HI properties of nearby galaxies from a volume-limited sample

Abstract

We consider global HI and optical properties of about three hundred nearby galaxies with V${}_0<500$ km/s. The majority of them have individual photometric distance estimates. The galaxy sample parameters, e.g. their linear diameters, their HI mass-to-luminosity ratio, their total mass-to-luminosity ratio, their mean optical surface brightness show some known and some new correlations implying a meaningful dynamic explanation. For the LV galaxies their HI mass and angular momentum follow a nearly linear relation expected for rotating gaseous disks being near the threashold of gravitational instability, favourable for active star formation.

5 pages, 9 figures, uses laa.sty accepted by A&A Suppl. Series

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