Origin of the Galactic Center S-Stars: Gravitational Torques from Lin-Shu-Type Spiral Density Waves

Details Origin of the Galactic Center S-Stars: Gravitational Torques from Lin-Shu-Type Spiral Density Waves Origin of the Galactic Center S-Stars: Gravitational Torques from Lin-Shu-Type Spiral Density Waves

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...709..597g&link_type=abstract

The Astrophysical Journal, Volume 709, Issue 2, pp. 597-604 (2010).

Physics

7

Black Hole Physics, Galaxy: Center, Galaxy: Kinematics And Dynamics, Methods: Analytical

Scientific paper

The supermassive ~4 × 106 M sun black hole at the Galactic center is surrounded by a parsec-scale star disk, with several thousands of dynamically relaxed, evolved, late-type CO absorption line stars and a small ~100 population of luminous O and Wolf-Rayet stars which move in approximately circular Keplerian orbits. These bluish in color massive O and Wolf-Rayet stars are very young with an estimated age of 6 ± 2 Myr. Another small group of roughly 20 young (<10 Myr) blue B stars with the orbital periods as short as 15 years ("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 Jeans' gravitational fragmentation of gas. The newly formed S-stars then migrated inward to the Galactic center via the torques exerted by Lin-Shu-type spiral density waves on the stars at an inner Lindblad resonance. The model explains both the number of observed S-stars orbiting the Galactic black hole within the nuclear (<0.05 pc) star cluster and the key property of the S-star orbits, namely, their high eccentricities.

Affiliated with

Also associated with

No associations

Rating

Origin of the Galactic Center S-Stars: Gravitational Torques from Lin-Shu-Type Spiral Density Waves does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Origin of the Galactic Center S-Stars: Gravitational Torques from Lin-Shu-Type Spiral Density Waves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Origin of the Galactic Center S-Stars: Gravitational Torques from Lin-Shu-Type Spiral Density Waves will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1309332