arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.10324astro-ph.HE
收藏

来自银河系磁星的明亮的毫秒持续时间的无线电爆发

A bright millisecond-duration radio burst from a Galactic magnetar

FRB Collaboration, B. C. Andersen, K. M. Bandura, M. Bhardwaj, A. Bij, M. M. Boyce, P. J. Boyle, C. Brar, T. Cassanelli, P. Chawla, T. Chen, J. -F. Cliche, A. C… 展开作者

FRB Collaboration, B. C. Andersen, K. M. Bandura, M. Bhardwaj, A. Bij, M. M. Boyce, P. J. Boyle, C. Brar, T. Cassanelli, P. Chawla, T. Chen, J. -F. Cliche, A. Cook, D. Cubranic, A. P. Curtin, N. T. Denman, M. Dobbs, F. Q. Dong, M. Fandino, E. Fonseca, B. M. Gaensler, U. Giri, D. C. Good, M. Halpern, A. S. Hill, G. F. Hinshaw, C. Höfer, A. Josephy, J. W. Kania, V. M. Kaspi, T. L. Landecker, C. Leung, D. Z. Li, H. -H. Lin, K. W. Masui, R. Mckinven, J. Mena-Parra, M. Merryfield, B. W. Meyers, D. Michilli, N. Milutinovic, A. Mirhosseini, M. Münchmeyer, A. Naidu, L. B. Newburgh, C. Ng, C. Patel, U. -L. Pen, T. Pinsonneault-Marotte, Z. Pleunis, B. M. Quine, M. Rafiei-Ravandi, M. Rahman, S. M. Ransom, A. Renard, P. Sanghavi, P. Scholz, J. R. Shaw, K. Shin, S. R. Siegel, S. Singh, R. J. Smegal, K. M. Smith, I. H. Stairs, C. M. Tan, S. P. Tendulkar, I. Tretyakov, K. Vanderlinde, H. Wang, D. Wulf, A. V. Zwaniga

摘要:

磁星是高度磁化的年轻中子星,偶尔会产生巨大的X射线和伽马射线爆发和耀斑。在我们银河系和麦哲伦星云中目前已知的大约30颗磁星中,有5颗表现出短暂的无线电脉动。快速射电暴(FRB)是从宇宙学距离到达的持续时间为毫秒的无线电波爆发。有人看到有人重复。重复FRB的一个主要模型是,它们是河外磁星,由其强烈的磁场提供动力。然而,对这个模型的一个挑战是,FRB的射电光度必须比已知的银河系磁星大许多个数量级。在这里,我们报告的检测非常强烈的无线电爆发从银河系磁星SGR 1935+2154使用加拿大氢强度测绘实验(CHIME)FRB项目。这个两个分量的明亮射电爆发的通量和SGR 1935+2154的估计距离一起意味着400-800 MHz的爆发能量为$\sim 3 \times 10^{34}$ erg,比迄今为止探测到的任何射电发射磁星都要亮三个数量级。这样一个来自附近星系的爆发将与典型的FRB无法区分。因此,这一事件在银河系磁星和FRB之间的无线电能隙中架起了一座桥梁,有力地支持了磁星是至少一些FRB起源的观点。

英文摘要:

Magnetars are highly magnetized young neutron stars that occasionally produce enormous bursts and flares of X-rays and gamma-rays. Of the approximately thirty magnetars currently known in our Galaxy and Magellanic Clouds, five have exhibited transient radio pulsations. Fast radio bursts (FRBs) are millisecond-duration bursts of radio waves arriving from cosmological distances. Some have been seen to repeat. A leading model for repeating FRBs is that they are extragalactic magnetars, powered by their intense magnetic fields. However, a challenge to this model has been that FRBs must have radio luminosities many orders of magnitude larger than those seen from known Galactic magnetars. Here we report the detection of an extremely intense radio burst from the Galactic magnetar SGR 1935+2154 using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) FRB project. The fluence of this two-component bright radio burst and the estimated distance to SGR 1935+2154 together imply a 400-800 MHz burst energy of $\sim 3 \times 10^{34}$ erg, which is three orders of magnitude brighter than those of any radio-emitting magnetar detected thus far. Such a burst coming from a nearby galaxy would be indistinguishable from a typical FRB. This event thus bridges a large fraction of the radio energy gap between the population of Galactic magnetars and FRBs, strongly supporting the notion that magnetars are the origin of at least some 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。

↑