Massive star formation near the Galactic center and the fate of the stellar remnants

Details Massive star formation near the Galactic center and the fate of the stellar remnants Massive star formation near the Galactic center and the fate of the stellar remnants

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...408..496m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 408, no. 2, p. 496-506.

Astronomy and Astrophysics

Astronomy

233

Black Holes (Astronomy), Galactic Nuclei, Massive Stars, Milky Way Galaxy, Star Formation, Interstellar Gas, Stellar Luminosity, Stellar Mass

Scientific paper

The constraints on star formation in and near a galactic nucleus are outlined, and the degree of the concentration of massive stellar remnants toward the nucleus is assessed. Within 10-100 parsecs of a galactic nucleus, star formation is strongly affected by the physical extremes of the nuclear region: strong tidal forces, strongly enhanced cloud turbulence and gas heating, and relatively large magnetic fields. Black hole remnants of massive stars will inevitably migrate in the central stellar core of a galaxy and be concentrated there. The radius from which they will sink into the core in the galaxy's lifetime depends on the central mass concentration; for the Milky Way, it is about 4 pc. Close gravitational interactions of stellar remnants with red giants in the central stellar core of the Galaxy occur with sufficient frequency to be important for the evolution of both. The stellar core of the Galaxy is currently bereft of gas, except for the winds emanating from the luminous stellar objects located there.

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