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Low-Gamma jets from Compact Binary Mergers as Candidate Electromagnetic Counterparts to Gravitational Wave Sources

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journal contribution
posted on 24.07.2019, 15:39 by Gavin P. Lamb, Shiho Kobayashi
Compact binary mergers, with neutron stars or neutron star and black-hole components, are thought to produce various electromagnetic counterparts: short gamma-ray bursts (GRBs) from ultra-relativistic jets followed by broadband afterglow; semi-isotropic kilonova from radioactive decay of r-process elements; and late time radio flares; etc. If the jets from such mergers follow a similar power-law distribution of Lorentz factors as other astrophysical jets then the population of merger jets will be dominated by low-Γ values. The prompt gamma-rays associated with short GRBs would be suppressed for a low-Γ jet and the jet energy will be released as X-ray/optical/radio transients when a shock forms in the ambient medium. Using Monte Carlo simulations, we study the properties of such transients as candidate electromagnetic counterparts to gravitational wave sources detectable by LIGO/Virgo. Approximately 78% of merger-jets result in failed GRB with optical peaks 14-22 magnitude and an all-sky rate of 2-3 per year.

Funding

This research was supported by STFC grants. GPL was supported by an IAU travel grant.

History

Citation

New Frontiers in Black Hole Astrophysics Proceedings IAU Symposium No. 324, 2016

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

AM (Accepted Manuscript)

Published in

New Frontiers in Black Hole Astrophysics Proceedings IAU Symposium No. 324

Publisher

Cambridge University Press (CUP) for International Astronomical Union (IAU)

issn

1743-9213

eissn

1743-9221

Copyright date

2017

Available date

24/07/2019

Publisher version

https://www.cambridge.org/core/journals/proceedings-of-the-international-astronomical-union/article/low-jets-from-compact-binary-mergers-as-candidate-electromagnetic-counterparts-to-gravitational-wave-sources/73C2D01B89B32E6AA43D23988D4C5F69

Editors

Gomboc, A

Language

en