【学术报告】
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报告题目： The gravitational event, the short GRB and the kilonova of 17 August 2017: a multi-messenger revolution
报告人： Prof. Elena Pian
报告人单位： Italian National Institute for Astrophysics (INAF), Astrophysics and Space Science Observatory
报告时间： 2019年12月13日（星期五）下午2:30-3:30
报告地点： 主楼二楼228会议室
报告语言： 英文
报告摘要：
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On 17 August 2017, less than two years after the direct detection of gravitational radiation from the merger of two ~30 Msun black holes, a binary neutron star merger was identified as the source of a gravitational wave signal of ~100 s duration occurred at an estimated ~50 Mpc from Earth. A short GRB was independently identified in the same sky area by the Fermi and INTEGRAL satellites, which turned out to be associated with the gravitational event. Prompt follow-up observations at all wavelengths led first to the detection of an optical/infrared thermal source located in the spheroidal galaxy NGC2997 (40 Mpc) and, with a delay of ~10 days, to the detection of radio and X-ray signals. I will review these observations and describe in particular the thermal source, due to the radioactive decay of the isotopes of elements that had formed via rapid neutron capture during the merger and in the phases immediately following it. I will also expand on the far-reaching consequences that this detection bears on the history of heavy element cosmic enrichment.
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12月7日
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