An Extreme Radio Fluctuation of Pulsar B1929$+$10
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arXiv
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| Format: | Preprint |
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2024
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| author | Wang, Zhengli Cao, Shunshun Lu, Jiguang Liu, Yulan Shi, Xun Jiang, Jinchen Liang, Enwei Wang, Weiyang Xu, Heng Xu, Renxin |
| author_facet | Wang, Zhengli Cao, Shunshun Lu, Jiguang Liu, Yulan Shi, Xun Jiang, Jinchen Liang, Enwei Wang, Weiyang Xu, Heng Xu, Renxin |
| contents | We report the detection of an extreme flux decrease accompanied by clear dispersion measure (DM) and rotation measure (RM) variations for pulsar B1929+10 during the 110-minute radio observation with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The radio flux decreases by 2 to 3 orders of magnitude within a rapid time scale of about 20 minutes. Meanwhile, the variations of DM and RM are approximately 0.05 pc cm$^{-3}$ and 0.7 rad m$^{-2}$, respectively. Frequency-dependent analysis of DM indicates an extremely weak chromatic DM feature, which does not notably affect the radiative behavior detected. Moreover, the pulsar timing analysis shows an additional time delay from 100 $μ$s to 400 $μ$s in the event. These results are speculated to be due to the eclipse and bend for the radio emission of pulsar B1929+10 by a highly dense outflow from the pulsar. This not only impacts the intrinsic radio emission feature but also affects the pulsar timing behavior. Nevertheless, a plasma lens effect lasting around 20 minutes could also be responsible for the event. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_16816 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | An Extreme Radio Fluctuation of Pulsar B1929$+$10 Wang, Zhengli Cao, Shunshun Lu, Jiguang Liu, Yulan Shi, Xun Jiang, Jinchen Liang, Enwei Wang, Weiyang Xu, Heng Xu, Renxin High Energy Astrophysical Phenomena We report the detection of an extreme flux decrease accompanied by clear dispersion measure (DM) and rotation measure (RM) variations for pulsar B1929+10 during the 110-minute radio observation with the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The radio flux decreases by 2 to 3 orders of magnitude within a rapid time scale of about 20 minutes. Meanwhile, the variations of DM and RM are approximately 0.05 pc cm$^{-3}$ and 0.7 rad m$^{-2}$, respectively. Frequency-dependent analysis of DM indicates an extremely weak chromatic DM feature, which does not notably affect the radiative behavior detected. Moreover, the pulsar timing analysis shows an additional time delay from 100 $μ$s to 400 $μ$s in the event. These results are speculated to be due to the eclipse and bend for the radio emission of pulsar B1929+10 by a highly dense outflow from the pulsar. This not only impacts the intrinsic radio emission feature but also affects the pulsar timing behavior. Nevertheless, a plasma lens effect lasting around 20 minutes could also be responsible for the event. |
| title | An Extreme Radio Fluctuation of Pulsar B1929$+$10 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2410.16816 |