LARGE-SCALE RING WAVES OF STAR FORMATION IN THE CARTWHEEL RING GALAXY

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Abstract:

Numerical modelling of propagating ring waves of star formation initiated by an off-center head-on galactic collision is performed. It is demonstrated that the observed azimuthal Hα surface brightness profile of the Cartwheel's outer ring can be approximately reproduced for a moderate off-center collision, with the impact point 3-4 kpc displaced from the dynamical center. For larger impact points the ring wave of star formation breaks into a spiral, which cannot account for the observed morphology of the Cartwheel ring galaxy.

Keywords: Galaxies; individual; photometry - Galaxies; the Cartwheel - Galaxies

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/1055679021000017376

Affiliations: Institute of Physics, Rostov University, Stachki 194, Rostov-on-Don, 344094, Russia

Publication date: February 1, 2003

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