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HEP Seminar: The origin of r-process elements and electromagnetic counterparts to gravitational waves

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Kenta Hotokezaka, Hebrew University of Jerusalem
When
01 February 2017 from 2:30 PM to 3:30 PM
Where
339 Davey Laboratory
Contact Name
Kohta Murase
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The site of the heavy r-process nucleosynthesis is one of the current astronomical puzzles. For a long time it was believed that those are formed in supernovae. Compact binary mergers are the other alternative. In the recent years, the evidence suggesting that compact binary mergers are the site of these elements has been accumulating. I will summarize the evidence from the astrophysical and geological observations including galactic metal poor stars, dwarf galaxies, macronovae, radioactive elements in meteorites and the Earth's deep sea floor. I will also talk about electromagnetic counterparts of LIGO's gravitational-wave merger events. In particular, I  focus on macronovae powered by the radioactivity of r-process elements in neutron star merger ejecta. I will discuss the basic physics and characteristics of macronovae and their detectablility by follow-up observations of upcoming LIGO's events.
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