Recurrent Outbursts and Jet Ejections Expected in Swift J1644+57: Limit-Cycle Activities in a Supermassive Black Hole
文献类型：期刊论文
| 作者 | Kawashima, Tomohisa1; Ohsuga, Ken2,3; Usui, Ryuichi4; Kawai, Nobuyuki4; Negoro, Hitoshi5; Matsumoto, Ryoji6 |
| 刊名 | PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2013-08-25 |
| 卷号 | 65期号:4 |
| 关键词 | accretion, accretion disks black hole physics hydrodynamics radiative transfer X-rays: individual (Swift J16449.3+573541) |
| 英文摘要 | A tidal disruption event by a supermassive black hole in Swift J1644+57 can trigger limit-cycle oscillations between a supercritically accreting X-ray bright state and a subcritically accreting X-ray dim state. The time evolution of debris gas around a black hole with mass M = 10(6) M-circle dot is studied by performing axisymmetric, two-dimensional radiation hydrodynamic simulations. We assume the alpha-prescription of viscosity, in which the viscous stress is proportional to the total pressure. The mass supply rate from the outer boundary was assumed to be (M) over dot(supply) = 100 L-Edd/c(2), where L-Edd is the Eddington luminosity, and c is the light speed. Since the mass accretion rate decreases inward by outflows driven by radiation pressure, the state transition from a supercritically accreting slim disk state to a subcritically accreting Shakura-Sunyaev disk starts from the inner disk, and propagates outward on a timescale of one day. The sudden drop of the X-ray flux observed in Swift J1644+57 in 2012 August can be explained by this transition. As long as (M) over dot(supply) exceeds the threshold for the existence of a radiation pressure dominant disk, the accumulation of accreting gas in the subcritically accreting region triggers the transition from a gas pressure dominant Shakura-Sunyaev disk to a slim disk. This transition takes place at t similar to 50/(alpha/0.1) d after the X-ray darkening. We expect that if alpha > 0.01, X-ray emission with luminosity >= 10(44) erg s(-1) and jet ejection will revive in Swift J1644+57 in 2013-2014. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | SLIM ACCRETION DISKS ; TIDAL DISRUPTION ; MAGNETOHYDRODYNAMIC SIMULATIONS ; DOMINATED DISKS ; STAR ; FLOWS ; OSCILLATIONS ; MODEL ; J164449.3+573451 ; DIFFUSION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000330328300001 |
| 公开日期 | 2014-09-22 |
| 源URL | [http://119.78.226.72//handle/331011/15149]  |
| 专题 | 上海天文台_空间导航与定位技术重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan 3.Grad Univ Adv Study SOKENDAI, Sch Phys Sci, Hayama, Kanagawa 2400193, Japan 4.Tokyo Inst Technol, Dept Phys, Tokyo 1818588, Japan 5.Nihon Univ, Dept Phys, Chiyoda Ku, Tokyo 1018308, Japan 6.Chiba Univ, Grad Sch Sci, Dept Phys, Inage Ku, Chiba 2638522, Japan |
| 推荐引用方式 GB/T 7714 | Kawashima, Tomohisa,Ohsuga, Ken,Usui, Ryuichi,et al. Recurrent Outbursts and Jet Ejections Expected in Swift J1644+57: Limit-Cycle Activities in a Supermassive Black Hole[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2013,65(4). |
| APA | Kawashima, Tomohisa,Ohsuga, Ken,Usui, Ryuichi,Kawai, Nobuyuki,Negoro, Hitoshi,&Matsumoto, Ryoji.(2013).Recurrent Outbursts and Jet Ejections Expected in Swift J1644+57: Limit-Cycle Activities in a Supermassive Black Hole.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,65(4). |
| MLA | Kawashima, Tomohisa,et al."Recurrent Outbursts and Jet Ejections Expected in Swift J1644+57: Limit-Cycle Activities in a Supermassive Black Hole".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 65.4(2013). |
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来源：上海天文台
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