1999ApJ...527..835A


Query : 1999ApJ...527..835A

1999ApJ...527..835A - Astrophys. J., 527, 835-850 (1999/December-3)

The distribution of stars near the supermassive black hole in the galactic center.

ALEXANDER T.

Abstract (from CDS):

We analyze three sets of infrared star counts in the inner ∼0.5 pc of the Galactic center. We perform statistical tests on the star counts and model in detail the extinction field and the effects of dwarf-giant collisions on the luminosity function. We find that both the star counts and the depletion of the brightest stars in the inner ∼0.05 pc can be explained by an n∝r–α stellar cusp with α in the range 3/2-7/4, in which the envelopes of the brightest giants are destroyed by stellar collisions. Such a cusp is consistent with the Bahcall-Wolf solution for the distribution of stars that have undergone two-body relaxation around a black hole. We show that systematic uncertainties due to variable extinction and unrelaxed stars are probably small, but deeper star counts are required to confirm these results. We estimate that the tidal disruption rate of cusp stars by the black hole is a fewx10–5 yr–1.

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Journal keyword(s): Galaxy: Center - Galaxy: Kinematics and Dynamics - Galaxy: Stellar Content - Infrared: Stars

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
2 GCIRS 29N WR* 17 45 39.917 -29 00 26.71           WC9 61 0
3 GCIRS 7 LP* 17 45 39.987 -29 00 22.24           M2 388 0
4 GCIRS 16 Cl* 17 45 40.0 -29 00 28           ~ 387 0
5 [EG97] S1 * 17 45 40.0418 -29 00 28.324           B0/2V 99 0
6 [EG97] S2 * 17 45 40.0442 -29 00 27.975           B0/2V 420 1
7 [CRG2004] 10 * 17 45 40.0558 -29 00 28.657           O-B 28 0
8 [EG97] S8 * 17 45 40.0716 -29 00 28.363           B0/2V 78 0
9 GCIRS 16CC s*b 17 45 40.1939 -29 00 27.532           O9.5/B0.5I 60 0
10 GCIRS 21 WR* 17 45 40.222 -29 00 30.85           WC9 104 0
11 GCIRS 1W Em* 17 45 40.442 -29 00 27.51           Be? 109 0

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