An X-Ray-dim “Isolated” Neutron Star in a Binary?
文献类型：期刊论文
| 作者 | Lin,Jie2,8,9; Li,Chunqian1,7; Wang,Weiyang2,8,9; Xu,Heng6; Jiang,Jinchen6; Yang,Daoye1; Yaqup,Shahidin5; Iskanda,Abdusamatjan5; Ma,Shuguo5 ; Niu,Hubiao5
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| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2023-02-01 |
| 卷号 | 944期号:1页码:L4 |
| ISSN号 | 2041-8205 |
| DOI | 10.3847/2041-8213/acb54b |
| 产权排序 | 7 |
| 英文摘要 | Abstract We report the discovery of a dark companion to 2MASS J15274848+3536572 with an orbital period of 6.14 hr. Combining the radial velocity from LAMOST observations and modeling of the multiband light curve, one obtains a mass function of ?0.131 M ⊙, an inclination of 45 .° 20 ? 0 .° 20 + 0 .° 13 , and a mass ratio of 0.631 ? 0.003 + 0.014 , which demonstrate the binary nature of the dark companion with a mass of 0.98 ± 0.03M ⊙ and a main-sequence K9-M0 star of 0.62 ± 0.01 M ⊙. LAMOST optical spectra at a range of orbital phases reveal extra-peaked H α emission that suggests the presence of an accretion disk. The dark companion does not seem to be a white dwarf because of the lack of any observed dwarf nova outbursts in the long-term data archive, although a magnetic white dwarf cannot be excluded. Alternatively, we propose a scenario wherein the dark companion is a neutron star, but we have not detected radio pulsations or a single pulse from the system with the FAST (Five-hundred-meter Aperture Spherical radio Telescope), which hints at a radio-quiet compact object. If the dark companion is identified as a neutron star, it will be the nearest (～118 pc) and lightest neutron star. Furthermore, kinematic analysis of the system’s orbit in the galaxy may suggest its supernova event is associated with the radionuclide 60Fe signal observed from deep-sea crusts. This radio-quiet and X-ray-dim nearby neutron star may resemble an XDINS (X-ray-dim isolated neutron star) but in a binary. |
| 语种 | 英语 |
| WOS记录号 | IOP:APJL_944_1_L4 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/6253]  |
| 专题 | 新疆天文台_光学天文与技术应用研究室 光学天文与技术应用研究室_利用南山1米大视场望远镜（NOWT）观测数据的文章 |
| 通讯作者 | Xu,Renxin |
| 作者单位 | 1.CAS Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China sjr@nao.cas.cn 2.Department of Astronomy, Peking University, Beijing 100871, People's Republic of China; r.x.xu@pku.edu.cn 3.Departamento de Astronom′?a, Universidad de Chile, Casilla 36-D, Santiago, Chile 4.Armagh Observatory and Planetarium, College Hill, Armagh BT61 9DG, UK 5.XinJiang Astronomical Observatory, Chinese Academy of Sciences, People's Republic of China 6.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China 7.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 8.Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People's Republic of China 9.State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Lin,Jie,Li,Chunqian,Wang,Weiyang,et al. An X-Ray-dim “Isolated” Neutron Star in a Binary?[J]. The Astrophysical Journal Letters,2023,944(1):L4. |
| APA | Lin,Jie.,Li,Chunqian.,Wang,Weiyang.,Xu,Heng.,Jiang,Jinchen.,...&Xu,Renxin.(2023).An X-Ray-dim “Isolated” Neutron Star in a Binary?.The Astrophysical Journal Letters,944(1),L4. |
| MLA | Lin,Jie,et al."An X-Ray-dim “Isolated” Neutron Star in a Binary?".The Astrophysical Journal Letters 944.1(2023):L4. |
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