Evolution of massive and magnetized disks

Details Evolution of massive and magnetized disks Evolution of massive and magnetized disks

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf..291f&link_type=abstract

SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret

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Scientific paper

Protoplanetary disks are likely to be very massive in the early phases of their evolution. As a consequence, they are subject to gravitational instabilities that transport angular momentum outward. MHD turbulence resulting from the magnetorotational instability can also develop when the disk is weakly magnetized. We present the first 3D global simulations of massive and magnetized disks. These simulations show that gravitational instabilities and MHD turbulence strongly interact with each other. A high frequency mode excited by the turbulence interferes with a gravitationally unstable mode. Their coupling causes the mass accretion rate onto the central objet to vary periodically with time.

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