Other
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987nascp2466..367l&link_type=abstract
Star formation in galaxies, Proceedings of a conference at the California Institute of Technology, Pasadena, California, June 16
Other
4
Carbon Monoxide, Interstellar Matter, Molecular Gases, Radio Bursts, Star Formation, Stellar Radiation, Gas Composition, Gas Temperature, Hydrogen, Infrared Stars, Kinematics, Stellar Luminosity, Stellar Winds
Scientific paper
The 7" resolution CO observations of the central 1 kpc of M82 have resolved 2 components of molecular gas: (1) a high concentration in the central 700 pc x 200 pc, and (2) extended features that may be gas expelled from the central concentration. The central concentration of molecular gas falls in the same confines as the other tracers of recent star formation, and may be identified directly with the star burst region. The molecular gas in the star burst nucleus of M82 appears to be highly disturbed and has high kinetic temperature, likely consequences of the high density of young star clusters. Stellar winds and subsequent supernovae from the star clusters can effectively sweep up the interstellar medium. The spatial distribution and kinematics of the nuclear concentration of the molecular gas, as well as the 2 micron light distribution, suggest the presence of a stellar bar in M82. Comparisons of the M82 star burst nucleus to a sample of IR luminous galaxies suggest that star burst regions in general may have a higher gas temperature and much higher LIR/M sub H2 that the galactic disk, and that the LIR of the star burst regions may be essentially proportional to their area.
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