H I observations of nearby galaxies. III. More dwarf galaxies in the northern sky

Details H I observations of nearby galaxies. III. More dwarf galaxies in the northern sky H I observations of nearby galaxies. III. More dwarf galaxies in the northern sky

Feb 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...366..428k&link_type=abstract

Astronomy and Astrophysics, v.366, p.428-438 (2001)

Astronomy and Astrophysics

Astrophysics

31

Galaxies: Distances And Redshifts, Galaxies: Dwarf, Galaxies: Fundamental Parameters, Galaxies: General, Galaxies: Irregular, Infrared: Galaxies

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>~ 0farcm5 . About two thirds of the objects are new discoveries. This sample is considered as a supplement to the 163 northern dwarf galaxy candidates (A&AS, 1998, 127, 409) which have been detected in the same declination range around the known Local Volume galaxies and to the 78 dwarf galaxy candidates (A&AS, 1999, 135, 221) in the Local Void region. All the galaxies were observed in {H I 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 V_LG = +770 km s-1, {H I line width W50 = 46 km s-1, absolute blue magnitude M_B = -13.8 mag, linear diameter A0 = 2.7 kpc, hydrogen mass-to-luminosity ratio M_HI/L_B = 1.2\ Msun/Lsun, and the HI mass-to-total mass ratio Mion {H i}/M_t=0.28. Tables~1 and~2 are also available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5)} or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/366/428 Figure~1 is only available at http://www.edpsciences.org

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