The Shape of the H i Mass Function for Late-Type Galaxies over the Range M H I 10 7--10 10 M sub sun

Astronomy and Astrophysics – Astronomy

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Galaxies: Ism, Galaxies: Luminosity Function, Mass Function, Radio Lines: Galaxies

Scientific paper

An analysis of two large catalogs of H I observations of nearby galaxies (Fisher & Tully and Hoffman et al.) does not yield evidence for either (1) a sharp rise in the number of low-mass- H I-rich objects relative to the number of large late-type galaxies or (2) a severe deficit of low-mass H I-rich objects. There may be a difference between the Virgo Cluster environment and the general field in the sense that the field is richer in small H I masses relative to the density of large galaxies, but a large uncertainty remains in determinations of the number density of objects with H I masses less than 107 Msun.

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