Reviving Dead Zones in accretion disks by Rossby vortices at their boundaries

Models 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 ex...

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Bibliographic Details
Published inAstronomy and astrophysics (Berlin) Vol. 446; no. 2; pp. L13 - L16
Main Authors Varnière, P., Tagger, M.
Format Journal Article
LanguageEnglish
Published Les Ulis EDP Sciences 01.02.2006
Subjects
accretion disks
Astronomy
Astrophysics
Cosmology and Extra-Galactic Astrophysics
Earth, ocean, space
Exact sciences and technology
instabilities
Physics
planetary systems: formation
Sciences of the Universe
Accretion
Planetary cosmogony
Vortices
Young stellar object
planetary systems: formation
Instability
Models
Accretion disks
Planetary system
instabilities
MHD turbulence
Instabilities
accretion disks
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Summary:Models 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, ApJ, 513, 805). This instability will create and sustain Rossby vortices in the disk which could lead to enhanced planet formation.
Bibliography:publisher-ID:aahi102
ark:/67375/80W-85LJH132-4
other:2006A%26A...446L..13V
istex:03A45394AE2405D1B8478A660701BA0FCBADF385
ISSN:0004-6361
1432-0746
DOI:10.1051/0004-6361:200500226