1999/11/18 by W. K. Huchtmeier, И. Д. Караченцев, I. D. Karachentsev +2 · 1 citation
Mathematics · Physics and Astronomy · #Absolute magnitude #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Emission spectrum #Equivalent width #Galaxies: Formation, Evolution, Phenomena #Galaxy #Geometry #Line (geometry) #Line width #Luminosity #Mathematics #Optics #Physics #Spectral line #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1051/0004-6361:20030138
published as Astron.Astrophys. 401 (2003) 483-490 · 22 pages, 9 ps figures, A&AS, in press
arxiv created 1999/11/18 · openalex publication_date 2003/03/21 · arxiv updated 2009/12/01 · openalex created_date 2017/10/20 · openalex updated_date 2026/08/05
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 ≥-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 ; linear diameter kpc (this corresponds to the de Vaucouleurs diameter D25); half power line width km s-1; total HI mass ; distance Mpc; HI mass-to-luminosity ratio ; total mass-to luminosity ratio .