| An Eclipsing Black Widow Pulsar in NGC 6712 | |
| Yan,Zhen1,2,3; Pan,Zhi-chen2,4,5; Ransom,Scott M.6; Lorimer,Duncan R.7,8; Qian,Lei4,5; Wang,Pei4,5; Shen,Zhi-qiang1,2,3; Li,Di2,4,9; Jiang,Peng2,4,5; Luo,Jin-Tao2,10; Liu,Jie1,2; Huang,Zhi-peng1,2 | |
| 2021-11-01 | |
| 发表期刊 | The Astrophysical Journal
 |
| ISSN | 0004-637X |
| 卷号 | 921期号:2 |
| 摘要 | Abstract We report the discovery of the first radio pulsar associated with NGC 6712, an eclipsing black widow (BW) pulsar, J1853–0842A, found by high-sensitivity searches using the Five-hundred-meter Aperture Spherical radio Telescope. This 2.15 ms pulsar is in a 3.56 hr compact circular orbit with a very low mass companion likely of mass 0.018 to 0.036 M ⊙ and exhibits eclipsing of the pulsar signal. Though the distance to PSR J1853–0842A predicted from its dispersion measure (155.125 ± 0.004 cm?3 pc) and Galactic free electron density models are about 30% smaller than that of NGC 6712 obtained from interstellar reddening measurements, this is likely due to limited knowledge about the spiral arms and Scutum stellar cloud in this direction. Follow-up timing observations spanning 445 days allow us to localize the pulsar’s position to be 0.14 core radii from the center of NGC 6712 and measure a negative spin-down rate for this pulsar of ?2.39(2) × 10?21 s s?1. The latter cannot be explained without the acceleration of the globular cluster (GC) and decisively supports the association between PSR J1853–0842A and NGC 6712. Considering the maximum GC acceleration, the Galactic acceleration, and the Shklovskii effect, we place an upper limit on the intrinsic spin-down rate to be 1.11 × 10?20 s s?1. From an analysis of the eclipsing observations, we estimate the electron density of the eclipse region to be about 1.88 × 106 cm?3. We also place an upper limit of the accretion rate from the companion at about 3.05 × 10?13 M ⊙ yr?1, which is comparable with some other BWs. |
| DOI | 10.3847/1538-4357/ac25eb |
| 语种 | 英语 |
| WOS记录号 | IOP:apj_921_2_120 |
| 出版者 | The American Astronomical Society |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://210.72.145.45/handle/361003/14016 |
| 专题 | 守时理论与方法研究室 |
| 通讯作者 | Yan,Zhen |
| 作者单位 | 1.Shanghai Astronomical Observatory, Chinese Academy of Sciences, NO. 80 Nandan Road, Shanghai 200030, People's Republic of China; yanzhen@shao.ac.cn 2.University of Chinese Academy of Sciences, No.19A Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China 3.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, 10 Yuanhua Road, Nanjing, JiangSu 210033, People's Republic of China 4.National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100101, People's Republic of China 5.CAS Key Laboratory of FAST, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People's Republic of China 6.National Radio Astronomy Observatory, Charlottesville, VA 22903, USA 7.Department of Physics and Astronomy, West Virginia University, Morgantown, WV 26506, USA 8.Center for Gravitational Waves and Cosmology, West Virginia University, Chestnut Ridge Research Building, Morgantown, WV 26505, USA 9.NAOC-UKZN Computational Astrophysics Centre, University of KwaZulu-Natal, Durban 4000, South Africa 10.National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Yan,Zhen,Pan,Zhi-chen,Ransom,Scott M.,et al. An Eclipsing Black Widow Pulsar in NGC 6712[J]. The Astrophysical Journal,2021,921(2). |
| APA | Yan,Zhen.,Pan,Zhi-chen.,Ransom,Scott M..,Lorimer,Duncan R..,Qian,Lei.,...&Huang,Zhi-peng.(2021).An Eclipsing Black Widow Pulsar in NGC 6712.The Astrophysical Journal,921(2). |
| MLA | Yan,Zhen,et al."An Eclipsing Black Widow Pulsar in NGC 6712".The Astrophysical Journal 921.2(2021). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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