DOI

https://doi.org/10.48717/fr3b-xk48

Project

RP032

Title

e-EVN: EG116A, RP032A

Abstract

Fast Radio Bursts (FRBs) are one of the greatest mysteries of modern astronomy. Only an handful of them have been localized in galaxies, and detection at wavelengths other than radio have eluded observations so far. FRBs show an impulsive behaviour, characterised by a ∼ ms-long, very energetic, burst. A growing subset of the population is now characterised by repeating bursts, this behaviour was critical to identify the host and to constrain their properties and shaped models for their origin. VLBI observations have allowed to locate at milli-arcsecond scale a persistent radio counterpart to the FRB 121102, the first repeater ever identified, co-located with a low-luminosity AGN or an unknown type of extra-galactic source. Here we propose to observe a repeating FRB 20201124A that is still very active, found at a closer distance with respect to FRB 121102, and for which a JVLA detection of a persistent radio source (the second known so far) has been obtained by our team. Multi-epoch EVN observations at 5 GHz will allow us to localise the radio persistent source and characterize its radio morphology at milli-arcsecond resolution to eventually associate the FRB with a secure radio counterpart.