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arXiv 2510.08367astro-ph.HE
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FRB20240114A 的宽带研究:基于埃费尔斯贝格 100 米射电望远镜

A broadband study of FRB20240114A with the Effelsberg 100-m radio telescope

P. Limaye, L. G. Spitler, N. Manaswini, J. Benáček, F. Eppel, M. Kadler, L. Nicotera, J. Wongphechauxsorn

AI总结:

本研究利用埃费尔斯贝格100米望远镜对重复快速射电暴FRB20240110A进行宽带观测,探测到超700个暴发,揭示四种频谱形态、带限发射及约10毫秒特征时标,深化了对重复暴频率漂移和变异的理解。

摘要:

我们展示了埃费尔斯贝格 100 米望远镜对由 CHIME/FRB 于 2024 年 1 月发现的超活跃重复快速射电暴源 FRB 20240110A 的观测结果。使用覆盖 1.3-6.0 GHz 的超宽带(UBB)接收机,我们在四个观测时段内探测到超过 700 个独立的暴发。对其时间和频谱特性的全面分析揭示了四种不同的频谱-时间形态,包括简单、复杂和频率漂移结构。在整个 UBB 频带内未探测到任何暴发,证实了重复快速射电暴典型的带限发射特性。我们发现暴发宽度存在适度的频率演化,但分数带宽保持恒定,并且暴发率存在强烈变化,这可能受到闪烁的影响。等待时间分布表明暴发事件主要为独立事件,偶尔的聚集暗示了约 10 毫秒的特征发射时标。此外,本研究还提供了等待时间分布的多频率分析,为重复快速射电暴中常见的复杂频率漂移提供了新的见解。这些宽带观测提供了 FRB 20240110A 频率依赖性暴发行为的详细视图,并深入揭示了重复快速射电暴发射的变异性与时间结构。

英文摘要:

We present Effelsberg 100-m telescope observations of the hyperactive repeating fast radio burst source FRB 20240110A, discovered by CHIME/FRB in January 2024. Using the Ultra BroadBand (UBB) receiver, spanning 1.3-6.0 GHz, we detected over 700 unique bursts across four observing epochs. A comprehensive analysis of their temporal and spectral properties reveals four distinct spectro-temporal morphologies, including simple, complex and frequency-drifting structures. No bursts were detected across the full UBB band, confirming the band-limited emission typical of repeating FRBs. We find modest frequency evolution in burst widths but constant fractional bandwidths, and strong variability in burst rates that may be influenced by scintillation. The waiting-time distributions indicate predominantly independent burst events, with occasional clustering suggesting a characteristic emission timescale of $\sim$10 ms. Additionally, this study presents a multi-frequency analysis of waiting-time distributions, offering new insights into the complex frequency drifts commonly observed in repeating FRBs. These broadband observations provide a detailed view of the frequency-dependent burst behavior of FRB 20240110A and offer insights into the variability and temporal structure of repeating FRB emission.

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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