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HI observations of nearby galaxies I. The first list of the Karachentsev catalog

W. K. Huchtmeier·I. D. Karachentsev·V. E. Karachentseva·M. Ehle
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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 to about +4000 km/s. Non-detections are either due to limited coverage in radial velocity, confusion with Local HI (mainly in the velocity range -140 km/s to +20 km/s, 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 E7 solar masses), and their observed linewidths (39 km/s).

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W. K. Huchtmeier, I. D. Karachentsev, V. E. Karachentseva, M. Ehle. 1999-11-18. HI observations of nearby galaxies I. The first list of the Karachentsev catalog. https://doi.org/10.1051/0004-6361%3A20030138

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