论文标题
从快速冷却同步加速器发射中，以长达一分钟的合并驱动的伽马射线爆发的案例
The case for a minute-long merger-driven gamma-ray burst from fast-cooling synchrotron emission
论文作者
论文摘要
几十年来，伽马射线爆发（GRB）已被广泛分为“长” - 和“短”式爆发，分别持续或持续超过2s。但是，该二分法并未完美地映射到已知产生GRB的两个祖细胞通道 - 紧凑物体（合并GRB）的合并或大量恒星（Collapsar-Grbs）的崩溃。特别是，合并GRB的人口还可能包括短而硬的$ \ Lessim $ 2S尖峰以及随后更长的延长，更柔和的延长排放（EE）。在50年代持续的GRB 211211A中，最近发现的Kilonova（中子星合并中产生的重型元素的放射性发光）进一步表明，合并可以驱动模仿折叠式种群的长期复杂的GRB。在这里，我们提供了GRB 211211a高能发射的详细时间和光谱分析。我们证明发射具有纯粹的同步子来源，峰值和冷却频率都通过$γ$ ray频带向下移动到X射线，并且迅速发展的光谱在后期驱动EE签名。合并 - GRB中这种光谱演化的鉴定为祖细胞类型的诊断开辟了途径。
For decades, gamma-ray bursts (GRBs) have been broadly divided into `long'- and `short'-duration bursts, lasting more or less than 2s, respectively. However, this dichotomy does not map perfectly to the two progenitor channels that are known to produce GRBs -- the merger of compact objects (merger-GRBs) or the collapse of massive stars (collapsar-GRBs). In particular, the merger-GRBs population may also include bursts with a short, hard $\lesssim$2s spike and subsequent longer, softer extended emission (EE). The recent discovery of a kilonova -- the radioactive glow of heavy elements made in neutron star mergers -- in the 50s-duration GRB 211211A further demonstrates that mergers can drive long, complex GRBs that mimic the collapsar population. Here we present a detailed temporal and spectral analysis of the high-energy emission of GRB 211211A. We demonstrate that the emission has a purely synchrotron origin, with both the peak and cooling frequencies moving through the $γ$-ray band down to the X-rays, and that the rapidly-evolving spectrum drives the EE signature at late times. The identification of such spectral evolution in a merger-GRB opens avenues for diagnostics of the progenitor type.
