Shigeru Ida studies the assembly of planets from smaller orbiting bodies. With Eiichiro Kokubo, he investigated oligarchic growth, in which a relatively small population of large protoplanets grows by accreting surrounding planetesimals.
The large bodies also stir the random motion of the smaller ones. That dynamical heating changes their capture efficiency, so growth cannot be inferred from mass alone. Their numerical calculations connected growth and orbital spacing, helping explain how a disk of many small bodies can develop a more orderly population of planetary embryos.[ref]
Oligarchic Growth of Protoplanets by Eiichiro Kokubo and Shigeru Ida. Abstract: planetesimal velocity evolution, separated large bodies and oligarchic growth
Portrait of Shigeru Ida
. External portrait hosted by Tokyo Institute of Technology / Institute of Science Tokyo. Source. Articles by others on the same topic
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