Infrared emission from M31.
Abstract
Maps of M31 have been obtained at wavelengths of 12, 25, 60, and 100 microns. Emission is detected from the center and from a ring of 50 arcmin radius. The ring is that also seen in H I, in H II, and in radio continuum radiation. The spectrum of the central emission suggests a hotter dust temperature than in the ring. M31 is a weak infrared source, the radiation measured longward of 12 microns being only 3 percent of its total luminosity. The two closest companion galaxies, M32 and NGC 205, have also been detected.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1984
- DOI:
- 10.1086/184223
- Bibcode:
- 1984ApJ...278L..59H
- Keywords:
-
- Andromeda Galaxy;
- Astronomical Maps;
- Galactic Radiation;
- Infrared Astronomy;
- Spaceborne Astronomy;
- Emission Spectra;
- Hydrogen Clouds;
- Infrared Astronomy Satellite;
- Spectral Bands;
- Astrophysics