Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...371..515d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 371, April 20, 1991, p. 515-524. Research supported by University of Massac
Astronomy and Astrophysics
Astronomy
96
Galactic Structure, Infrared Sources (Astronomy), Interstellar Matter, Spiral Galaxies, Star Formation, Far Infrared Radiation, Hubble Diagram, Infrared Astronomy, Infrared Astronomy Satellite, Stellar Mass
Scientific paper
Data obtained with IRAS are used to compare and contrast the global star formation rates for a galactic sample which represents essentially all known noninteracting spiral and lenticular galaxies within 40 Mpc. The distribution of 60 micron luminosity is similar for spirals of types Sa-Scd inclusively, although the luminosities of the very early and very late types are, on average, one order of magnitude lower. High-mass star formation rates are similar for early, intermediate, and late type spirals, and the average high-mass star formation rate per unit molecular gas mass is independent of type for spiral galaxies. A remarkable homogeneity exists in the high-mass star-forming capabilities of spiral galaxies, particularly among the Sa-Scd types. The Hubble sequence is therefore not a sequence in the present-day rate or production efficiency of high-mass stars.
Devereux Nicholas A.
Young Judith S.
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