Query : 2001A&A...377.1016V

2001A&A...377.1016V - Astronomy and Astrophysics, volume 377, 1016-1022 (2001/10-3)

The stability of the Circumnuclear Disk clouds in the Galactic Centre.


Abstract (from CDS):

The influence of rotation and magnetic fields on the physical properties of isothermal gas clouds is discussed. The presence of rotation and/or magnetic fields results in an increase of the critical cloud mass with respect to gravitational instability for clouds of a given temperature and external pressure. Rotating clouds have higher densities. Consequently, they are more stable against tidal shear than non-rotating clouds. They can approach the Galactic Centre up to a radius of ∼2pc without being disrupted by the tidal shear due to the gravitational potential. For smaller radii the clouds either collapse or become tidally disrupted. We suggest that this mechanism is responsible for the formation of the inner edge of the Circumnuclear Disk in the Galactic Centre.

Abstract Copyright:

Journal keyword(s): ISM: clouds - ISM: evolution - Galaxy: center

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13539 0
2 NAME Galactic Circumnuclear Disk PoG 17 45 40.0 -29 00 28           ~ 151 0

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