Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...313..413r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 313, Feb. 1, 1987, p. 413-419. NASA-supported research.
Astronomy and Astrophysics
Astrophysics
33
Andromeda Galaxy, Astronomical Models, Emission Spectra, Galactic Bulge, Galactic Structure, Infrared Spectra, Stellar Envelopes, Asymptotic Giant Branch Stars, Giant Stars, Late Stars, Optical Thickness, Stellar Luminosity, Stellar Mass Ejection
Scientific paper
A quantitative model for the IR emission from the bulge of the Galaxy is constructed using a sequence of models for circumstellar dust shells around late-type stars. The luminosity function for asymptotic giant branch stars and the distribution function for the dust-shell optical depth are derived. The total bolometric luminosity of the bulge population is 170 million solar luminosities and the total mass loss rate is 0.0083 solar mass/yr. The 12 microns and most of the 25 microns flux from the inner part of M31 can be understood as emission from a bulge population similar to that in the Galaxy. A simple model for the IR emission from late-type stars in the disk of the Galaxy is also given.
Chester T.
Rowan-Robinson Michael
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