期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 828, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/2041-8205/828/1/L4
关键词
gamma rays: general; gravitational waves
资金
- National Basic Research Program (973 Program) of China [2014CB845800]
- National Natural Science Foundation of China [11273016]
- Basic Research Program of Jiangsu Province [BK2012011]
Recently, the Advanced Laser Interferometer Gravitational-wave Observatory detected gravitational-wave (GW) transients from mergers of binary black holes (BHs). The system may also produce a wide-angle, relativistic outflow if the claimed short gamma-ray burst detected by GBM is in real association with GW150914. It was suggested that mergers of double neutron stars (or neutron star-black hole binaries), another promising source of GW transients, also produce fast, wide-angle outflows. In this paper, we calculate the high-energy gamma-ray emission arising from the blast waves driven by these wide-angle outflows. We find that TeV emission arising from the inverse-Compton process in the relativistic outflow, originating from mergers of binary BHs that are similar to those in GW150914, could be detectable by ground-based Imaging Atmospheric Cherenkov Telescopes such as the Cherenkov Telescope Array (CTA) if the sources occur in a dense medium with a density of n greater than or similar to 0.3 cm(-3). For neutron star-neutron star (NS-NS) and NS-BH mergers, TeV emission from the wide-angle, mildly relativistic outflow could be detected as well, if it occurs in a dense medium with n. 10-100 cm(-3). Thus, TeV afterglow emission could be a useful probe of the environment of the GW transients, which could shed light on the evolution channels of the progenitors of GW transients.
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