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 | Li, Zhaosheng1,2,3; Falanga, Maurizio2; Chen, Li4; Qu, Jinlu5; Xu, Renxin6,7,8 |
| 刊名 | Astrophysical journal
 |
| 出版日期 | 2017-08-10 |
| 卷号 | 845期号:1页码:13 |
| ISSN号 | 0004-637X |
| 关键词 | Equation of state Stars: neutron X-rays: binaries X-rays: bursts X-rays: individual (aql x-1) |
| DOI | 10.3847/1538-4357/aa7d0b |
| 通讯作者 | Li, zhaosheng(lizhaosheng@xtu.edu.cn) |
| 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. |
| 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 |
| WOS类目 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000406918800008 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2176935 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Li, Zhaosheng |
| 作者单位 | 1.Xiangtan Univ, Dept Phys, Xiangtan 411105, Peoples R China 2.Int Space Sci Inst, Hallerstr 6, CH-3012 Bern, Switzerland 3.Univ Bern, Inst Theoret Phys, Albert Einstein Ctr Fundamental Phys, Lab High Energy Phys, Bern, Switzerland 4.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 5.Chinese Acad Sci, Inst High Energy Phys, Lab Particle Astrophys, Beijing 100049, Peoples R China 6.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 7.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 8.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zhaosheng,Falanga, Maurizio,Chen, Li,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):13. |
| APA | Li, Zhaosheng,Falanga, Maurizio,Chen, Li,Qu, Jinlu,&Xu, Renxin.(2017).Simultaneous constraints on the mass and radius of aql x-1 from quiescence and x-ray burst observations.Astrophysical journal,845(1),13. |
| MLA | Li, Zhaosheng,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):13. |
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来源：高能物理研究所
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