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arXiv 1901.04525astro-ph.HEastro-ph.IM
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重复快速射电暴的第二个源

A Second Source of Repeating Fast Radio Bursts

FRB Collaboration, M. Amiri, K. Bandura, M. Bhardwaj, P. Boubel, M. M. Boyce, P. J. Boyle, C. Brar, M. Burhanpurkar, T. Cassanelli, P. Chawla, J. F. Cliche, D. … 展开作者

FRB Collaboration, M. Amiri, K. Bandura, M. Bhardwaj, P. Boubel, M. M. Boyce, P. J. Boyle, C. Brar, M. Burhanpurkar, T. Cassanelli, P. Chawla, J. F. Cliche, D. Cubranic, M. Deng, N. Denman, M. Dobbs, M. Fandino, E. Fonseca, B. M. Gaensler, A. J. Gilbert, A. Gill, U. Giri, D. C. Good, M. Halpern, D. S. Hanna, A. S. Hill, G. Hinshaw, C. Höfer, A. Josephy, V. M. Kaspi, T. L. Landecker, D. A. Lang, H. -H. Lin, K. W. Masui, R. Mckinven, J. Mena-Parra, M. Merryfield, D. Michilli, N. Milutinovic, C. Moatti, A. Naidu, L. B. Newburgh, C. Ng, C. Patel, U. -L. Pen, T. Pinsonneault-Marotte, Z. Pleunis, M. Rafiei-Ravandi, M. Rahman, S. M. Ransom, A. Renard, P. Scholz, J. R. Shaw, S. R. Siegel, K. M. Smith, I. H. Stairs, S. P. Tendulkar, I. Tretyakov, K. Vanderlinde, P. Yadav

摘要:

一个重复的快速射电暴(FRB)源FRB 121102的发现,消除了这个源涉及灾难性事件的模型。尽管最近发现了许多FRB并进行了随访,但尚未检测到其他重复FRB,这表明重复者在FRB人群中可能很罕见。在这里,我们报告了对FRB 180814.J0422+73的六次重复爆发的检测,这是加拿大氢强度测绘实验(CHIME)FRB项目在2018年7月和8月的预调试阶段检测到的13个FRB之一。这些重复爆发与来自天空中单一位置的一致,具有相同的色散测量(DM),约189 pc cm-3。这个DM大约是预期的银河柱密度的两倍,意味着源红移的上限为0.1,至少比FRB 121102近2倍。在一些重复爆发中,我们观察到子脉冲频率结构,漂移和光谱变化,让人想起在FRB 121102中看到的,这表明类似的发射机制和/或传播效应。这第二个中继器是在CHIME/FRB发现的前几个中继器中发现的,这表明存在-CHIME/FRB和其他宽视场,灵敏的射电望远镜将发现-大量的重复FRB。

英文摘要:

The discovery of a repeating Fast Radio Burst (FRB) source, FRB 121102, eliminated models involving cataclysmic events for this source. No other repeating FRB has yet been detected in spite of many recent FRB discoveries and follow-ups, suggesting repeaters may be rare in the FRB population. Here we report the detection of six repeat bursts from FRB 180814.J0422+73, one of the 13 FRBs detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) FRB project during its pre-commissioning phase in July and August 2018. These repeat bursts are consistent with originating from a single position on the sky, with the same dispersion measure (DM), ~189 pc cm-3. This DM is approximately twice the expected Milky Way column density, and implies an upper limit on the source redshift of 0.1, at least a factor of ~2 closer than FRB 121102. In some of the repeat bursts, we observe sub-pulse frequency structure, drifting, and spectral variation reminiscent of that seen in FRB 121102, suggesting similar emission mechanisms and/or propagation effects. This second repeater, found among the first few CHIME/FRB discoveries, suggests that there exists -- and that CHIME/FRB and other wide-field, sensitive radio telescopes will find -- a substantial population of repeating FRBs.

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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