On nuclear starbursts from tidal interactions - A galactic core instability model

Details On nuclear starbursts from tidal interactions - A galactic core instability model On nuclear starbursts from tidal interactions - A galactic core instability model

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238.1345s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, June 15, 1989, p. 1345-1363. Research supported by

Astronomy and Astrophysics

Astronomy

4

Disk Galaxies, Galactic Nuclei, Starburst Galaxies, Collisions, Harmonic Oscillators, Molecular Clouds, Orbit Perturbation, Tides

Scientific paper

Tidal interaction is shown to produce core instability in axisymmetric disk galaxies in which loop orbits become box-like and nearly circular orbits become elliptic with secularly growing ellipticity. Due to core instability, even weak tidal forcing is shown to lead to strong transient spiral density waves in any thin cold disk component of galactic cores. The results sugest that self gravity of the disk is unlikely to interfere with the production of such a density wave as long as the disk contributes less than 10 percent of the core gravity.

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