Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103.1536d&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 103, no. 5, May 1992, p. 1536-1544. Research supported by University of Massachusett
Astronomy and Astrophysics
Astronomy
33
Far Infrared Radiation, Luminosity, Spiral Galaxies, Cosmic Dust, H Alpha Line, H Ii Regions, Infrared Astronomy Satellite
Scientific paper
High angular resolution 170 micron and H-alpha maps have been recombined in order to elucidate the origin of the far-IR luminosity within the late-type spiral galaxy M51. New quantitative evidence is presented supporting a common origin for the far-IR and H-alpha luminosities is the striking correspondence, at all locations measured within M51, between the luminosity in the far IR and that expected from the O and B stars which are required to ionize the hydrogen gas. The warm 33 K dust temperature measured for M51 is similar to that measured for galactic and extragalactic star formation regions. It is concluded that O and B stars can easily generate both the far-IR luminosity and the warm dust temperature at all locations within M51. The dust mass required to radiate the IRAS 60 and 100 micron emission measured for M51 represents only a small percentage of the total dust content of M51. Constraints are placed on the mass and temperature of the cold dust.
Devereux Nicholas A.
Young Judith S.
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