Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981nyasa.375..347o&link_type=abstract
(AAS, American Physical Society, NASA, et al., Texas Symposium on Relativistic Astrophysics, 10th, Baltimore, MD, Dec. 15-19, 19
Astronomy and Astrophysics
Astrophysics
Density Distribution, Galactic Nuclei, Galactic Radiation, Interstellar Gas, Molecular Clouds, Astronomical Maps, Hydrogen Clouds, Infrared Radiation, Interstellar Masers, Mass To Light Ratios, Radio Emission
Scientific paper
The mass density and radio emission from the galactic nucleus, compact infrared sources within the nucleus, and the distribution and anomalous motions of interstellar gas in regions surrounding the nucleus are discussed. A model of the galactic nucleus is presented in which the core-collapse timescale would allow no room for a black hole of several million solar masses that might be responsible for the anomalous motions of the gaseous features near the center. The discrete sources found at 10 microns are discussed, and suggestions for cloud lifetimes and birth rates in the nucleus are presented. The strength of interstellar gas concentration toward the center is shown along with the asymmetry and clumpiness of the distribution, and the very large deviation from circular motion. These points are illustrated by the absorption profile of Sagittarius A in OH and HI.
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