Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ap%26ss.332..379l&link_type=abstract
Astrophysics and Space Science, Volume 332, Issue 2, pp.379-384
Astronomy and Astrophysics
Astrophysics
Stability, Anomalous Viscosity, Accretion Disk
Scientific paper
The stability of a thin magnetized accretion disk surrounding a young stellar object (YSO) is numerically examined. Here we adopt a somewhat more physical viscosity prescription (anomalous magnetic viscosity) than previous authors did. Our results show that, under the short wavelength approximation ( kr≫1), viscous and thermal modes are stable, while two magneto-acoustic modes are unstable. Particularly, for the unstable modes, the values of the growth rates are smaller in the outer region than ones in the inner. It means that the growth time scales for these instabilities in the inner region are shorter than in the outer, which maybe provide an explanation for fast burst.
Lin Fu-Jun
Liu San-Qiu
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