External Inverse-Compton Emission Associated with Extended and Plateau Emission of Short Gamma-Ray Bursts: Application to GRB 160821B

被引：18
作者：
Zhang, B. Theodore [1 ,2 ,3 ]
Murase, Kohta [1 ,2 ,3 ,4 ]
Yuan, Chengchao [1 ,2 ,3 ]
Kimura, Shigeo S. [5 ,6 ]
Meszaros, Peter [1 ,2 ,3 ]
机构：
[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA
[2] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
[3] Penn State Univ, Inst Gravitat & Cosmos, Ctr Multimessenger Astrophys, University Pk, PA 16802 USA
[4] Kyoto Univ, Yukawa Inst Theoret Phys, Ctr Gravitat Phys, Kyoto, Kyoto 6068502, Japan
[5] Tohoku Univ, Frontier Res Inst Interdisciplinary Sci, Sendai, Miyagi 9808578, Japan
[6] Tohoku Univ, Astron Inst, Sendai, Miyagi 9808578, Japan
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2021年 / 908卷 / 02期
关键词：
Gamma-ray bursts; Gamma-ray sources; Gamma-ray astronomy; High energy astrophysics; Relativistic jets; Gravitational wave astronomy; Non-thermal radiation sources; MAGIC TELESCOPES; MAJOR UPGRADE; AFTERGLOW; COUNTERPARTS; COMPONENTS; ASTRONOMY; SPECTRA; MODELS; SHOCK;
D O I：
10.3847/2041-8213/abe0b0
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The recent detection of TeV photons from two gamma-ray bursts (GRBs), GRB 190114C and GRB 180720B, has opened a new window for multimessenger and multiwavelength astrophysics of high-energy transients. We study the origin of very high energy (VHE) gamma-rays from the short GRB 160821B, for which the MAGIC Collaboration reported a similar to 3 sigma statistical significance. Short GRBs are often accompanied by extended and plateau emission, which is attributed to internal dissipation resulting from activities of a long-lasting central engine, and Murase et al. (2018) recently suggested the external inverse-Compton (EIC) scenario for VHE counterparts of short GRBs and neutron star mergers. Applying this scenario to GRB 160821B, we show that the EIC flux can reach similar to 10(-12) erg cm(-2) s(-1) within a time period of similar to 10(3)-10(4) s, which is consistent with the MAGIC observations. EIC gamma-rays expected during the extended and plateau emission will be detectable with greater significance by future detectors such as the Cerenkov Telescope Array. The resulting light curve has a distinguishable feature, where the VHE emission is predicted to reach the peak around the end of the seed photon emission.
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页数：5
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