
arXiv: astro-ph/0503441
handle: 2381/26498 , 2381/20906
We consider the origin of the so-called S stars orbiting the supermassive black hole at the very center of the Galaxy. These are usually assumed to be massive main-sequence stars. We argue instead that they are the remnants of low-to-intermediate mass red giants which have been scattered on to near-radial orbits and tidally stripped as they approach the central black hole. Such stars retain only low-mass envelopes and thus have high effective temperatures. Our picture simultaneously explains why S stars have tightly-bound orbits, and the observed depletion of red giants in the very center of the Galaxy.
9 pages, 1 figure, ApJ Letters, in press
DISRUPTION, Science & Technology, Galaxy : center, CYGNUS X-2, Astrophysics (astro-ph), Galaxy : kinematics and dynamics, FOS: Physical sciences, Astronomy & Astrophysics, MASS, SUPERMASSIVE BLACK-HOLE, Astrophysics, SAGITTARIUS-A-ASTERISK, GALAXY, BINARIES, Physical Sciences, Galaxy : nucleus, STELLAR REMNANTS, CENTRAL PARSEC, CLUSTERS
DISRUPTION, Science & Technology, Galaxy : center, CYGNUS X-2, Astrophysics (astro-ph), Galaxy : kinematics and dynamics, FOS: Physical sciences, Astronomy & Astrophysics, MASS, SUPERMASSIVE BLACK-HOLE, Astrophysics, SAGITTARIUS-A-ASTERISK, GALAXY, BINARIES, Physical Sciences, Galaxy : nucleus, STELLAR REMNANTS, CENTRAL PARSEC, CLUSTERS
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