Relation of Cyclotron Resonant Energy and Luminosity in a Strongly Magnetized Neutron Star GRO J1008-57 Observed by Insight-HXMT
文献类型：期刊论文
| 作者 | Chen, X.; Wang, W.; Tang, Y. M.; Ding, Y. Z.; Tuo, Y. L.; Mushtukov, A. A.; Nishimura, O.; Zhang, S. N.; Ge, M. Y.; Song, L. M. |
| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2021 |
| 卷号 | 919页码:33 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ac1268 |
| 英文摘要 | Cyclotron line scattering features are detected in a few tens of X-ray pulsars (XRPs) and used as direct indicators of a strong magnetic field at the surface of accreting neutron stars (NSs). In a few cases, cyclotron lines are known to be variable with the accretion luminosity of XRPs. It is accepted that the observed variations of cyclotron line scattering features are related to variations of geometry and dynamics of accretion flow above the magnetic poles of an NS. A positive correlation between the line centroid energy and luminosity is typical for subcritical XRPs, where the accretion results in hot spots at the magnetic poles. The negative correlation was proposed to be a specific feature of bright supercritical XRPs, where radiation pressure supports accretion columns above the stellar surface. The cyclotron line in the spectra of the Be-transient XRP GRO J1008-57 is detected at energies from ~75 to 90 keV, the highest observed energy of a cyclotron line feature in XRPs. We report the peculiar relation of cyclotron line centroid energies with luminosity in GRO J1008-57 during the Type II outburst in 2017 August observed by Insight-HXMT. The cyclotron line energy was detected to be negatively correlated with the luminosity at 3.2 × 1037 erg s-1 < L < 4.2 × 1037 erg s-1 and positively correlated at L ? 5 × 1037 erg s-1. We speculate that the observed peculiar behavior of a cyclotron line would be due to variations of accretion channel geometry. |
| WOS记录号 | WOS:000697832100001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/289802]  |
| 专题 | 高能物理研究所_粒子天体物理中心 硬X射线调制望远镜卫星 |
| 推荐引用方式 GB/T 7714 | Chen, X.,Wang, W.,Tang, Y. M.,et al. Relation of Cyclotron Resonant Energy and Luminosity in a Strongly Magnetized Neutron Star GRO J1008-57 Observed by Insight-HXMT[J]. The Astrophysical Journal,2021,919:33. |
| APA | Chen, X..,Wang, W..,Tang, Y. M..,Ding, Y. Z..,Tuo, Y. L..,...&Qu, J. L..(2021).Relation of Cyclotron Resonant Energy and Luminosity in a Strongly Magnetized Neutron Star GRO J1008-57 Observed by Insight-HXMT.The Astrophysical Journal,919,33. |
| MLA | Chen, X.,et al."Relation of Cyclotron Resonant Energy and Luminosity in a Strongly Magnetized Neutron Star GRO J1008-57 Observed by Insight-HXMT".The Astrophysical Journal 919(2021):33. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。