HI observations of nearby galaxies V. Narrow (HI) line galaxies
Abstract
In this paper we present new HI observations with high velocity resolution for 104 nearby narrow-line galaxies with half power line widths smaller than 50 km s-1 most of which are well approximated by a Gaussian. The FWHM line width of 30 of these integrated HI profiles is less than 25 km s-1. We present global parameters of these nearby galaxies and discuss the size dependence, the luminosity dependence, and the dependence of these parameters with the observed line width. Our sample essentially is a subsample of the Local Volume (i.e. galaxies within 10 Mpc) with declinations ge -30o and only a few galaxies at greater distances. It is described by the following median values of global physical parameters: total absolute blue magnitude MB_t = -12.85; linear diameter A0 = 1.63 kpc (this corresponds to the de Vaucouleurs diameter D25); half power line width Wc = 29 km s-1; total HI mass MHI = 2x 107 Msun; distance D = 5.1 Mpc; HI mass-to-luminosity ratio MHI/LB = 0.9 Msun/Lsun; total mass-to luminosity ratio Mt/LB = 2.9 Msun/Lsun.
Table 1 is only available in electronic form at http://www.edpsciences.org- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 2003
- DOI:
- 10.1051/0004-6361:20030138
- Bibcode:
- 2003A&A...401..483H
- Keywords:
-
- galaxies: distances and redshifts;
- galaxies: dwarf;
- galaxies: general