Eddington capture sphere around luminous stars
文献类型：期刊论文
| 作者 | Stah, A.1; Wielgus, M.2; Abramowicz, M.1,3,4; Kluzniak, W.3; Yu, W.5
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2012-10-01 |
| 卷号 | 546期号:1页码:1 |
| 关键词 | accretion accretion disks stars: neutron radiation mechanisms: general relativistic processes |
| 英文摘要 | Test particles infalling from infinity onto a compact spherical star with a mildly super-Eddington luminosity at its surface are typically trapped on the "Eddington capture sphere" and do not reach the surface of the star. The presence of a sphere on which radiation pressure balances gravity for static particles was first discovered some twenty five years ago. Subsequently, it was shown to be a capture sphere for particles in radial motion, and more recently also for particles in non-radial motion, in which the Poynting-Robertson radiation drag efficiently removes the orbital angular momentum of the particles, reducing it to zero. Here we develop this idea further, showing that "levitation" on the Eddington sphere (above the stellar surface) is a state of stable equilibrium, and discuss its implications for Hoyle-Lyttleton accretion onto a luminous star. When the Eddington sphere is present, the cross-section of a compact star for actual accretion is typically less than the geometrical cross-section pi R-2, direct infall onto the stellar surface only being possible for relativistic particles, with the required minimum particle velocity at infinity typically about half the speed of light. We further show that particles on typical trajectories in the vicinity of the stellar surface will also be trapped on the Eddington capture sphere. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | QUASI-PERIODIC OSCILLATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000310349100054 |
| 源URL | [http://119.78.226.72/handle/331011/18125]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Gothenburg Univ, Dept Phys, S-41296 Gothenburg, Sweden 2.Inst Micromech & Photon, PL-02525 Warsaw, Poland 3.Copernicus Astron Ctr, PL-00716 Warsaw, Poland 4.Silesian Univ Opava, Fac Philosophy & Sci, Inst Phys, Opava 74601, Czech Republic 5.Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Stah, A.,Wielgus, M.,Abramowicz, M.,et al. Eddington capture sphere around luminous stars[J]. ASTRONOMY & ASTROPHYSICS,2012,546(1):1. |
| APA | Stah, A.,Wielgus, M.,Abramowicz, M.,Kluzniak, W.,&Yu, W..(2012).Eddington capture sphere around luminous stars.ASTRONOMY & ASTROPHYSICS,546(1),1. |
| MLA | Stah, A.,et al."Eddington capture sphere around luminous stars".ASTRONOMY & ASTROPHYSICS 546.1(2012):1. |
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来源：上海天文台
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