Simultaneous Constraints on the Mass and Radius of Aql X-1 from Quiescence and X-Ray Burst Observations
文献类型：期刊论文
| 作者 | Qu JL(屈进禄) ; Xu, RX; Li, ZS; Falanga, M; Chen, L; Qu, JL
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2017 |
| 卷号 | 845期号:1页码:8 |
| 关键词 | equation of state stars: neutron X-rays: binaries X-rays: bursts X-rays: individual (Aql X-1) |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aa7d0b |
| 文献子类 | Article |
| 英文摘要 | The measurement of neutron star mass and radius is one of the most direct ways to distinguish between various dense matter equations of state. The mass and radius of accreting neutron stars hosted in low-mass X-ray binaries can be constrained by several methods, including photospheric radius expansion from type I X-ray bursts and from quiescent spectra. In this paper, we apply for the first time these two methods simultaneously to constrain the mass and radius of Aql X-1. The quiescent spectra from Chandra and XMM-Newton, and photospheric radius expansion bursts from RXTE are used. The determination of the mass and radius of Aql X-1 is also used to verify the consistency between the two methods and to narrow down the uncertainties of the neutron star mass and radius. It is found that the distance to Aql X-1 should be in the range of 4.0-5.75 kpc, based on the overlapping confidence regions between photospheric radius expansion burst and quiescent spectra methods. In addition, we show that the mass and radius determined for the compact star in Aql X-1 are compatible with strange star equations of state and conventional neutron star models. |
| 电子版国际标准刊号 | 1538-4357 |
| WOS关键词 | NEUTRON-STAR MASSES ; EQUATION-OF-STATE ; PULSE-SHAPE ; AQUILA X-1 ; SPECTROSCOPIC MEASUREMENTS ; SYSTEMATIC UNCERTAINTIES ; COMPTONIZED SPECTRA ; MODEL ATMOSPHERES ; NUCLEAR-EQUATION ; TIMING-EXPLORER |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000406918800008 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284713]  |
| 专题 | 高能物理研究所_理论物理室 高能物理研究所_粒子天体物理中心 |
| 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 | Qu JL,Xu, RX,Li, ZS,et al. Simultaneous Constraints on the Mass and Radius of Aql X-1 from Quiescence and X-Ray Burst Observations[J]. ASTROPHYSICAL JOURNAL,2017,845(1):8. |
| APA | 屈进禄,Xu, RX,Li, ZS,Falanga, M,Chen, L,&Qu, JL.(2017).Simultaneous Constraints on the Mass and Radius of Aql X-1 from Quiescence and X-Ray Burst Observations.ASTROPHYSICAL JOURNAL,845(1),8. |
| MLA | 屈进禄,et al."Simultaneous Constraints on the Mass and Radius of Aql X-1 from Quiescence and X-Ray Burst Observations".ASTROPHYSICAL JOURNAL 845.1(2017):8. |
入库方式： OAI收割
来源：高能物理研究所
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