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The environments and hosts of neutron star mergers and short GRBs

Published online by Cambridge University Press:  27 February 2023

Christina C. Thöne Open the ORCID record for Christina C. Thöne [Opens in a new window]
Christina C. Thöne*
Affiliation:
Astronomical Institute of the Czech Academy of Sciences, Fricova 298, Ondrejov 251 65, Czech Republic email: cthoene@asu.cas.cz
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Abstract

The hosts of binary neutron star (BNS) mergers and hence short GRBs are not only galaxies with old stellar populations, infact most short GRB hosts are at least mildly star-forming galaxies. According to theoretical studies of merger populations, both short and long merging time-scales are expected. The immediate environments of BNS mergers are not as directly related to the property of the progenitor system as for long GRBs, since the system usually travelled a significant distance from their birth place. However, studying the stellar population properties across the host can still give us vital information on the contribution of formation channels and on merger timescales. Here we review the properties of NS merger hosts in emission using integrated-light and resolved observations. The afterglows of short GRBs furthermore serve to study the interstellar medium in their host galaxies in absorption. We present our best example to date, GRB 160410A at z = 1.7, one of the highest redshift short GRBs.

Keywords

stars: neutrongamma rays: burstsgalaxies: ISMgalaxies: abundances
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. 43 - 50
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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