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arXiv · 1310.1623

Progenitor models of the electromagnetic transient associated with the short GRB 130603B

Kenta Hotokezaka·Koutarou Kyutoku·Masaomi Tanaka·Kenta Kiuchi·Yuichiro Sekiguchi·Masaru Shibata·Shinya Wanajo
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Abstract

An electromagnetic transient powered by the radioactive decay of r-process elements, a so-called kilonova/macronova, is one of the possible observable consequences of compact binary mergers including at east one neutron star. Recent observations strongly suggest the first discovery of the electromagnetic transient, which is associated with the short GRB 130603B. We explore a possible progenitor of this event combining the numerical-relativity simulations and radiative transfer simulations of the dynamical ejecta of binary neutron star and black hole - neutron star mergers. We show that the ejecta models within a realistic parameter range consistently reproduce the observed near-infrared excess. We also show that the soft equation of state models for binary neutron star mergers and the stiff equation of state models for black hole - neutron star mergers are favored to reproduce the observed luminosity.

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Kenta Hotokezaka, Koutarou Kyutoku, Masaomi Tanaka, Kenta Kiuchi, Yuichiro Sekiguchi, Masaru Shibata, Shinya Wanajo. 2013-10-06. Progenitor models of the electromagnetic transient associated with the short GRB 130603B. https://doi.org/10.1088/2041-8205/778/1/l16

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