Stellar population of the irregular galaxy IC 10

Details Stellar population of the irregular galaxy IC 10 Stellar population of the irregular galaxy IC 10

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009astl...35..748t&link_type=abstract

Astronomy Letters, Volume 35, Issue 11, pp.748-763

Astronomy and Astrophysics

Astronomy

8

Scientific paper

Based on our observations with the 6-m BTA telescope at the Special Astrophysical Observatory, the Russian Academy of Sciences, and archival Hubble Space Telescope images, we have performed stellar photometry for several regions of the irregular galaxy IC 10, a member of the Local Group. Distance moduli with a median value of m - M = 24.47, D = 780 ± 40 kpc, have been obtained by the TRGB method for several regions of IC 10. We have revealed 57 star clusters with various masses and ages within the fields used. Comparison of the Hertzsprung-Russell diagrams for star clusters in IC 10 with theoretical isochrones has shown that this galaxy has an enhanced metallicity, which probably explains the high ratio of the numbers of carbon and nitrogen Wolf-Rayet stars (WC/WN). The size of the galaxy’s thick disk along its minor axis is 10'.5 and a more extended halo is observed outside this disk.

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