EDP Sciences
Free access
Issue
A&A
Volume 401, Number 2, April II 2003
Page(s) 483 - 489
Section Galactic structure and dynamics
DOI http://dx.doi.org/10.1051/0004-6361:20030138


A&A 401, 483-489 (2003)
DOI: 10.1051/0004-6361:20030138

HI observations of nearby galaxies V. Narrow (HI) line galaxies

W. K. Huchtmeier1, I. D. Karachentsev2 and V. E. Karachentseva3

1  Max-Plank-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
2  Special Astrophysical Observatory, Russian Academy of Sciences, N.Arkhyz, KChR 369167, Russia
3  Astronomical Observatory of Kiev University, Observatorna, 3, 04053 Kiev, Ukraine

(Received 17 December 2002 / Accepted 22 January 2003)

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 $\ge$-30° and only a few galaxies at greater distances. It is described by the following median values of global physical parameters: total absolute blue magnitude $M_{B_{\rm t}} = -12.85$; linear diameter A0 = 1.63 kpc (this corresponds to the de Vaucouleurs diameter  D25); half power line width $W_{\rm c} = 29$ km s -1; total HI mass $M_{\rm HI} = 2\times 10^{7}~M_{\odot}$; distance D = 5.1 Mpc; HI mass-to-luminosity ratio $M_{\rm HI}/L_{B} = 0.9~M_{\odot}/L_{\odot}$; total mass-to luminosity ratio $M_{\rm t}/L_{B} =
2.9~M_{\odot}/L_{\odot}$ .


Key words: galaxies: distances and redshifts -- galaxies: dwarf -- galaxies: general

Offprint request: W. K. Huchtmeier, huchtmeier@mpifr-bonn.mpg.de

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