The dragon simulations: globular cluster evolution with a million stars
文献类型：期刊论文
| 作者 | Wang, Long1,2; Spurzem, Rainer1,3,4,5 ; Aarseth, Sverre6; Giersz, Mirek7; Askar, Abbas7; Berczik, Peter3,4,5,8; Naab, Thorsten9; Schadow, Riko9; Kouwenhoven, M. B. N.1,2
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2016-05-11 |
| 卷号 | 458期号:2页码:1450-1465 |
| 关键词 | methods: numerical stars: black holes stars: kinematics and dynamics globular clusters: general |
| 英文摘要 | Introducing the dragon simulation project, we present directN-body simulations of four massive globular clusters (GCs) with 10(6) stars and 5 per cent primordial binaries at a high level of accuracy and realism. The GC evolution is computed with nbody6++gpu and follows the dynamical and stellar evolution of individual stars and binaries, kicks of neutron stars and black holes (BHs), and the effect of a tidal field. We investigate the evolution of the luminous (stellar) and dark (faint stars and stellar remnants) GC components and create mock observations of the simulations (i.e. photometry, colour-magnitude diagrams, surface brightness and velocity dispersion profiles). By connecting internal processes to observable features, we highlight the formation of a long-lived 'dark' nuclear subsystem made of BHs, which results in a two-component structure. The inner core is dominated by the BH subsystem and experiences a core-collapse phase within the first Gyr. It can be detected in the stellar (luminous) line-of-sight velocity dispersion profiles. The outer extended core - commonly observed in the (luminous) surface brightness profiles - shows no collapse features and is continuously expanding. We demonstrate how a King model fit to observed clusters might help identify the presence of post core-collapse BH subsystems. For global observables like core and half-mass radii, the direct simulations agree well with Monte Carlo models. Variations in the initial mass function can result in significantly different GC properties (e.g. density distributions) driven by varying amounts of early mass-loss and the number of forming BHs. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000374569600025 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/5376]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Peking Univ, Kavli Inst Astron & Astrophys, Yiheyuan Lu 5, Beijing 100871, Peoples R China 2.Peking Univ, Sch Phys, Dept Astron, Yiheyuan Lu 5, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China 4.Chinese Acad Sci, Key Lab Computat Astrophys, 20A Datun Rd, Beijing 100012, Peoples R China 5.Heidelberg Univ, Zentrum Astron, Astron Rechen Inst, Monchhofstr 12-14, D-69120 Heidelberg, Germany 6.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England 7.Polish Acad Sci, Nicolaus Copernicus Astron Ctr, Ul Bartycka 18, PL-00716 Warsaw, Poland 8.Natl Acad Sci Ukraine, Main Astron Observ, 27 Akad Zabolotnoho St, UA-03680 Kiev, Ukraine 9.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85741 Garching, Germany |
| 推荐引用方式 GB/T 7714 | Wang, Long,Spurzem, Rainer,Aarseth, Sverre,et al. The dragon simulations: globular cluster evolution with a million stars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,458(2):1450-1465. |
| APA | Wang, Long.,Spurzem, Rainer.,Aarseth, Sverre.,Giersz, Mirek.,Askar, Abbas.,...&Kouwenhoven, M. B. N..(2016).The dragon simulations: globular cluster evolution with a million stars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,458(2),1450-1465. |
| MLA | Wang, Long,et al."The dragon simulations: globular cluster evolution with a million stars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 458.2(2016):1450-1465. |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。