The Stellar Population of UGCA 292, An Extreme Low Metallicity Galaxy

Details The Stellar Population of UGCA 292, An Extreme Low Metallicity Galaxy The Stellar Population of UGCA 292, An Extreme Low Metallicity Galaxy

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9044v&link_type=abstract

HST Proposal ID #9044

Physics

Hst Proposal Id #9044 Stellar Populations

Scientific paper

As the third lowest metallicity galaxy known, UGCA 292 provides a unique opportunity to investigate the evolutionary status of extremely metal-poor, gas-rich, star-forming galaxies. UGCA 292 is sufficiently nearby {3.1 Mpc}, that it is possible to resolve the stellar population with HST. The proposed observations will enable us to investigate the stellar population of this relatively unevolved galaxy to determine if the low metallicity and high gas mass fraction are indicative of a newly formed galaxy. The detection of an intermediate age stellar population in UGCA 292 will definitively prove that it is possible to have galaxies which are gas-rich and metal-poor, yet have extended star formation histories. Alternatively, the lack of an intermediate age stellar population in UGCA 292 will support the hypothesis that there is no single epoch of galaxy formation, and that some low mass galaxies have delayed formation for almost a Hubble time.

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