Vortex structure in the gaseous disk of the galaxy Mrk 1040

Details Vortex structure in the gaseous disk of the galaxy Mrk 1040 Vortex structure in the gaseous disk of the galaxy Mrk 1040

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993astl...19..319a&link_type=abstract

Astronomy Letters, Volume 19, Issue 5, September 1993, pp.319-323; Pis'ma v Astronomicheskii Zhurnal, Vol. 19, p. 787

Astronomy and Astrophysics

Astronomy

10

Scientific paper

From an analysis of published and unpublished results of observations of the galaxy Mrk 1040, we conclude that its gaseous disk contains two giant anticyclones with a size ~4 kpc. Two vortices of similar size also arise in numerical simulation of the dynamics of a gaseous disk with the rotation curve observed for Mrk 1040. The most important features of the detected vortices are their location between spiral arms in the region of an abrupt jump in rotation rate (~10 kpc) and their size, on the order of the Rossby radius. All of these features of the vortex structure can be explained in the hydrodynamic theory of the spiral structure of galaxies, and were first observed in laboratory experiments on rotating shallow water.

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