期刊
NATURE COMMUNICATIONS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms8323
关键词
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资金
- National Basic Research Programme of China [2013CB837000, 2014CB845800]
- NSFC [11361140349, 11103084, 11273063, 11303098, 11433009]
- Foundation for Distinguished Young Scholars of Jiangsu Province, China [BK2012047]
- Chinese Academy of Sciences via the 100 talent programme
- Strategic Priority Research Program [XDB09000000]
- Israel ISF-China BSF grant
- I-Core center for excellence 'Origins' of the ISF
- ASI [I/004/11/0]
Long-duration (> 2 s) gamma-ray bursts that are believed to originate from the death of massive stars are expected to be accompanied by supernovae. GRB 060614, that lasted 102 s, lacks a supernova-like emission down to very stringent limits and its physical origin is still debated. Here we report the discovery of near-infrared bump that is significantly above the regular decaying afterglow. This red bump is inconsistent with even the weakest known supernova. However, it can arise from a Li-Paczynski macronova-the radioactive decay of debris following a compact binary merger. If this interpretation is correct, GRB 060614 arose from a compact binary merger rather than from the death of a massive star and it was a site of a significant production of heavy r-process elements. The significant ejected mass favours a black hole-neutron star merger but a double neutron star merger cannot be ruled out.
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