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Optical identifications of 230 HIPASS radio sources
Authors:I D Karachentsev  D I Makarov  V E Karachentseva  O V Melnik
Institution:(1) Special Astrophysical Observatory, Russian Academy of Sciences, Nizhnii Arkhyz, 357169, Karachaevo-Cherkesskaya Republic, Russia;(2) Observatoire de Lyon, 9 Avenue Charles André, 69561 Saint Genis Laval, France;(3) Astronomical Observatory, Kiev National University, Observatorna vul. 3, Kiev, 04053, Ukraine
Abstract:We present the coordinates, apparent magnitudes, and morphological types for 230 galaxies presumably identified with HIPASS (HI Parkes All-Sky Survey) sources. The new optical counterparts of the HIPASS sources follow the well-known statistical relationships between the hydrogen mass, luminosity, and type of galaxies. Low-surface-brightness galaxies constitute a significant fraction among these objects. The median value of the hydrogen mass-to-luminosity ratio for them is a factor of 2 or 3 higher than that for bright HIPASS galaxies, reaching 1.7M /L . A number of our objects are located near the boundary log(M HI/L B ) = 0.2(M B + 20) that defines the zone of gravitational stability of disk galaxies against large-scale star formation.
Keywords:dwarf galaxies  galaxy evolution  interstellar gas in galaxies
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