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Compact object coalescences and gamma-ray bursts in the gravitational-wave era

Abstract : The era of multi-messenger astronomy with gravitational waves started with the coalescence of a neutron star binary named GW170817. This signal was followed by a rich set of electromagnetic counterparts: a weak short gamma-ray burst, a kilonova thermal transient signal, a long-lived afterglow. This multi-messenger dataset allowed major advances in astrophysics, and the era of gravitational waves is full of promise with the next gravitational-wave observing campaigns and a more efficient and better organized electromagnetic follow-up. The analysis of this event allowed the first fine study of the structure of relativistic jets which are launched by the coalescence of compact objects and in which some gamma-ray bursts are produced. This PhD thesis presents work begun shortly after GW170817 that explores three avenues of research motivated by the onset of the multi-messenger era: (i) population prospects for the electromagnetic counterparts of gravitational-wave signals from compact object coalescences; (ii) prospects for exploiting these events to measure the Hubble constant and to study the environments of compact object coalescences; and (iii) exploration of the possible consequences of jet structure on gamma-ray burst afterglows.
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Submitted on : Friday, December 10, 2021 - 10:08:07 AM
Last modification on : Saturday, July 23, 2022 - 3:23:14 AM
Long-term archiving on: : Friday, March 11, 2022 - 6:36:22 PM


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  • HAL Id : tel-03474195, version 1


Raphaël Duque. Compact object coalescences and gamma-ray bursts in the gravitational-wave era. Astrophysics [astro-ph]. Sorbonne Université, 2021. English. ⟨NNT : 2021SORUS153⟩. ⟨tel-03474195⟩



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