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arXiv 2202.04544astro-ph.HE
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来自婴儿宇宙的爆炸:非常高z的GRB 210905 A

A blast from the infant Universe: the very high-z GRB 210905A

A. Rossi, D. D. Frederiks, D. A. Kann, M. De Pasquale, E. Pian, G. Lamb, P. D'Avanzo, L. Izzo, A. J. Levan, D. B. Malesani, A. Melandri, A. Nicuesa Guelbenzu, S… 展开作者

A. Rossi, D. D. Frederiks, D. A. Kann, M. De Pasquale, E. Pian, G. Lamb, P. D'Avanzo, L. Izzo, A. J. Levan, D. B. Malesani, A. Melandri, A. Nicuesa Guelbenzu, S. Schulze, R. Strausbaugh, N. R. Tanvir, L. Amati, S. Campana, A. Cucchiara, G. Ghirlanda, M. Della Valle, S. Klose, R. Salvaterra, R. Starling, G. Stratta, A. E. Tsvetkova, S. D. Vergani, A. D'Ai, D. Burgarella, S. Covino, V. D'Elia, A. de Ugarte Postigo, H. Fausey, J. P. U. Fynbo, F. Frontera, C. Guidorzi, K. E. Heintz, N. Masetti, E. Maiorano, C. G. Mundell, S. R. Oates, M. J. Page, E. Palazzi, J. Palmerio, G. Pugliese, A. Rau, A. Saccardi, B. Sbarufatti, D. S. Svinkin, G. Tagliaferri, A. J. van der Horst, D. Watson, M. V. Ulanov, K. Wiersema, D. Xu, J. Zhang

摘要:

我们提出了一个详细的后续非常精力充沛的GRB 210905 A在一个高的红移z = 6.312和它的发光的X射线和光学余辉。我们获得了光度和光谱后续的光学和近红外(NIR),包括提示和余辉发射从几分钟到20毫秒后爆发。GRB 210905 A的各向同性伽马射线能量释放为Eiso = 1.27 E54 erg,在所有伽马射线暴(GRB)中,其释放的能量排在前7%。它的余辉是有史以来观测到的最明亮的。它开始于一个浅的演变,可以解释为能量注入,其次是一个陡峭的衰减,而光谱能量分布是在一个恒定密度的环境中的标准火球理论与缓慢冷却。在X射线光变曲线中观测到一个约46.2+-16.3 d(约6.3 d静止坐标系)的喷流中断;然而,由于可能的宿主星系的贡献,它被隐藏在H带中,这是迄今已知的z > 6的第四个GRB宿主星系。我们得出了8.4 ± 1.0度的半张角,这是有史以来z>6爆发的最高测量值,但在较近事件所覆盖的范围内。由此产生的1 E52 erg的准直校正伽马射线能量释放也是有史以来测量的最高能量之一。适度大的半开角反对最近声称的半开角对红移的反向依赖。总的喷流能量可能太大,标准的磁星无法维持,这表明这次爆发的中心引擎是一个新形成的黑洞。尽管出色的能量和亮度的GRB 210905 A和它的余辉,我们证明,他们是一致的,与那些不太遥远的爆发,表明供电机制和祖细胞不显着的红移演变。

英文摘要:

We present a detailed follow-up of the very energetic GRB 210905A at a high redshift of z = 6.312 and its luminous X-ray and optical afterglow. We obtained a photometric and spectroscopic follow-up in the optical and near-infrared (NIR), covering both the prompt and afterglow emission from a few minutes up to 20 Ms after burst. With an isotropic gamma-ray energy release of Eiso = 1.27E54 erg, GRB 210905A lies in the top ~7% of gamma-ray bursts (GRBs) in terms of energy released. Its afterglow is among the most luminous ever observed. It starts with a shallow evolution that can be explained by energy injection, and it is followed by a steeper decay, while the spectral energy distribution is in agreement with slow cooling in a constant-density environment within the standard fireball theory. A jet break at ~ 46.2+-16.3 d (~6.3 d rest-frame) has been observed in the X-ray light curve; however, it is hidden in the H band due to the contribution from the likely host galaxy, the fourth GRB host at z > 6 known to date. We derived a half-opening angle of 8.4+-1.0 degrees, which is the highest ever measured for a z>6 burst, but within the range covered by closer events. The resulting collimation-corrected gamma-ray energy release of 1E52 erg is also among the highest ever measured. The moderately large half-opening angle argues against recent claims of an inverse dependence of the half-opening angle on the redshift. The total jet energy is likely too large to be sustained by a standard magnetar, and it suggests that the central engine of this burst was a newly formed black hole. Despite the outstanding energetics and luminosity of both GRB 210905A and its afterglow, we demonstrate that they are consistent with those of less distant bursts, indicating that the powering mechanisms and progenitors do not evolve significantly with redshift.

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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