HI observations of nearby galaxies . I. The first list of the Karachentsev catalog
Abstract
We present HI observations of the galaxies in the first list of the Karachentsev catalog of previously unknown nearby dwarf galaxies (Karachentseva & Karachentsev 1998). This survey covers all known nearby galaxy groups within the Local Volume (i.e. within 10 Mpc) and their environment, that is about 25% of the total sky. A total of 257 galaxies have been observed with a detection rate of 60%. We searched a frequency band corresponding to heliocentric radial velocities from -470 km s-1 to ~ +4000 km s-1. Non-detections are either due to limited coverage in radial velocity, confusion with Local HI (mainly in the velocity range -140 km s-1 to +20 km s-1), or lack of sensitivity for very weak emission. 25% of the detected galaxies are located within the Local Volume. Those galaxies are dwarf galaxies judged by their optical linear diameter (1.4 +/- 0.2 kpc on the average), their mean total HI mass (4.6 107 Msun), and their observed linewidths (39 km s-1).
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- February 2000
- DOI:
- 10.1051/aas:2000324
- Bibcode:
- 2000A&AS..141..469H
- Keywords:
-
- GALAXIES: DISTANCES AND REDSHIFTS;
- DWARF;
- FUNDAMENTAL PARAMETERS;
- GENERAL