THE MOST MASSIVE ULTRA-COMPACT DWARF GALAXY IN THE VIRGO CLUSTER
文献类型：期刊论文
| 作者 | Liu, Chengze1,2; Peng, Eric W.3,4; Toloba, Elisa5,6; Mihos, J. Christopher7; Ferrarese, Laura8; Alamo-Martinez, Karla9,10; Zhang, Hong-Xin9,10,11; Cote, Patrick8; Cuillandre, Jean-Charles12; Cunningham, Emily C.5 |
| 刊名 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 出版日期 | 2015-10-10 |
| 卷号 | 812期号:1 |
| 关键词 | galaxies: clusters: individual (Virgo) galaxies: dwarf galaxies: evolution galaxies: individual (M59) galaxies: nuclei galaxies: star clusters: general |
| 英文摘要 | We report on the properties of the most massive ultra-compact dwarf galaxy (UCD) in the nearby Virgo Cluster of galaxies using imaging from the Next Generation Virgo Cluster Survey and spectroscopy from Keck/DEIMOS. This object (M59-UCD3) appears to be associated with the massive Virgo galaxy M59 (NGC 4621), has an integrated velocity dispersion of 78 km s(-1), a dynamical mass of 3.7 x 10(8)M(circle dot), and an effective radius (R-e) of 25 pc. With an effective surface mass density of 9.4 x 10(10)M(circle dot) kpc(-2), it is the densest galaxy in the local universe discovered to date, surpassing the density of the luminous Virgo UCD, M60-UCD1. M59-UCD3 has a total luminosity of M-g' = -14.2 mag, and a spectral energy distribution consistent with an old (14 Gyr) stellar population with [Fe/H] = 0.0 and [alpha/Fe] = +0.2. We also examine deep imaging around M59 and find a broad low surface brightness stream pointing toward M59-UCD3, which may represent a tidal remnant of the UCD progenitor. This UCD, along with similar objects like M60-UCD1 and M59cO, likely represents an extreme population of tidally stripped galaxies more akin to larger and more massive compact early-type galaxies than to nuclear star clusters in present-day dwarf galaxies. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | STELLAR POPULATION SYNTHESIS ; ACS FORNAX CLUSTER ; GLOBULAR-CLUSTERS ; STAR-CLUSTERS ; SURVEY. VI. ; KINEMATICS ; LIGHT ; DISTANCE ; SYSTEMS ; MODELS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000364479800002 |
| 源URL | [http://119.78.226.72/handle/331011/28394]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Shanghai Jiao Tong Univ, Dept Phys & Astron, Ctr Astron & Astrophys, Shanghai 200240, Peoples R China 2.Shanghai Jiao Tong Univ, Shanghai Key Lab Particle Phys & Cosmol, Shanghai 200240, Peoples R China 3.Peking Univ, Dept Astron, Beijing 100871, Peoples R China 4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 5.Univ Calif Santa Cruz, Univ Calif Observ, Lick Observ, Santa Cruz, CA 95064 USA 6.Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA 7.Case Western Reserve Univ, Dept Astron, Cleveland, OH 44106 USA 8.Natl Res Council Canada, Herzberg Inst Astrophys, Victoria, BC V9E 2E7, Canada 9.Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 7820436, Chile 10.Chinese Acad Sci, South Amer Ctr Astron, Santiago, Chile |
| 推荐引用方式 GB/T 7714 | Liu, Chengze,Peng, Eric W.,Toloba, Elisa,et al. THE MOST MASSIVE ULTRA-COMPACT DWARF GALAXY IN THE VIRGO CLUSTER[J]. ASTROPHYSICAL JOURNAL LETTERS,2015,812(1). |
| APA | Liu, Chengze.,Peng, Eric W..,Toloba, Elisa.,Mihos, J. Christopher.,Ferrarese, Laura.,...&Yin, Jun.(2015).THE MOST MASSIVE ULTRA-COMPACT DWARF GALAXY IN THE VIRGO CLUSTER.ASTROPHYSICAL JOURNAL LETTERS,812(1). |
| MLA | Liu, Chengze,et al."THE MOST MASSIVE ULTRA-COMPACT DWARF GALAXY IN THE VIRGO CLUSTER".ASTROPHYSICAL JOURNAL LETTERS 812.1(2015). |
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来源：上海天文台
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