The origin of the infrared luminosity in Centaurus A

Details The origin of the infrared luminosity in Centaurus A The origin of the infrared luminosity in Centaurus A

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326..662j&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 15, 1988, p. 662-667.

Astronomy and Astrophysics

Astronomy

43

Cosmic Dust, Elliptical Galaxies, Far Infrared Radiation, Galactic Radiation, Infrared Sources (Astronomy), Active Galactic Nuclei, Luminosity, Point Sources, Stellar Radiation

Scientific paper

The origin of the infrared luminosity in Centaurus A is studied using new tracking and data acquisition techniques which yield diffraction-limited profiles at both 50 and 100 microns. Ninety percent of the 100 micron flux is found to originate in a source which extends 5 kpc along the optical dust lane that bisects the galaxy; the remaining 10 percent comes from an unresolved source coincident with the active radio nucleus. The extended 100 micron emission profile is fully consistent with a uniform disk of thermally radiating particles; when combined with results of previous studies at shorter wavelengths, these measurements indicate that nearly all of the infrared luminosity is produced by thermally emitting grains which are heated by massive young stars distributed throughout the optically thick dust lane.

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