H II Regions in Ring Galaxies

Details H II Regions in Ring Galaxies H II Regions in Ring Galaxies

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002rmxac..12..244m&link_type=abstract

Ionized Gaseous Nebulae, a Conference to Celebrate the 60th Birthdays of Silvia Torres-Peimbert and Manuel Peimbert, Mexico City

Astronomy and Astrophysics

Astronomy

Galaxies: Abundances, Galaxies: Interactions, Galaxies: Photometry

Scientific paper

We carried out H alpha +[N II] emission line imaging survey of a sample of nine ring galaxies in order to map the distribution of H II regions in them. H II regions are detected in all the nine galaxies, with a majority of the H II regions confined to the ring. In four of the sample galaxies, we detect relatively faint intra-ring H alpha emission. The intra-ring/total flux fraction is 0.20-0.30 in three cases (Arp141, 291, and 143) and 0.45 in the fourth (NGC2793). The utility of these galaxies with intra-ring H alpha emission for the determination of abundance gradients is discussed.

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