坍缩星起源最短伽马射线暴的发现与确认
高能天体物理现象
2022-03-23 v2
摘要
伽马射线暴（GRBs）是宇宙中最明亮和能量最高的事件之一。GRB 的持续时间与硬度分布有两个簇，现在已知反映（至少）两种不同的前身星。短硬 GRB（SGRBs；T90 < 2 s）来自致密双星并合，而长软 GRB（LGRBs；T90 > 2 s）归因于特殊大质量恒星（坍缩星）的坍缩。SN 1998bw/GRB 980425 的发现标志着 LGRB 与坍缩星的首次关联，而 AT 2017gfo/GRB 170817A/GW170817 标志着 SGRB 与双中子星并合的首次关联，同时也产生了引力波（GW）。在此，我们提出 ZTF20abwysqy（AT2020scz）的发现，这是一个在 Fermi 卫星和行星际网络（IPN）对 GRB 200826A 的定位区域内的快速 fading 光学瞬变；X 射线和射电辐射进一步确认这是余辉。后续成像（静止系 16.5 天）揭示出余辉之上的超出辐射，无法用潜在的千新星（KN）解释，但与超新星（SN）一致。尽管 GRB 持续时间短（静止系 T90 为 0.65 s），我们的全色后续数据确认了坍缩星起源。GRB 200826A 是已发现具有关联坍缩星的最短 LGRB；它似乎处于成功与失败坍缩星的边缘。我们的发现与大多数坍缩星未能产生超相对论性喷流的假设一致。
关键词
引用
@article{arxiv.2105.05067,
title = {Discovery and confirmation of the shortest gamma ray burst from a collapsar},
author = {Tomas Ahumada and Leo P. Singer and Shreya Anand and Michael W. Coughlin and Mansi M. Kasliwal and Geoffrey Ryan and Igor Andreoni and S. Bradley Cenko and Christoffer Fremling and Harsh Kumar and Peter T. H. Pang and Eric Burns and Virginia Cunningham and Simone Dichiara and Tim Dietrich and Dmitry S. Svinkin and Mouza Almualla and Alberto J. Castro-Tirado and Kishalay De and Rachel Dunwoody and Pradip Gatkine and Erica Hammerstein and Shabnam Iyyani and Joseph Mangan and Dan Perley and Sonalika Purkayastha and Eric Bellm and Varun Bhalerao and Bryce Bolin and Mattia Bulla and Christopher Cannella and Poonam Chandra and Dmitry A. Duev and Dmitry Frederiks and Avishay Gal-Yam and Matthew Graham and Anna Y. Q. Ho and Kevin Hurley and Viraj Karambelkar and Erik C. Kool and S. R. Kulkarni and Ashish Mahabal and Frank Masci and Sheila McBreen and Shashi B. Pandey and Simeon Reusch and Anna Ridnaia and Philippe Rosnet and Benjamin Rusholme and Ana Sagues Carracedo and Roger Smith and Maayane Soumagnac and Robert Stein and Eleonora Troja and Anastasia Tsvetkova and Richard Walters and Azamat F. Valeev},
journal= {arXiv preprint arXiv:2105.05067},
year = {2022}
}
备注
submitted to Nature Astronomy