Astronomy and Astrophysics – Astronomy
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238...24r&link_type=abstract
Astrophysical Journal, Part 1, vol. 238, May 15, 1980, p. 24-40. NSF-supported research.
Astronomy and Astrophysics
Astronomy
675
Astronomical Spectroscopy, Galactic Nuclei, Infrared Astronomy, Stellar Evolution, Astronomical Maps, Infrared Photometry, Interstellar Magnetic Fields, Nonthermal Radiation, Radio Sources (Astronomy), Stellar Models
Scientific paper
New infrared photometry, spectroscopy, and mapping of M82 and spectroscopy of NGC 253 are used with previously published results to constrain star-burst models of the energetic nuclear sources in these galaxies. Bursts of star formation can account quantitatively for the properties of these sources, including the high luminosities, strong nonthermal radio emission, correspondence of radio and infrared sources, large populations of red giants and supergiants, large ultraviolet fluxes, and X-ray luminosities. However, the initial mass function (IMF) in these regions must be biased against the formation of solar-mass stars, compared with the IMF in the solar neighborhood, and the conversion of gas into stars must be very efficient.
Lebofsky Marcia J.
Low Frank J.
Rieke George H.
Thompson Rodger I.
Tokunaga Alan T.
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