf Gl 229 B*
The Astrophysical Journal·2025· 1 citedOpen Access
Differentiable Modeling of Planet and Substellar Atmosphere: High-resolution Emission, Transmission, and Reflection Spectroscopy with ExoJAX2
The Astrophysical Journal·2025· 2 citedOpen Access
Measurement of Methane Line Broadening in Hot Hydrogen/Helium Atmospheres at <i>λ</i> = 1.60–1.63 <i>μ</i>m for Substellar Object Spectroscopy
The Astrophysical Journal·2025· 1 citedOpen Access
Probing Two-dimensional Asymmetries of an Exoplanet Atmosphere from Chromatic Transit Variation
The Astronomical Journal·2025· 2 citedOpen Access
Elemental abundances of 44 very metal-poor stars determined from Subaru/IRD near-infrared spectra
Publications of the Astronomical Society of Japan·2025Open Access
Measurement of Methane Line Broadening in Hot Hydrogen/Helium Atmospheres at $λ$ = 1.60-1.63 μm for Substellar Object Spectroscopy
arXiv (Cornell University)·2025Open Access
Elemental abundances of 44 very metal-poor stars determined from Subaru/IRD near-infrared spectra
arXiv (Cornell University)·2025Open Access
Revisiting Near-infrared Features of Kilonovae: The Importance of Gadolinium
The Astrophysical Journal·2025· 4 citedOpen Access
Revisiting Near-Infrared Features of Kilonovae: The Importance of Gadolinium
arXiv (Cornell University)·2024Open Access
Weighing Single-lined Spectroscopic Binaries Using Tidal Effects on Radial Velocities: The Case of V723 Monocerotis
The Astrophysical Journal·2024· 2 citedOpen Access
Spectroscopy using a visible photonic lantern at the Subaru Telescope: Laboratory characterization and the first on-sky demonstration on Ikiiki (<i>α</i> Leo) and ‘Aua (<i>α</i> Ori)
Astronomy and Astrophysics·2024· 3 citedOpen Access
Spectroscopy using a visible photonic lantern at the Subaru telescope: Laboratory characterization and first on-sky demonstration on Ikiiki (α Leo) and `Aua (α Ori)
arXiv (Cornell University)·2024Open Access
Status of FIRST spectro-interferometer on SCExAO: sensitivity study and characterization of 5-telescopes visible photonics integrated circuits
2024
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Frequent Co-authors

Motohide Tamura(27), Teruyuki Hirano(21), Tomoyuki Kudo(19), Jun Nishikawa(18), Masayuki Kuzuhara(17), Masashi Omiya(16), Takashi Kurokawa(14), Norio Narita(14), K. W. Hodapp(12), Hiroki Harakawa(11), Sébastien Vievard(10), Nobuhiko Kusakabe(10), Akihiko Fukui(10), Akitoshi Ueda(10), Olivier Guyon(9), Shane Jacobson(9), Eric Gaidos(9), Yasunori Hori(8), Masahiro Ikoma(8), Takuma Serizawa(8)