The centre of the Galaxy

Details The centre of the Galaxy The centre of the Galaxy

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.301..661t&link_type=abstract

Nature, vol. 301, Feb. 24, 1983, p. 661-666.

Astronomy and Astrophysics

Astronomy

14

Galactic Nuclei, Gamma Ray Astronomy, Infrared Astronomy, Milky Way Galaxy, X Ray Astronomy, Black Holes (Astronomy), Interstellar Gas, Positron Annihilation, Radio Sources (Astronomy), Star Clusters

Scientific paper

X-ray, gamma-ray and IR observations of the Galaxy's nucleus show that it contains the densest concentration of stars in the Galaxy, as well as a quantity of ionized gas and warm dust, which is clumped into a small number of rapidly expanding individual clouds whose velocities approach + or - 300 km/sec. The detection of electron-positron anihilation radiation, and a peculiar radio point source very close to the galactic center, add to the belief that the nucleus may contain some unusual object, such as a black hole, which is responsible for the cloud velocities and dust-heating radiation observed. Attention is given to IR intensity contours of the region, as well as a review of the observational evidence for the presence of a black hole. It is noted that a massive black hole fails to account for the unusual ionizing radiation field detected.

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