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VLBI astrometry on the white dwarf pulsar AR Scorpii

文献类型：期刊论文

作者Jiang, Pengfei4,5; Cui, Lang4,6; Yang, Jun7; Zhang, Bo8; Xu, Shuangjing2,8; Shu, Fengchun8; Jiang, Wu8; Chen, Wen1,5; Li, Guanghui4; Xia, Bo8
刊名Monthly Notices of the Royal Astronomical Society
出版日期2023-02-01
卷号520期号:2页码:2942-2951
关键词techniques: high angular resolution parallaxes pulsars: individual: AR Sco white dwarfs radio continuum: stars x-ray optical observations emission geometry radio-emission black-hole binary mass sco kinematics herculis Astronomy & Astrophysics
ISSN号0035-8711
DOI10.1093/mnras/stad327
产权排序1
文献子类Article
英文摘要AR Scorpii (AR Sco), the only-known radio-pulsing white dwarf binary, shows unusual pulsating emission at the radio, infrared, optical, and ultraviolet bands. To determine its astrometric parameters at the radio band independently, we conducted multi-epoch Very Long Baseline Interferometry (VLBI) phase-referencing observations with the European VLBI Network at 5 GHz and the Chinese VLBI Network plus the Warkworth 30-m telescope (New Zealand) at 8.6 GHz. By using the differential VLBI astrometry, we provide high-precision astrometric measurements on the parallax (pi = 8.52(-0.07)(+0.04) mas) and proper motion (mu(alpha) = 9.48(-0.07)(+0.04) mas yr(-1), mu(delta) = -51.32(-0.38)(+0.22) mas yr (-1)). The new VLBI results agree with the optical Gaia astrometry. Our kinematic analysis reveals that the Galactic space velocities of AR Sco are quite consistent with that of both intermediate polars and polars. Combined with the previous tightest VLBI constraint on the size, our parallax distance suggests that the radio emission of AR Sco should be located within the light cylinder of its white dwarf.
语种英语
WOS记录号WOS:000941753400005
源URL[http://ir.xao.ac.cn/handle/45760611-7/6642]  
专题星系宇宙学研究团组
射电天文研究室_利用南山26米射电望远镜观测数据的文章
通讯作者Cui, Lang
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, Yunnan, P.R. China;
2.Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea;
3.School of Electronic and Electrical Engineering, Shangqiu Normal University, Wenhua Road 298, Shangqiu, Henan 476000, P. R. China
4.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150 Science 1-Street, 830011 Urumqi, P. R. China;
5.School of Astronomy and Space Science, University of Chinese Academy of Sciences, 100049 Beijing, P. R. China;
6.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, 150 Science 1-Street, 830011 Urumqi, P. R. China;
7.Department of Space, Earth and Environment, Chalmers University of Technology, Onsala Space Observatory, SE-439 92 Onsala, Sweden;
8.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 200030 Shanghai, P. R. China;
9.Institute for Radio Astronomy and Space Research, A uc kland University of Technology, Private Bag 92006, A uc kland 1142, New Zealand;
推荐引用方式
GB/T 7714		 Jiang, Pengfei,Cui, Lang,Yang, Jun,et al. VLBI astrometry on the white dwarf pulsar AR Scorpii[J]. Monthly Notices of the Royal Astronomical Society,2023,520(2):2942-2951.
APA Jiang, Pengfei.,Cui, Lang.,Yang, Jun.,Zhang, Bo.,Xu, Shuangjing.,...&An, Tao.(2023).VLBI astrometry on the white dwarf pulsar AR Scorpii.Monthly Notices of the Royal Astronomical Society,520(2),2942-2951.
MLA Jiang, Pengfei,et al."VLBI astrometry on the white dwarf pulsar AR Scorpii".Monthly Notices of the Royal Astronomical Society 520.2(2023):2942-2951.

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