Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apjs...70..699y&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 70, Aug. 1989, p. 699-722. Research supported by NASA.
Astronomy and Astrophysics
Astronomy
323
Galactic Clusters, Infrared Sources (Astronomy), Interstellar Gas, Star Formation, H Alpha Line, Infrared Astronomy Satellite, Radiant Flux Density, Stellar Luminosity, Tables (Data)
Scientific paper
Infrared flux densities of 182 galaxies, including 50 galaxies in the Virgo cluster, were analyzed using IRAS data for 12, 25, 60, and 100 microns, and the results were compared with data listed in the Point Source Catalog (PSC, 1985). In addition, IR luminosities, L(IRs), colors, and warm dust masses were derived for these galaxies and were compared with the interstellar gas masses and optical luminosities of the galaxies. It was found that, for galaxies whose optical diameter measures between 5 and 8 arcmin, the PSC flux densities are underestimated by a factor of 2 at 60 microns, and by a factor of 1.5 at 100 microns. It was also found that, for 49 galaxies, the mass of warm dust correlated well with the H2 mass, and that L(IR) correlated with L(H-alpha), demonstrating that the L(IR) measures the rate of star formation in these galaxies.
Kenney Jeffrey D. P.
Rice Walter L.
Xie Shuding
Young Judith S.
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