253 citations · 3k across the 95 of their papers we have counts for
5 papers · 2 filters
Dynamics and Accretion of Planetesimals
Eiichiro Kokubo, Shigeru Ida
We review the basic dynamics and accretion of planetesimals by showing N-body simulations. The orbits of planetesimals evolve through two-body gravitational relaxation: viscous sti…
A Double Planetary System around the Evolved Intermediate-Mass Star HD 4732
Bun'ei Sato, Masashi Omiya, Robert A. Wittenmyer +10
We report the detection of a double planetary system orbiting around the evolved intermediate-mass star HD 4732 from precise Doppler measurements at Okayama Astrophysical Observato…
A dynamical study on the habitability of terrestrial exoplanets I: Tidally evolved planet-satellite pairs
R. Brasser, S. Ida, E. Kokubo
We investigate the obliquity and spin period of Earth-Moon like systems after 4.5 Gyr of tidal evolution with various satellite masses and initial planetary obliquity and discuss t…
Substellar Companions to Seven Evolved Intermediate-Mass Stars
Bun'ei Sato, Masashi Omiya, Hiroki Harakawa +8
We report the detections of substellar companions orbiting around seven evolved intermediate-mass stars from precise Doppler measurements at Okayama Astrophysical Observatory. o UM…
Tidal disruption of satellites and formation of narrow rings
Zoe M. Leinhardt, Gordon I. Ogilvie, Henrik N. Latter +1
In this paper we investigate the formation of narrow planetary rings such as those found around Uranus and Saturn through the tidal disruption of a weak, gravitationally bound sate…