Optical identifications of 230 HIPASS radio sources |
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Authors: | I D Karachentsev D I Makarov V E Karachentseva O V Melnik |
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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 |
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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. |
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Keywords: | dwarf galaxies galaxy evolution interstellar gas in galaxies |
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