DISKS AROUND BROWN DWARFS IN THE EJECTION SCENARIO. I. DISK COLLISIONS IN TRIPLE SYSTEMS
文献类型：期刊论文
| 作者 | Umbreit, Stefan1,6,7; Spurzem, Rainer2,3,4 ; Henning, Thomas1; Klahr, Hubert1; Mikkola, Seppo5
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2011-12-20 |
| 卷号 | 743期号:2 |
| 关键词 | brown dwarfs celestial mechanics circumstellar matter planetary systems protoplanetary disks stars: formation stars: kinematics and dynamics stars: low-mass |
| 英文摘要 | We investigate the fate of disks around brown dwarfs in the ejection scenario and the implications on their observable properties. For that purpose, a parameter study of close triple approaches leading to escape is carried out where the ejected body is surrounded by a low-mass disk. We analyze the recircularized radial surface density profile of the post-encounter disk in dependence of the minimum two-body distances between the escaper and the perturbing bodies. Our results show that the general appearance of the disks is rather similar to disks after two-body encounters in as much as there is also an exponential drop in surface density for the outer disk regions as well as an enhancement of surface density for the innermost region relative to the initial disk profile. However, the disks after close triple approaches are mostly less massive, have generally flatter recircularized surface density disk profiles, and have radii that are similar or larger compared to disks after two-body encounters. From our results, we construct a simple scale-free model only depending on the minimum encounter distances of the two perturbers. Such a model is especially useful for statistical studies of disk collisions in triple systems that must cover a large range of encounter distances. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000298178400008 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7860]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Max Planck Inst Astron, D-69117 Heidelberg, Germany 2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 3.Univ Heidelberg, Zentrum Astron, Astron Rech Inst, D-69120 Heidelberg, Germany 4.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 5.Univ Turku, Tuorla Observ, Piikkio 21500, Finland 6.Northwestern Univ, Ctr Interdisciplinary Explorat & Res Astrophys CI, Evanston, IL 60208 USA 7.Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA |
| 推荐引用方式 GB/T 7714 | Umbreit, Stefan,Spurzem, Rainer,Henning, Thomas,et al. DISKS AROUND BROWN DWARFS IN THE EJECTION SCENARIO. I. DISK COLLISIONS IN TRIPLE SYSTEMS[J]. ASTROPHYSICAL JOURNAL,2011,743(2). |
| APA | Umbreit, Stefan,Spurzem, Rainer,Henning, Thomas,Klahr, Hubert,&Mikkola, Seppo.(2011).DISKS AROUND BROWN DWARFS IN THE EJECTION SCENARIO. I. DISK COLLISIONS IN TRIPLE SYSTEMS.ASTROPHYSICAL JOURNAL,743(2). |
| MLA | Umbreit, Stefan,et al."DISKS AROUND BROWN DWARFS IN THE EJECTION SCENARIO. I. DISK COLLISIONS IN TRIPLE SYSTEMS".ASTROPHYSICAL JOURNAL 743.2(2011). |
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来源：国家天文台
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