Using XMM-Newton to study the energy-dependent variability of H 1743-322 during its 2014 outburst
文献类型：期刊论文
| 作者 | Stiele, H.1,2,3,4; Yu, W.3,4 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2016-08-01 |
| 卷号 | 460期号:2页码:1946-1953 |
| 关键词 | Black Hole Physics Binaries: Close X-rays: Binaries X-rays: Individual: h 1743-322 |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnras/stw821 |
| 英文摘要 | Black hole transients evolve during bright outbursts, showing distinct changes in their spectral and variability properties. These changes are interpreted as evidence for changes in the accretion flow and in the X-ray-emitting regions. We obtained an anticipatedXMM-Newton Target of Opportunity observation of H 1743-322 during its outburst in 2014 September. Based on data from eight outbursts observed in the last 10 yr, we expected to catch the start of the hard-to-soft state transition. The fact that neither the general shape of the observed power density spectrum nor the characteristic frequency shows an energy dependence implies that the source remained in the low-hard state at the time of our observation near outburst peak. The spectral properties agree with the source being in the low-hard state, and aSwift/XRT monitoring of the outburst revealed that H 1743-322 stayed in the low-hard state during the entire outburst (known as a 'failed outburst'). Here we derive the averaged QPO waveform and obtain phase-resolved spectra. A comparison of the phase-resolved spectra with the phase-averaged energy spectrum reveals spectral pivoting. We compare variability on long and short time-scales using covariance spectra and find that the covariance ratio does not show an increase towards lower energies. In other binaries an increase has been found. There are two possible explanations: either the absence of additional disc variability on longer time-scales is related to the high inclination of H 1743-322 compared with other black hole X-ray binaries, or it is the reason why we observe H 1743-322 during a failed outburst. More data on failed outbursts and on high-inclination sources will be needed in order to investigate these two possibilities further. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000379832800063 |
| 出版者 | OXFORD UNIV PRESS |
| 源URL | [http://119.78.226.72/handle/331011/32751]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Stiele, H. |
| 作者单位 | 1.Natl Tsing Hua Univ, Inst Astron, 101 Sect 2 Kuang Fu Rd, Hsinchu 30013, Taiwan 2.Natl Tsing Hua Univ, Dept Phys, 101 Sect 2 Kuang Fu Rd, Hsinchu 30013, Taiwan 3.Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 4.Ctr Galaxy & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Stiele, H.,Yu, W.. Using XMM-Newton to study the energy-dependent variability of H 1743-322 during its 2014 outburst[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,460(2):1946-1953. |
| APA | Stiele, H.,&Yu, W..(2016).Using XMM-Newton to study the energy-dependent variability of H 1743-322 during its 2014 outburst.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,460(2),1946-1953. |
| MLA | Stiele, H.,et al."Using XMM-Newton to study the energy-dependent variability of H 1743-322 during its 2014 outburst".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 460.2(2016):1946-1953. |
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来源：上海天文台
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