ICTS:32989

Persistent Radio Sources with Fast Radio Bursts: Constraints on Progenitor Magnetars

(2025). Persistent Radio Sources with Fast Radio Bursts: Constraints on Progenitor Magnetars. SciVideos. https://scivideos.org/index.php/icts-tifr/32989

Persistent Radio Sources with Fast Radio Bursts: Constraints on Progenitor Magnetars. SciVideos, Oct. 16, 2025, https://scivideos.org/index.php/icts-tifr/32989 

          @misc{ scivideos_ICTS:32989,
            doi = {},
            url = {https://scivideos.org/index.php/icts-tifr/32989},
            author = {},
            keywords = {},
            language = {en},
            title = {Persistent Radio Sources with Fast Radio Bursts: Constraints on Progenitor Magnetars},
            publisher = {},
            year = {2025},
            month = {oct},
            note = {ICTS:32989 see, \url{https://scivideos.org/index.php/icts-tifr/32989}}
          }
Minhajur Rahaman
Talk numberICTS:32989
Source RepositoryICTS-TIFR

Abstract

The association of quasi-steady persistent radio sources (PRSs) with a few repeating fast radio bursts (FRBs) offers a valuable testbed for examining the magnetar progenitor hypothesis. A widely favored interpretation attributes the PRS emission to synchrotron radiation from highly charged electron-positron pairs in a magnetar wind nebula. Observational probes—including radio imaging, scintillation studies, and equipartition analysis—consistently point to a very compact source size. This compactness strongly disfavors scenarios involving rapid expansion, such as those expected from millisecond magnetars formed in superluminous or ultra-stripped supernovae. In this talk, I will show that the observed PRS properties are naturally explained by a magnetar wind nebula powered by the decay of the internal magnetic field of a magnetar formed in a sub-energetic supernova, with an initial spin period of a few tens of milliseconds. This scenario also leads to clear observational predictions at both ends of the PRS spectrum: a synchrotron self-absorption break near 200 MHz and a cooling break around 150 GHz—features that can be tested with current radio telescopes.