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arXiv · 2304.14697

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·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
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Abstract

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.

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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. 2023-04-28. Scintillation Arc from FRB 20220912A. https://doi.org/10.1007/s11433-023-2186-2

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