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Lamb, GP and Kobayashi, S (2018) GRB 170817A as a jet counterpart to gravitational wave trigger GW 170817. Monthly Notices of the Royal Astronomical Society, 487 (1). pp. 733-740. ISSN 0035-8711
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GRB 170817A as a jet counterpart to gravitational wave trigger GW 170817.pdf - Published Version Download (788kB) | Preview |
Abstract
Fermi/GBM (Gamma-ray Burst Monitor) and INTEGRAL (the International Gamma-ray Astrophysics Laboratory) reported the detection of the γ-ray counterpart, GRB 170817A, to the LIGO (Light Interferometer Gravitational-wave Observatory)/Virgo gravitational wave detected binary neutron star merger, GW 170817. GRB 170817A is likely to have an internal jet or another origin such as cocoon emission, shock-breakout, or a flare from a viscous disc. In this paper we assume that the γ-ray emission is caused by energy dissipation within a relativistic jet and we model the afterglow synchrotron emission from a reverse and forward shock in the outflow. We show the afterglow for a low-luminosity γ-ray burst (GRB) jet with a high Lorentz factor (Γ); a low-Γ and low-kinetic-energy jet; a low-Γ, high-kinetic-energy jet; structured jets viewed at an inclination within the jet-half-opening angle; and an off-axis ‘typical’ GRB jet. All jet models will produce observable afterglows on various time-scales. The late-time afterglow from 10 to 110 d can be fitted by a Gaussian structured jet viewed at a moderate inclination, however the GRB is not directly reproduced by this model. These jet afterglow models can be used for future gravitational wave detected neutron star merger counterparts with a jet afterglow origin.
| Item Type: | Article |
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| Additional Information: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2018 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
| Uncontrolled Keywords: | astro-ph.HE; astro-ph.HE; gr-qc |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Divisions: | Astrophysics Research Institute |
| Publisher: | Oxford University Press |
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| Date Deposited: | 22 May 2018 08:46 |
| Last Modified: | 04 Sep 2021 10:29 |
| DOI or ID number: | 10.1093/mnras/sty1108 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/8687 |
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