Other
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...351l..33i&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 351, March 10, 1990, p. L33-L35.
Other
20
Dwarf Galaxies, Galactic Structure, H I Regions, Virgo Galactic Cluster, Galactic Evolution, Galactic Mass, Mass To Light Ratios, Star Formation Rate
Scientific paper
The detection of an optical counterpart to the large H I cloud recently discovered by Giovanelli and Haynes (1989) in the Local Supercluster is reported. The peak of the H I flux corresponds to a low surface brightness, dwarf irregular galaxy. The counterpart was discovered on a photographically amplified image from the UK Schmidt Telescope, and its maximum extent is 180 arcsecs at the 27 mag/sq arcsec isotope. The H I and optical data may be explained by a pair of LSB dwarf irregular galaxies that have similar velocities. Some star formation appears to be taking place in this system, but the H I column density is below the threshold for extensive star formation. A kinematic study is required to determine the total mass. This galaxy is similar to other LSB dwarfs and dI pairs which have enormous mass-to-light ratios and H I sizes far in excess of the optical scale length.
Bothun Gregory
Impey Chris
Malin David
Staveley--Smith Lister
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