Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...105..342l&link_type=abstract
Astronomy and Astrophysics, vol. 105, no. 2, Jan. 1982, p. 342-350. Research supported by the Deutsche Forschungsgemeinschaft.
Astronomy and Astrophysics
Astrophysics
53
Galactic Nuclei, Galactic Structure, Gas Evolution, Hydrodynamic Equations, Milky Way Galaxy, Star Formation, Bursts, Energy Dissipation, Galactic Evolution, Gas Expansion, Gravitational Fields, Jeans Theory, Periodic Variations, Stellar Luminosity, Stellar Mass Ejection, Supernovae
Scientific paper
Scenarios for the possible future of the galactic center are presented, based on one-dimensional hydrodynamic calculations which follow the evolution of the gas for several hundreds of millions of years. The overall spectral appearance of the galactic center after a burst is described, and parallels to other active nuclei are drawn. Results suggest that the final engine of the motions of the gas is star formation, and after the birth of a new generation of stars, the remaining gas is churned up by supernova explosions to terminate the star formation process and lead to an expansion of the gas. After dissipation of the turbulent energy, the gas settles again in the center. Two solutions are obtained: repetitive bursts with a period of 10 to the 8th yr, or a supermassive condensation within the innermost few pc.
Kruegel Endrick
Loose Hans-Hermann
Tutukov A.
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