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High-Resolution Simulations of Catastrophic Disruptions: Resultant Shape Distributions
Keisuke Sugiura, Hiroshi Kobayashi, Shu-ichiro Inutsuka
The members of asteroid families have various shapes. We investigate the origin of their shapes by high-resolution impact simulations for catastrophic disruptions using a Smoothed…
Importance of Giant Impact Ejecta for Orbits of Planets Formed during the Giant Impact Era
Hiroshi Kobayashi, Kazuhide Isoya, Yutaro Sato
Terrestrial planets are believed to be formed via giant impacts of Mars-sized protoplanets. Planets formed via giant impacts have highly eccentric orbits. A swarm of planetesimals…
First sub-arcsecond submillimeter-wave [C I] image of 49 Ceti with ALMA
Aya E. Higuchi, Kazuya Saigo, Hiroshi Kobayashi +7
We present the first sub-arcsecond images of 49 Ceti in the [C I]3P1-3P0 emission and the 614 micron dust continuum emission observed with ALMA, as well as that in the CO(J=3-2) em…
Collisional Elongation: Possible Origin of Extremely Elongated Shape of 1I/`Oumuamua
Keisuke Sugiura, Hiroshi Kobayashi, Shu-ichiro Inutsuka
Light curve observations of a recently discovered interstellar object 1I/`Oumuamua suggest that this object has an extremely elongated shape with the axis ratio 0.3 or smaller. Pla…