Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326..588k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 15, 1988, p. 588-595. NASA-supported research.
Astronomy and Astrophysics
Astrophysics
55
Carbon Monoxide, H I Regions, Interstellar Gas, Spiral Galaxies, Star Formation, Virgo Galactic Cluster, Hydrogen, Molecular Gases
Scientific paper
A comparison of CO and H I properties of Virgo cluster galaxies reveals a population of H I -rich, CO -poor, lower mass Sbc-Sm spiral galaxies undergoing prodigious massive star formation. Some of these galaxies have central H I surface densities as high as 5×1021cm-2, which is several times greater than the H I surface densities in more massive, H2-dominated spirals. This implies that the weak CO emission in these systems is due, at least in part, to a lack of H2. Two tracers of massive star formation, the Hα luminosity and the far-infrared luminosity, show excellent correlations with the total gas mass (H I + H2). Thus, within this sample of 31 galaxies, the efficiency of massive star formation does not depend strongly on whether gas is in the molecular or atomic phase.
Kenney Jeffrey D.
Young Judith S.
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