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arXiv 2304.14697astro-ph.HE
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来自FRB 20220912A的闪烁弧

Scintillation Arc from FRB 20220912A

Zi-Wei Wu, Robert A. Main, Wei-Wei Zhu, Bing Zhang, Peng Jiang, Jia-Rui Niu, Jin-Lin Han, Di Li, Ke-Jia Lee, Dong-Zi Li, Yuan-Pei Yang, Fa-Yin Wang, Rui Luo, Pe… 展开作者

Zi-Wei Wu, Robert A. Main, Wei-Wei Zhu, Bing Zhang, Peng Jiang, Jia-Rui Niu, Jin-Lin Han, Di Li, Ke-Jia Lee, Dong-Zi Li, Yuan-Pei Yang, Fa-Yin Wang, Rui Luo, Pei Wang, Chen-Hui Niu, Heng Xu, Bo-Jun Wang, Wei-Yang Wang, Yong-Kun Zhang, Yi Feng, De-Jiang Zhou, Yong-Hua Xu, Can-Min Deng, Yu-Hao Zhu

AI总结:

本研究利用FAST数据在FRB 20220912A的二次谱中探测到闪烁弧,分析其散射介质更可能源于银河系,提出的方法可用于不规则爆发源的闪烁研究,助力理解星际环境。

摘要:

我们利用五百米口径球面射电望远镜(FAST)的数据,对快速射电暴(FRB)20220912A在2022年极端活跃期的星际闪烁进行了分析。我们在该FRB的二次谱中探测到一条闪烁弧,它以散射后的FRB信号的时间延迟和多普勒频移来表征功率。该弧表明,此次闪烁由电离星际介质(IISM)的一个高度局域化区域引发。我们的分析更支持该局域散射介质起源于银河系,但无法排除宿主星系起源的可能性。我们提出了探测闪烁弧的方法,该方法可普遍应用于爆发或脉冲间隔不规则的源。这些方法有助于阐明FRB周围及银河系内复杂的星际环境。

英文摘要:

We present the interstellar scintillation analysis of fast radio burst (FRB) 20220912A during its extremely active episode in 2022 using data from the Five-hundred-meter Aperture Spherical Radio Telescope (FAST). We detect a scintillation arc in the FRB's secondary spectrum, which describes the power in terms of the scattered FRB signals' time delay and Doppler shift. The arc indicates that the scintillation is caused by a highly localized region of the ionized interstellar medium (IISM). Our analysis favors a Milky Way origin for the localized scattering medium but cannot rule out a host galaxy origin. We present our method for detecting the scintillation arc, which can be applied generally to sources with irregularly spaced bursts or pulses. These methods could help shed light on the complex interstellar environment surrounding the FRBs and in our Galaxy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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