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题名: The Macronova in GRB 050709 and the GRB-macronova connection
作者: Jin, Zhi-Ping; Hotokezaka, Kenta; Li, Xiang; Tanaka, Masaomi; D'Avanzo, Paolo; Fan, Yi-Zhong; Covino, Stefano; Wei, Da-Ming; Piran, Tsvi
刊名: NATURE COMMUNICATIONS
出版日期: 2016
卷号: 7, 期号:0, 页码:12898
英文摘要: GRB 050709 was the first short Gamma-ray Burst (sGRB) with an identified optical counterpart. Here we report a reanalysis of the publicly available data of this event and the discovery of a Li-Paczynski macronova/kilonova that dominates the optical/infrared signal at t > 2.5 days. Such a signal would arise from 0.05 M-circle dot r-process material launched by a compact binary merger. The implied mass ejection supports the suggestion that compact binary mergers are significant and possibly main sites of heavy r-process nucleosynthesis. Furthermore, we have reanalysed all afterglow data from nearby short and hybrid GRBs (shGRBs). A statistical study of shGRB/macronova connection reveals that macronova may have taken place in all these GRBs, although the fraction as low as 0.18 cannot be ruled out. The identification of two of the three macronova candidates in the I-band implies a more promising detection prospect for ground-based surveys.
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16893
Appears in Collections:紫金山天文台青海观测站_期刊论文

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