Origin of the Galactic Center S-Stars

Details Origin of the Galactic Center S-Stars Origin of the Galactic Center S-Stars

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...702l...1g&link_type=abstract

The Astrophysical Journal Letters, Volume 702, Issue 1, pp. L1-L4 (2009).

Physics

4

Black Hole Physics, Galaxy: Center, Stellar Dynamics

Scientific paper

The supermassive black hole at the Galactic center is surrounded by a parsec-scale star disk, with about a hundred massive young stars that move in approximately circular Keplerian orbits. Another group of roughly 20 young stars ("S-stars") follow eccentric, randomly oriented orbits well inside the disk stars. A model is proposed to explain the S-stars. Accordingly, the stars formed originally in the parsec-scale disk through gravitational fragmentation of gas. The newly formed S-stars then migrated inward via the gravitational torques exerted by a Lin-Shu-type spiral density wave on the stars at an inner Lindblad resonance.

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