Jets and disks around young stars

Details Jets and disks around young stars Jets and disks around young stars

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999arep...43..104l&link_type=abstract

Astronomy Reports, Volume 43, Issue 2, February 1999, pp.104-112

Astronomy and Astrophysics

Astronomy

2

Scientific paper

Equilibrium models are constructed for quasi-Keplerian pressure-confined gas disks with a constant half-thickness-to-radius ratio, in the gravitational field of a central massive object (young star). It is shown that the equilibrium parameters of such disks are uniquely determined by the physical parameters of the surrounding atmosphere. A linear analysis is performed for the stability of a model with a gas disk in an atmosphere and bipolar jets perpendicular to the plane of the accretion disk. The possible development of a discrete set of unstable acoustic and gradient wave modes in such systems is shown. The existence in the accretion-jet system of unstable axisymmetric perturbations that form radiating knots in the jets may lead to synchronization of these knots in the two oppositely directed jets, and to the efficient outward transport of the angular momentum of the accretion-disk material.

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