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Radio observations of stripped-envelope core-collapse supernovae and long GRBs in the era of multi-messenger time-domain astronomy

Presentation #402.03 in the session Multi-messenger Stripped Envelope Supernovae.

Published onJul 01, 2023
Radio observations of stripped-envelope core-collapse supernovae and long GRBs in the era of multi-messenger time-domain astronomy

Over the next few years, multi-messenger studies carried out with ground-based gravitational wave (GW) detectors will improve our understanding of mergers of neutron star (NS)-NS and black holes (BH)-NS systems. However, these studies will also impact our understanding of core collapses. While the GW siren of GW170817 has directly confirmed that at least some short gamma-ray bursts (GRBs) originate from NS-NS mergers, the smoking gun linking long GRBs to core-collapses i.e., the presence of a stripped-envelope core-collapse supernova with broad lines (Ic-BL SN), has been challenged by several electromagnetic (EM) observations. Some long GRBs have been observed to lack SN emission down to limits hundreds of times fainter than the archetypal SN 1998bw that accompanied the long GRB 980425, some apparently long GRBs have been linked to NS-NS mergers, and some apparently short GRBs to collapsars. Understanding the link between GRBs and SNe depends strongly on our ability to reduce the large uncertainties in SN explosion physics that prevent models from having a definite predictive power regarding the presence or absence of observable SNe in collapsars. In this context, I will review how radio observations can improve our understanding of the diverse paths that bring massive stars to their deaths. I will also highlight prospects for directly observing the most extreme core-collapses in both radio and GWs using ground-based detectors of the next generation. Finally, I will comment on the potential of core-collapse SNe as EM precursors of multi-band GW sources observable with LISA and ground-based GW detectors.

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