5 papers
A Dichotomy of the Mass-Metallicity Relation of Exoplanetary Atmospheres Demarcated by their Birthplace
Kazumasa Ohno, Masahiro Ikoma, Satoshi Okuzumi +1
Atmospheric observations by JWST raise a growing evidence that atmospheric metallicity exhibits an anti-correlation with masses of giant exoplanets. While such a trend was anticipa…
The mass of TOI-654 b: A short-period sub-Neptune transiting a mid-M dwarf
Kai Ikuta, Norio Narita, Takuya Takarada +40
Sub-Neptunes are small planets between the size of the Earth and Neptune. The orbital and bulk properties of transiting sub-Neptunes can provide clues for their formation and evolu…
Semi-analytical model for the dynamical evolution of planetary system II: Application to systems formed by a planet formation model
Tadahiro Kimura, Eiichiro Kokubo, Yuji Matsumoto +2
The standard formation model of close-in low-mass planets involves efficient inward migration followed by growth through giant impacts after the protoplanetary gas disk disperses.…
Semi-analytical model for the dynamical evolution of planetary systems via giant impacts
Tadahiro Kimura, Haruka Hoshino, Eiichiro Kokubo +2
In the standard model of terrestrial planet formation, planets are formed through giant impacts of planetary embryos after the dispersal of the protoplanetary gas disc. Traditional…
Monosilane Worlds: Sub-Neptunes with Atmospheres Shaped by Reduced Magma Oceans
Yuichi Ito, Tadahiro Kimura, Kazumasa Ohno +2
High-precision infrared spectroscopic measurements now enable detailed characterization of sub-Neptune atmospheres, potentially providing constraints on their interiors. Motivated…