Zombie vortices in protoplanetary disks - Phil Marcus(SETI Talks)
Zombie vortices in protoplanetary disks - Phil Marcus(SETI Talks)
Δημοσιεύτηκε στις 23 Σεπ 2016
The
understanding of the early stages of planet formation from a disk of
orbiting particles is an ongoing challenge for astrophysics and
planetary science. Dr. Marcus will address the importance of
instabilities in the particle disk as a link in the planetary formation
chain.
Without instabilities, gas around a forming protostar
remains in orbit, and the final star cannot form; dust grains cannot
accumulate to form planets; and the compositions of meteorites cannot be
explained. Unfortunately, the Keplerian motion within a disk is assumed
by most astrophysicists to be stable by Rayleigh’s theorem because the
angular momentum of the disk increases with increasing radius.
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