Reciprocating Magnetic Fields in the Pulsar Wind Observed from the Black Widow Pulsar J1720-0534  

作　　者：Chen-Chen Miao Victoria Blackmon Wei-Wei Zhu Dong-Zi Li Ming-Yu Ge Xiao-Peng You Maura McLaughlin Di Li Na Wang Pei Wang Jia-Rui Niu M.Cruces Jian-Ping Yuan Jun-Tao Bai D.J.Champion Yu-Tong Chen Ming-Min Chi P.C.C.Freire Yi Feng Zhen-Ye Gan M.Kramer Fei-Fei Kou Yu-Xi Li Xue-Li Miao Ling-Qi Meng Chen-Hui Niu Sheng-Nan Sun Zhong-Yi Sun H.M.Tedila Shuang-Qiang Wang Qing-Dong Wu Jing-Bo Wang Zhi-Gang Wen Shen Wang Ya-Biao Wang Cheng-Jie Wang Meng-Yao Xue You-Ling Yue Mao Yuan Ju-Mei Yao Wen-Ming Yan Ru-Shuang Zhao Lei Zhang De Zhao 

机构地区：[1]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]School of Astronomy and Space Science,University of Chinese Academy of Sciences,Beijing 100049,China [3]West Virginia University,1500 University Ave,Morgantown,WV 26506,USA [4]Institute for Frontiers in Astronomy and Astrophysics,Beijing Normal University,Beijing 102206,China [5]Cahill Center for Astronomy and Astrophysics,California Institute of Technology,1216 E California Boulevard,Pasadena,CA 91125,USA [6]Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [7]School of Physical Science and Technology,Southwest University,Chongqing 400715,China [8]Research Center for Intelligent Computing Platforms,Zhejiang Laboratory,Hangzhou 311100,China [9]Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China [10]Max-Planck Institut für Radioastronomie,Auf dem Hügel 69,D-53121 Bonn,Germany [11]School of Computer Science,Fudan University,Shanghai 200433,China [12]Tencent Youtu Lab,Shanghai 200233,China [13]College of Physical Science and Technology,Central China Normal University,Wuhan 430079,China [14]Institute of Optoelectronic Technology,Lishui University,Lishui 323000,China [15]Guizhou Normal University,Guiyang 550001,China

出　　处：《Research in Astronomy and Astrophysics》2023年第10期255-266,共12页天文和天体物理学研究（英文版）

基　　金：The Parkes Radio Telescope (Murriyang) is part of the Australia Telescope National Facility, which is funded by the Australian Government for operation as a National Facility managed by CSIRO;supported by the National Natural Science Foundation of China (NSFC) grant Nos. 12041303, 12041304, 11873067, 12133004, 12203045, 12203070, 12203072, 12103013, U2031117 and T2241020;the CAS-MPG LEGACY project and the National SKA Program of China No. 2020SKA0120200;the Foundation of Science and Technology of Guizhou Province No. ((2021)023);the Foundation of Guizhou Provincial Education Department (No.KY(2021)303);the National Key Research and Development Program of China Nos. 2022YFC2205202 and 2022YFC2205203;the Major Science and Technology Program of Xinjiang Uygur Autonomous Region Nos. 2022A03013-1, 2022A03013-3 and 2022A03013-4;the National Key Research and Development Program of China No. 2022YFC2205203;the 2021 project Xinjiang Uygur autonomous region of China for Tianshan elites and the Youth Innovation Promotion Association of CAS under No. 2023069;support from the Youth Innovation Promotion Association CAS (id. 2021055);CAS Project for Young Scientists in Basic Research (grant YSBR-006);the Cultivation Project for FAST Scientific Payoff and Research Achievement of CAMS-CAS;support from Zhejiang Provincial Natural Science Foundation of China under grant No. LY23A030001;supported by the NSF Physics Frontiers Center award number 2020265。

摘　　要：We report the radio observations of the eclipsing black widow pulsar J1720-0534, a 3.26 ms pulsar in orbit with a low mass companion of mass 0.029 to 0.034 M⊙. We obtain the phase-connected timing ephemeris and polarization profile of this millisecond pulsar(MSP) using the Five-hundred-meter Aperture Spherical radio Telescope(FAST), the Green Bank Telescope(GBT), and the Parkes Telescope. For the first time from such a system, an oscillatory polarization angle change was observed from a particular eclipse egress with partial depolarization, indicating 10-milliGauss-level reciprocating magnetic fields oscillating in a length scale of 5 ×10^(3)km(assuming an orbital inclination angle of 90°) outside the companion's magnetosphere. The dispersion measure variation observed during the ingresses and egresses shows the rapid raising of the electron density in the shock boundary between the companion's magnetosphere and the surrounding pulsar wind. We suggest that the observed oscillatory magnetic fields originate from the pulsar wind outside the companion's magnetosphere.

关 键 词：(stars:)pulsars:general (stars:)pulsars:individual(J1720-0534) (stars:)binaries:eclipsing 

分 类 号：P145.6[天文地球—天体物理]