Sling amplification and eccentric gravitational instabilities in gaseous disks

Details Sling amplification and eccentric gravitational instabilities in gaseous disks Sling amplification and eccentric gravitational instabilities in gaseous disks

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...358..495s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 358, Aug. 1, 1990, p. 495-514. Research supported by NASA.

Astronomy and Astrophysics

Astrophysics

198

Eccentricity, Eigenvalues, Gas Dynamics, Gravitational Effects, Gravitational Fields, Star Formation, Accretion Disks, Energy Dissipation, Luminous Intensity

Scientific paper

An analytical description is presented of the modal mechanisms relevant to a recently discovered type of eccentric gravitational instability in nearly Keplerian disks. A quantum condition is derived which accurately predicts the pattern speeds for these modes. The growth rates for the modes are determined, and it is shown that the mode can grow when the disk is safely stable to axisymmetric disturbances. The case of marginal stability for the outside edge is discussed, and the implications of the results for the formation of binary companions and/or giant planets within disks associated with young stellar objects are considered.

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