arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1401.7283astro-ph.HE
收藏

GRB 131231 A:GeV排放的影响

GRB 131231A: Implications of the GeV emission

Bin Liu, Wei Chen, Yun-Feng Liang, Bei Zhou, Hao-Ning He, Pak-Hin Thomas Tam, Lang Shao, Zhi-Ping Jin, Yi-Zhong Fan, Da-Ming Wei

摘要:

GRB 131231A是由费米空间伽马射线望远镜上的大面积望远镜探测到的。高能伽马射线($> 100$ MeV)余辉发射光谱在触发之后的第一$\sim 1300$ s中是$F_ν\propto ν^{-0.54\pm0.15}$,并且最高能量的光子具有到达$t\sim 520$ s的能量$\sim 62$ GeV。在合理的伽玛暴外流参数和环爆介质密度的情况下,电子或质子在外部前向冲击波下加速的同步辐射很难解释这些数据。相反,前向冲击加速电子的同步自康普顿辐射可以解释GeV余辉发射的光谱和时间行为。我们还表明,用切伦科夫望远镜阵列(CTA)探测GRB 131231 A $-$类GRB的前景是有希望的。

英文摘要:

GRB 131231A was detected by the Large Area Telescope onboard Fermi Space Gamma-ray Telescope. The high energy gamma-ray ($> 100$ MeV) afterglow emission spectrum is $F_ν\propto ν^{-0.54\pm0.15}$ in the first $\sim 1300$ s after the trigger and the most energetic photon has an energy $\sim 62$ GeV arriving at $t\sim 520$ s. With reasonable parameters of the GRB outflow as well as the density of the circum-burst medium, the synchrotron radiation of electrons or protons accelerated at an external forward shock have difficulty accounting for the data. The synchrotron self-Compton radiation of the forward shock-accelerated electrons, instead, can account for both the spectrum and temporal behavior of the GeV afterglow emission. We also show that the prospect for detecting GRB 131231A$-$like GRBs with Cherenkov Telescope Array (CTA) is promising.

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。

↑