435 citations · 3k across the 62 of their papers we have counts for
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Crowding Out of Giants by Dwarfs: An Origin for the Lack of Companion Planets in Hot Jupiter Systems
Masahiro Ogihara, Shu-ichiro Inutsuka, Hiroshi Kobayashi
We investigate formation of close-in terrestrial planets from planetary embryos under the influence of a hot Jupiter (HJ) using gravitational N-body simulations that include gravit…
Local Enhancement of Surface Density in the Protoplanetary Ring Surrounding HD 142527
Misato Fukagawa, Takashi Tsukagoshi, Munetake Momose +15
We report ALMA observations of dust continuum, 13CO J=3--2, and C18O J=3--2 line emission toward a gapped protoplanetary disk around HD 142527. The outer horseshoe-shaped disk show…
Condition for Capture into First-order Mean Motion Resonances and Application to Constraints on Origin of Resonant Systems
Masahiro Ogihara, Hiroshi Kobayashi
We investigate the condition for capture into first-order mean motion resonances using numerical simulations with a wide range of various parameters. In particular, we focus on der…
Small Planetesimals in a Massive Disk Formed Mars
Hiroshi Kobayashi, Nicolas Dauphas
Mars is likely to be a planetary embryo formed through collisions with planetesimals, which can explain its small mass and rapid formation timescale obtained from 182Hf-182$W chron…
Evolution of dust grain size distribution by shattering in the interstellar medium: robustness and uncertainty
Hiroyuki Hirashita, Hiroshi Kobayashi
Shattering of dust grains in the interstellar medium is a viable mechanism of small grain production in galaxies. We examine the robustness or uncertainty in the theoretical predic…