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Reviving Dead Zones in Accretion Disks by Rossby Vortices at their Boundaries

By P. Varnière and M. Tagger

Abstract

accepted by A&A lettersModels of the accretion disks of Young Stellar Objects show that they should not be ionized at a few AU from the star, and thus not subject to the MHD turbulence believed to cause accretion. This has been suggested to create a 'Dead Zone' where accretion remains unexplained. Here we show that the existence of the Dead Zone self-consistently creates a density profile favorable to the Rossby Wave Instability of Lovelace et al. (1999). This instability will create and sustain Rossby vortices in the disk which could lead to enhanced planet formation

Topics: accretion disks, Instabilities, planetary systems: formation, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], [SDU.ASTR] Sciences of the Universe [physics]/Astrophysics [astro-ph]
Publisher: EDP Sciences
Year: 2006
DOI identifier: 10.1051/0004-6361:200500226
OAI identifier: oai:HAL:in2p3-00025151v1
Provided by: Hal-Diderot
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