The Star Formation History of Isolated Dwarf UGC 4879

Details The Star Formation History of Isolated Dwarf UGC 4879 The Star Formation History of Isolated Dwarf UGC 4879

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011eas....48...67j&link_type=abstract

EAS Publications Series, Volume 48, 2011, pp.67-68

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Scientific paper

Recent observations of UGC 4879 with the Advanced Camera for Surveys on the Hubble Space Telescope confirm that it is a nearby isolated dwarf irregular galaxy. We measure a distance of 1.36 ± 0.03 Mpc using the Tip of the Red Giant Branch method. This distance puts UGC 4879 beyond the radius of first turnaround of the Local Group and ~700 kpc from its nearest neighbor Leo A. This isolation makes this galaxy an ideal laboratory for studying pristine star formation uncomplicated by interactions with other galaxies. We present the star formation history of UGC 4879 derived from simulated color-magnitude diagrams.

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