HI observations of nearby dwarf galaxies (Karachentsev+, 2001)

Details HI observations of nearby dwarf galaxies (Karachentsev+, 2001) HI observations of nearby dwarf galaxies (Karachentsev+, 2001)

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ycat..33660428k&link_type=abstract

VizieR On-line Data Catalog: J/A+A/366/428. Originally published in: 2001A&A...366..428K

Physics

Galaxies: Nearby, H I Data, Radial Velocities

Scientific paper

We carried out a systematic search for nearby dwarf galaxies in the northern sky based on POSS-II film copies. As a result we present a list of 101 nearby dwarf galaxy candidates mainly of low surface brightness which have angular diameters a>0.5'. About two thirds of the objects are new discoveries. This sample is considered as a supplement to the 163 northern dwarf galaxy candidates (1998, Cat., ) which have been detected in the same declination range around the known Local Volume galaxies and to the 78 dwarf galaxy candidates (1999A&AS..135..221K) in the Local Void region. All the galaxies were observed in HI with the 100-m Effelsberg radio telescope with a detection rate of 46%. The sample of detected galaxies has the following median parameters: radial velocity VLG=+770km/s, HI line width W50=46km/s, absolute blue magnitude MB=-13.8mag, linear diameter A0=2.7kpc, hydrogen mass-to-luminosity ratio MHI/LB=1.2M&sun;/L&sun;, and the HI mass-to-total mass ratio MHI/Mt=0.28. (2 data files).

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