BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Evaluating magnetars as the progenitors of fast radio bursts
DTSTART;VALUE=DATE-TIME:20261028T173500Z
DTEND;VALUE=DATE-TIME:20261028T174500Z
DTSTAMP;VALUE=DATE-TIME:20261026T092612Z
UID:indico-contribution-3657@nyx.physics.mcgill.ca
DESCRIPTION:Speakers: Vishwangi Shah ()\nFast radio bursts (FRBs) are micr
 o-to-millisecond-duration radio transients originating from extragalactic 
 distances. While thousands of FRBs have been detected\, their origins rema
 in unknown. Many FRB theories invoke highly magnetised neutron stars\, cal
 led magnetars\, as FRB progenitors. In this talk\, I will evaluate the mag
 netar progenitor scenario using recent results from the CHIME/FRB telescop
 e.\nThe most energetic FRBs provide crucial insights into their emission m
 echanisms and progenitor models. I will present constraints on the maximum
  energy of FRBs derived from the largest sample of ~3\,000 one-off bursts 
 in the second CHIME/FRB catalog. Our results indicate that the isotropic e
 nergies of the most energetic FRBs are collectively limited to ~$10^{42}$ 
 erg\, thereby constraining the energy reservoir of their sources. Under st
 andard assumptions for the radiative efficiency factor between radio and h
 igh-energy emission\, this energy limit is consistent with the energies of
  the most powerful magnetar giant flares.\nFurthermore\, the occurrence of
  most FRB sources inside star-forming galaxies supports an origin in magne
 tars formed via core-collapse supernovae. However\, I will present the fir
 st ever localization of a repeating FRB far outside a quiescent galaxy\, w
 hich challenges this theory. We propose that this source resides in a glob
 ular cluster\, where the magnetar progenitor scenario is only viable if th
 e magnetar formed via exotic formation channels such as compact-object mer
 gers.\n\nhttps://nyx.physics.mcgill.ca/event/587/contributions/3657/
LOCATION:Online 
URL:https://nyx.physics.mcgill.ca/event/587/contributions/3657/
END:VEVENT
END:VCALENDAR