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Radio afterglows of Very High Energy Gamma-ray Bursts

Published online by Cambridge University Press:  27 February 2023

Lauren Rhodes Open the ORCID record for Lauren Rhodes [Opens in a new window] ,
Alexander van der Horst  and
Rob Fender
Lauren Rhodes
Affiliation:
Astrophysics, Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, UK. email: [email protected] Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
Alexander van der Horst
Affiliation:
Department of Physics, the George Washington University, 725 21st Street NW, Washington, DC 20052, USA Astronomy, Physics and Statistics Institute of Sciences (APSIS), 725 21st Street NW, Washington, DC 20052, USA
Rob Fender
Affiliation:
Astrophysics, Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH, UK. email: [email protected] Department of Astronomy, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
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Abstract

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Five long gamma-ray bursts (GRBs) have been found to have very high energy (VHE, > 100GeV) counterparts. Interestingly, more than one emission mechanism has been invoked to explain the VHE counterpart from different events. As a result of this discovery, it has become apparent that we have been missing half of the energy produced in the afterglow of GRBs. We have been studying the radio afterglows in order to investigate whether these VHE GRBs have unusual jet properties. Studying these events in the radio waveband is advantageous as the emission at lower frequencies is brighter for longer enabling detailed, long term study of the jet evolution. The jet properties and environments of these GRBs vary hugely in a similar manner to that seen in the ‘regular’ long GRB population with evidence of bright reverse shock emission and multiple jet components. This work is presented on behalf of a much larger collaboration.

Keywords

gamma rays: burstsradio continuum: generalISM: jets and outflows
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S363: Neutron Star Astrophysics at the Crossroads: Magnetars and the Multimessenger Revolution , June 2020 , pp. 220 - 223
Creative Commons
Creative Common License - CCCreative Common License - BY
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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