9 papers · 1 filter
Planet-Planet Scattering Explains the Mass-Eccentricity Relation of Warm Jupiters
Jiayin Dong, Eve J. Lee, Eiichiro Kokubo +2
Warm giant planets with orbital periods of tens of days exhibit a positive correlation between mass and eccentricity. We interpret this trend as the outcome of planet-planet scatte…
A Scaling Law for the Orbital Architecture of Planetary Systems Formed by Gravitational Scattering and Collisions
Eiichiro Kokubo, Haruka Hoshino, Yuji Matsumoto +1
In the standard formation models of terrestrial planets in the solar system and close-in super-Earths in non-resonant orbits recently discovered by exoplanet observations, planets…
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.…
A Resonant Beginning for the Solar System Terrestrial Planets
Shuo Huang, Chris Ormel, Simon Portegies Zwart +2
In the past two decades, transit surveys have revealed a class of planets with thick atmospheres -- sub-Neptunes -- that must have completed their accretion in protoplanet disks. W…
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…
Stellar Obliquity of the Ultra-Short-Period Planet System HD 93963
Huan-Yu Teng, Fei Dai, Andrew W. Howard +24
We report an observation of the Rossiter-McLaughlin (RM) effect of the transiting planet HD 93963 Ac, a mini-Neptune planet orbiting a G0-type star with an orbital period of $P_{\r…