The enigmatic Local Group starburst galaxy IC 10

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

IC 10 is the nearest starburst galaxy, but its study is hampered by widely varying estimates of its distance and line-of-sight extinction in the literature. Using both ground-based and HST data I derive a mean foreground reddening and a distance modulus which are consistent with previously published values based on Cepheids, but inconsistent with certain results in the literature. I discuss a number of possible reasons for this discrepancy, and the implications for work on nearby, i.e., resolved, galaxies. An analysis of color-magnitude diagrams reveals that, in addition to its current starburst, IC 10 has been actively forming stars for at least the past 100 Myr, and moreover has substantial stellar populations as old as 10 Gyr.

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