ORBIT-BASED DYNAMICAL MODELS OF THE SOMBRERO GALAXY (NGC 4594)
文献类型：期刊论文
| 作者 | Jardel, John R.1; Gebhardt, Karl1; Shen, Juntai2 ; Fisher, David B.3; Kormendy, John1; Kinzler, Jeffry1; Lauer, Tod R.4; Richstone, Douglas5; Gueltekin, K.5
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2011-09-20 |
| 卷号 | 739期号:1页码:21 |
| 关键词 | galaxies: individual (M104 galaxies: kinematics and dynamics galaxies: photometry NGC 4594) |
| 英文摘要 | We present axisymmetric, orbit-based models to study the central black hole (BH), stellarmass-to-light ratio (M/L), and dark matter (DM) halo of NGC 4594 (M104, the Sombrero Galaxy). For stellar kinematics, we use published high-resolution kinematics of the central region taken with the Hubble Space Telescope, newly obtained Gemini long-slit spectra of the major axis, and integral field kinematics from the Spectroscopic Areal Unit for Research on Optical Nebulae instrument. At large radii, we use globular cluster kinematics to trace the mass profile and apply extra leverage to recovering the DM halo parameters. We find a BH of mass M-center dot = (6.6 +/- 0.4) x 10(8) M-circle dot and determine the stellar M/L-I = 3.4 +/- 0.05 (uncertainties are the 68% confidence band marginalized over the other parameters). Our best-fit DM halo is a cored logarithmic model with asymptotic circular speed V-c = 376 +/- 12 km s(-1) and core radius r(c) = 4.7 +/- 0.6 kpc. The fraction of dark to total mass contained within the half-light radius is 0.52. Taking the bulge and disk components into account in our calculation of sigma(e) puts NGC 4594 squarely on the M-sigma relation. We also determine that NGC 4594 lies directly on the M-L relation. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SUPERMASSIVE BLACK-HOLES ; DARK-MATTER HALO ; BULGE MASS RELATION ; GAUSSIAN EXPANSION METHOD ; GLOBULAR-CLUSTER SYSTEMS ; HUBBLE-SPACE-TELESCOPE ; TO-LIGHT RATIO ; VELOCITY DISPERSION ; STELLAR POPULATIONS ; KINEMATICAL MODELS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000294955700021 |
| 公开日期 | 2015-02-02 |
| 源URL | [http://119.78.226.72//handle/331011/15502]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Texas Austin, Dept Astron, Austin, TX 78712 USA 2.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Univ Maryland, Dept Astron, Lab Millimeter Wave Astron, CSS 1204, College Pk, MD 20742 USA 4.Natl Opt Astron Observ, Tucson, AZ 85726 USA 5.Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA |
| 推荐引用方式 GB/T 7714 | Jardel, John R.,Gebhardt, Karl,Shen, Juntai,et al. ORBIT-BASED DYNAMICAL MODELS OF THE SOMBRERO GALAXY (NGC 4594)[J]. ASTROPHYSICAL JOURNAL,2011,739(1):21. |
| APA | Jardel, John R..,Gebhardt, Karl.,Shen, Juntai.,Fisher, David B..,Kormendy, John.,...&Gueltekin, K..(2011).ORBIT-BASED DYNAMICAL MODELS OF THE SOMBRERO GALAXY (NGC 4594).ASTROPHYSICAL JOURNAL,739(1),21. |
| MLA | Jardel, John R.,et al."ORBIT-BASED DYNAMICAL MODELS OF THE SOMBRERO GALAXY (NGC 4594)".ASTROPHYSICAL JOURNAL 739.1(2011):21. |
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来源：上海天文台
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