NASA NTRS · 19840044926
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.
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Habing, H. J., Miley, G., Young, E., Baud, B., Boggess, N., Clegg, P. E., Harris, S., Rowan-Robinson, M., De Jong, T., Raimond, E.. 1984-03-01. Infrared emission from M31. https://ntrs.nasa.gov/citations/19840044926
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