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On the gamma-ray burst – gravitational wave association in GW150914

Published online by Cambridge University Press:  23 June 2017

Agnieszka Janiuk ,
Szymon Charzynski  and
Michal Bejger
Agnieszka Janiuk
Affiliation:
Center for Theoretical Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland email: [email protected]
Szymon Charzynski
Affiliation:
Chair of Mathematical Methods in Physics, University of Warsaw ul. Pasteura 5, 02-093 Warszawa, Poland email: [email protected]
Michal Bejger
Affiliation:
Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, 00-716 Warsaw, Poland email: [email protected]
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Abstract

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Hyperaccreting disks around black holes are the engines that drive outflows and jets in gamma ray bursts (GRBs). The torus formed after the core collapse or a compact binary merger is composed of free nucleons, Helium, electron-positron pairs, and is cooled by neutrinos rather than photon emission. Hyperaccretion powers the ultra-relativistic jets, where the GRB prompt emission originates. The neutrons produced in the disk and also in the outflowing material are necessary for the production of heavier nuclei. We discuss here the observable consequences of nucleosynthesis and we also apply the scenario of hyperaccretion to the gravitational wave source, GW150914. Temporal coincidence reported by the Fermi satellite suggested that the black hole merger might be accompanied with a GRB. We propose that a collapsing massive star and a black hole in a close binary could lead to such event. Gravitational wave emission due to the merger of collapsed core and the companion black hole might then coincide with a weak GRB.

Keywords

Black hole physicsaccretion disksgamma ray burstsgravitational wavesneutrinos
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S324: New Frontiers in Black Hole Astrophysics , September 2016 , pp. 291 - 294
Copyright
Copyright © International Astronomical Union 2017 

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