Reciprocating Magnetic Fields in the Pulsar Wind Observed from the Black Widow Pulsar J1720-0534
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Published:2023-09-19
Issue:10
Volume:23
Page:105005
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ISSN:1674-4527
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Container-title:Research in Astronomy and Astrophysics
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language:
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Short-container-title:Res. Astron. Astrophys.
Author:
Miao Chen-ChenORCID, Blackmon Victoria, Zhu Wei-Wei, Li Dong-Zi, Ge Ming-Yu, You Xiao-Peng, McLaughlin Maura, Li Di, Wang Na, Wang Pei, Niu Jia-RuiORCID, Cruces M., Yuan Jian-Ping, Bai Jun-Tao, Champion D. J., Chen Yu-Tong, Chi Ming-Min, Freire P. C. C., Feng Yi, Gan Zhen-Ye, Kramer M., Kou Fei-Fei, Li Yu-Xi, Miao Xue-Li, Meng Ling-Qi, Niu Chen-Hui, Sun Sheng-Nan, Sun Zhong-Yi, Tedila H. M., Wang Shuang-Qiang, Wu Qing-Dong, Wang Jing-Bo, Wen Zhi-GangORCID, Wang Shen, Wang Ya-Biao, Wang Cheng-Jie, Xue Meng-YaoORCID, Yue You-Ling, Yuan Mao, Yao Ju-Mei, Yan Wen-MingORCID, Zhao Ru-Shuang, Zhang Lei, Zhao De
Abstract
Abstract
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 × 103 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.
Subject
Space and Planetary Science,Astronomy and Astrophysics
Cited by
1 articles.
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1. Convective dynamos of black widow companions;Monthly Notices of the Royal Astronomical Society;2023-08-17
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