Far-infrared emission from clumpy irregular galaxies

Details Far-infrared emission from clumpy irregular galaxies Far-infrared emission from clumpy irregular galaxies

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...154..373k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 154, no. 1-2, Jan. 1986, p. 373-375.

Astronomy and Astrophysics

Astrophysics

14

Continuous Spectra, Far Infrared Radiation, Galactic Radiation, Irregular Galaxies, H Ii Regions, Luminosity, Radio Emission, Star Formation Rate, Starburst Galaxies, Stellar Evolution, Supernovae

Scientific paper

The IRAS spacecraft has observed the four clumpy irregular galaxies Mkn 8, Mkn 296, Mkn 297, and Mkn 325, detecting all galaxies in at least two of the four detector bands. The continuum spectra of the galaxies over a range of seven decades in frequency are presented, and compared to those of the starburst galaxy M82 and the giant H II region NGC 604 in M33. The significantly higher ratio of radio to far-IR luminosity of two clumpy irregular galaxies is suggested to be due to the large number of massive stars in these galaxies. Mkn 297 is found to emit about three times the far-IR luminosity of M82, in keeping with its high radio luminosity, and this is seen as suggestive of a star-formation rate ten times higher than that of a normal spiral galaxy.

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