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题名: An r-process macronova/kilonova in GRB 060614: evidence for the merger of a neutron star-black hole binary
作者: Jin, Zhi-Ping; Fan, Yi-Zhong; Wei, Da-Ming
刊名: 13TH INTERNATIONAL SYMPOSIUM ON ORIGIN OF MATTER AND EVOLUTION OF GALAXIES (OMEG2015)
出版日期: 2016
卷号: 109, 期号:0, 页码:8002
DOI: 10.1051/epjconf/201610908002
英文摘要: After the jet break at t similar to 1.4 days, the optical afterglow emission of the longshort burst GRB 060614 can be divided into two components. One is the power-law decaying forward shock afterglow emission. The other is an excess of flux in several multi-band photometric observations, which emerges at similar to 4 days after the burst, significantly earlier than that observed for a supernova associated with a long-duration GRB. At t > 13.6 days, the F814W-band flux drops faster than t(-3.2). Moreover, the spectrum of the excess component is very soft and the luminosity is extremely low. These observed signals are incompatible with those from weak supernovae, but the ejection of similar to 0.1 M-circle dot of r-process material from a black hole-neutron star merger, as recently found in some numerical simulations, can produce it. If this interpretation is correct, it represents the first time that a multi-epoch/ band lightcurve of a Li-Paczynski macronova (also known as kilonova) has been obtained and black hole-neutron star mergers are sites of significant production of r-process elements.
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内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16889
Appears in Collections:紫金山天文台青海观测站_期刊论文

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