Ultra Low Surface Brightness Galaxies

Details Ultra Low Surface Brightness Galaxies Ultra Low Surface Brightness Galaxies

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9363c&link_type=abstract

HST Proposal ID #9363

Physics

Hst Proposal Id #9363

Scientific paper

Extremely low surface brightness galaxies have been detected in the Virgo cluster, which are 2 magnitudes fainter than any previously known in that cluster or even in the Local Group. ACS images of three of these should resolve stars at the giant branch tip, and allow us to determine distances, mean metal abundance of the stars, and rough ages. Confirmation of the nature of these galaxies will provide evidence that dark matter halos are pervasive in the universe, extending to galaxies with stellar densities 6 times lower than currently known. These resolved stars would be the most distant yet observed accurately by HST.

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