HI observations of edge-on spiral galaxies

¹ Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany e-mail: huchtmeier@mpifr-bonn.mpg.de
² Special Astrophysical Observatory, Russian Academy of Sciences, N.Arkhyz, KChR 369167, Russia
³ Astronomical Observatory of Kiev University, Kiev, Ukraine
⁴ Isaac Newton Institute of Chile, SAO Branch, Russia

Received: 3 June 2004
Accepted: 7 January 2005

Abstract

Neutral hydrogen observations with the 100-m Effelsberg radio telescope are presented for 268 spiral galaxies from the Revised Flat Galaxy Catalog. Fluxes, radial velocities and line widths are given for 121 detected galaxies, as well as search parameters for 147 undetected objects. Most of the detected galaxies are late type (Sbc – Sdm) spirals with a mean ratio of 2.5 in solar units. (M₂₅ is the total mass within the isophote) and a mean hydrogen mass fraction . Correlations between global parameters are discussed briefly. A comparison with a sample of nearby galaxies (within 10 Mpc) demonstrates the validity of the same linear relation between the optical luminosity (L_B) and the linear diameter (A₂₅) down to the smallest galaxies.