Stellar populations in the Galactic Center

Details Stellar populations in the Galactic Center Stellar populations in the Galactic Center

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sf2a.conf..581m&link_type=abstract

SF2A-2005: Semaine de l'Astrophysique Francaise, meeting held in Strasbourg, France, June 27 - July 1, 2005, Edited by F. Casoli

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

The massive stellar content of the cluster surrounding the central black hole of the Galaxy is presented. In addition to the few very bright stars observed more than ten years ago, ˜ 80 OB stars have been revealed through the use of powerful AO assisted near-IR instruments (NACO, SINFONI). Proper motions and radial velocities indicate that these stars gather preferentially in two disks around Sgr A*. 3D orbits of the stars in the central arcsecond are reconstructed and constrain the central black hole mass. Spectral typing shows the presence of ˜ 30 Wolf-Rayet stars and ˜ 50 OB stars. This population is consistent with a burst of star formation ˜ 6 Myr ago, showing that star formation took place recently in this extreme environment.

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