Detection of a quasi-periodic oscillation at 40 mHz in Cen X-3 with Insight-HXMT
文献类型：期刊论文
| 作者 | Liu, Q.; Wang, W. ; Chen, X.; Yang, W.; Lu, F. J.; Song, L. M.; Qu, J. L.; Zhang, S.; Zhang, S. N.
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| 刊名 | Monthly Notices of the Royal Astronomical Society
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| 出版日期 | 2022 |
| 卷号 | 516期号:4页码:5579 |
| ISSN号 | 0035-8711 |
| 关键词 | stars: neutron pulsars: individual: Cen X-3 X-rays: binaries Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Solar and Stellar Astrophysics |
| DOI | 10.1093/mnras/stac2646 |
| 文献子类 | Article |
| 英文摘要 | We investigated the quasi-periodic oscillation (QPO) features in the accretion-powered X-ray pulsar Cen X-3 observed by Insight-HXMT. For two observations in 2020 when Cen X-3 was in an extremely soft state, the power density spectrum revealed the presence of obvious QPO features at ~40 mHz with an averaged fractional rms amplitude of ~9 per cent. We study the mHz QPO frequency and rms amplitude over orbital phases, and find that the QPO frequency is ~33-39 mHz at the orbital phase of 0.1-0.4, increasing to ~37-43 mHz in the orbital phase of 0.4-0.8, but has no strong dependence on X-ray intensity. We also carried out an energy-dependent QPO analysis, the rms amplitude of the mHz QPOs have a decreasing trend as the energy increases from 2 to 20 keV. In addition, the QPO time-lag analysis shows that the time-delay is ~20 ms (a hard lag) in the range of ~5-10 keV, and becomes negative [time-lag of -(20-70) ms] above ~10 keV. The different QPO theoretical models are summarized and discussed. In the end, we suggest that these energy-dependent timing features as well as the origin of mHz QPOs in Cen X-3 may be ascribed to an instability when the accretion disc is truncated near the corotation radius. |
| 电子版国际标准刊号 | 1365-2966 |
| 语种 | 英语 |
| WOS记录号 | WOS:000861520400010 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299892]  |
| 专题 | 高能物理研究所_粒子天体物理中心 高能物理研究所_实验物理中心 硬X射线调制望远镜卫星 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Liu, Q.,Wang, W.,Chen, X.,et al. Detection of a quasi-periodic oscillation at 40 mHz in Cen X-3 with Insight-HXMT[J]. Monthly Notices of the Royal Astronomical Society,2022,516(4):5579. |
| APA | Liu, Q..,Wang, W..,Chen, X..,Yang, W..,Lu, F. J..,...&Zhang, S. N..(2022).Detection of a quasi-periodic oscillation at 40 mHz in Cen X-3 with Insight-HXMT.Monthly Notices of the Royal Astronomical Society,516(4),5579. |
| MLA | Liu, Q.,et al."Detection of a quasi-periodic oscillation at 40 mHz in Cen X-3 with Insight-HXMT".Monthly Notices of the Royal Astronomical Society 516.4(2022):5579. |
入库方式： OAI收割
来源：高能物理研究所
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