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Scintillation Arc from FRB 20220912A

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arxiv 2304.14697 v2 pith:6M3LGG5M submitted 2023-04-28 astro-ph.HE

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
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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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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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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Detection of Partial Coherence due to Multipath Propagation for FRB 20220413B with CHIME/FRB

    astro-ph.HE 2025-12 conditional novelty 6.0

    FRB 20220413B's components share a common Milky Way scintillation pattern but show no phase-coherent lensing signature, so the complex morphology is not confirmed as plasma lensing.

  2. Simulating FRB Morphologies and Coherent Phase Correlation Signatures from Multi-Plane Astrophysical Lensing

    astro-ph.HE 2024-07 unverdicted novelty 5.0

    Simulation tool for multi-plane lensing of FRB point sources using coherent geometric optics on a spatial grid to produce morphologies and phase correlation signatures.