Axisymmetric dynamical models of the central regions of galaxies

被引:341
作者
Gebhardt, K
Richstone, D
Tremaine, S
Lauer, TR
Bender, R
Bower, G
Dressler, A
Faber, SM
Filippenko, AV
Green, R
Grillmair, C
Ho, LC
Kormendy, J
Magorrian, J
Pinkney, J
机构
[1] Univ Texas, Dept Astron, Austin, TX 78712 USA
[2] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA
[3] Princeton Univ Observ, Princeton, NJ 08544 USA
[4] Natl Opt Astron Observ, Tucson, AZ 85726 USA
[5] Univ Sternwarte, D-81679 Munich, Germany
[6] Comp Sci Corp, Space Telescope Sci Inst, Baltimore, MD 21218 USA
[7] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA
[8] Univ Calif Santa Cruz, Lick Observ, Univ Calif Observ, Santa Cruz, CA 95064 USA
[9] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
[10] SIRTF Sci Ctr, Pasadena, CA 91125 USA
[11] Univ Durham, Dept Phys, Durham DH1 3LE, England
关键词
black hole physics; galaxies : general; galaxies : nuclei; galaxies : statistics; stellar dynamics;
D O I
10.1086/345081
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present axisymmetric, orbit superposition models for 12 galaxies using data taken with the Hubble Space Telescope (HST) and ground-based observatories. In each galaxy, we detect a central black hole (BH) and measure its mass to accuracies ranging from 10% to 70%. We demonstrate that in most cases the BH detection requires both the HST and ground-based data. Using the ground-based data alone does provide an unbiased measure of the BH mass (provided that they are fitted with fully general models), but at a greatly reduced significance. The most significant correlation with host galaxy properties is the relation between the BH mass and the velocity dispersion of the host galaxy; we find no other equally strong correlation and no second parameter that improves the quality of the mass-dispersion relation. We are also able to measure the stellar orbital properties from these general models. The most massive galaxies are strongly biased to tangential orbits near the BH, consistent with binary BH models, while lower mass galaxies have a range of anisotropies, consistent with an adiabatic growth of the BH.
引用
收藏
页码:92 / 115
页数:24
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