Discovery of a Gamma-Ray Black Widow Pulsar by GPU-accelerated Einstein@Home
文献类型：期刊论文
| 作者 | Nieder,L.25,26; Clark,C. J.27; Kandel,D.24; Romani,R. W.24; Bassa,C. G.15; Allen,B.7,25,26; Ashok,A.25,26; Cognard,I.8,9; Fehrmann,H.25,26; Freire,P.10 |
| 刊名 | The Astrophysical Journal Letters
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 902期号:2 |
| ISSN号 | 2041-8205 |
| 关键词 | Gamma-ray sources Millisecond pulsars Neutron stars Binary pulsars |
| DOI | 10.3847/2041-8213/abbc02 |
| 英文摘要 | Abstract We report the discovery of 1.97 ms period gamma-ray pulsations from the 75 minute orbital-period binary pulsar now named PSR J1653?0158. The associated Fermi Large Area Telescope gamma-ray source 4FGL J1653.6?0158 has long been expected to harbor a binary millisecond pulsar. Despite the pulsar-like gamma-ray spectrum and candidate optical/X-ray associations—whose periodic brightness modulations suggested an orbit—no radio pulsations had been found in many searches. The pulsar was discovered by directly searching the gamma-ray data using the GPU-accelerated Einstein@Home distributed volunteer computing system. The multidimensional parameter space was bounded by positional and orbital constraints obtained from the optical counterpart. More sensitive analyses of archival and new radio data using knowledge of the pulsar timing solution yield very stringent upper limits on radio emission. Any radio emission is thus either exceptionally weak, or eclipsed for a large fraction of the time. The pulsar has one of the three lowest inferred surface magnetic-field strengths of any known pulsar with Bsurf?≈?4?×?107 G. The resulting mass function, combined with models of the companion star’s optical light curve and spectra, suggests a pulsar mass ?2 M⊙. The companion is lightweight with mass ～0.01 M⊙, and the orbital period is the shortest known for any rotation-powered binary pulsar. This discovery demonstrates the Fermi Large Area Telescope's potential to discover extreme pulsars that would otherwise remain undetected. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:2041-8205-902-2-ABBC02 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62914]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Nieder,L. |
| 作者单位 | 1.Résidence Le Dauphiné, rue Jean Bleuzen, Vanves, France 2.Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK 3.National Centre for Radio Astrophysics, Tata Institute of Fundamental Research, Pune 411 007, India 4.South African Radio Astronomy Observatory, 2 Fir Street, Black River Park, Observatory 7925, South Africa 5.NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA 6.Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain 7.Department of Physics, University of Wisconsin–Milwaukee, P.O. Box 413, Milwaukee, WI 53201, USA 8.Laboratoire de Physique et Chimie de l’Environnement et de l’Espace, Université d’Orléans/CNRS, F-45071 Orléans Cedex 02, France 9.Station de radioastronomie de Nan?ay, Observatoire de Paris, CNRS/INSU, F-18330 Nan?ay, France 10.Max-Planck-Institut für Radioastronomie, auf dem Hügel 69, 53121 Bonn, Germany |
| 推荐引用方式 GB/T 7714 | Nieder,L.,Clark,C. J.,Kandel,D.,et al. Discovery of a Gamma-Ray Black Widow Pulsar by GPU-accelerated Einstein@Home[J]. The Astrophysical Journal Letters,2020,902(2). |
| APA | Nieder,L..,Clark,C. J..,Kandel,D..,Romani,R. W..,Bassa,C. G..,...&Steltner,B..(2020).Discovery of a Gamma-Ray Black Widow Pulsar by GPU-accelerated Einstein@Home.The Astrophysical Journal Letters,902(2). |
| MLA | Nieder,L.,et al."Discovery of a Gamma-Ray Black Widow Pulsar by GPU-accelerated Einstein@Home".The Astrophysical Journal Letters 902.2(2020). |
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来源：国家天文台
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