VLBA22B-074

Probing the local environment of FRB 20190714A

Abstract

Over the last several years, new instrumentation on interferometers such as the VLA and ASKAP has enabled (sub-)arcsecond localisations of Fast Radio Bursts (FRBs) upon discovery. This sample of well-localised FRBs is crucial for progenitor identifications and constraints, as it allows follow-up observations at other wavelengths. While no contemporaneous, transient multi-wavelength counterparts to FRBs have been identified yet, a couple of well-localised, prolific repeating FRBs have been associated with milliarcsecond-scale continuum radio sources ("persistent sources"). Magnetar-based models for FRB progenitors can account for co-located persistent radio emission, but generally expect a correlation between the persistent source properties and FRB source age, which itself is often assumed to correlate with repetition properties. We have recently identified persistent radio emission, sub-arcsecond in size, whose position is consistent with that of the (so-far) non-repeating FRB 20190714A. We propose to observe this persistent source with the HSA to confirm the association, and study the compactness and nature of this source. If confirmed as a milli-arcsecond scale persistent source associated with the FRB, this first detection from a non-repeating FRB will have profound implications for FRB progenitor models.

Investigators

Name	Institution
Casey Law	California Institute of Technology
Manisha Caleb *	Australian National University; Sydney, University of
Adam Deller	Swinburne University of Technology
Ben Stappers	Manchester, University of
James Chibueze	Kagoshima University; Square Kilometre Array
Ryan Shannon	Swinburne University of Technology
Keith Bannister	Australia Telescope National Facility
Rene Breton	Toronto, University of; Southampton, University of
Elizabeth Mahony	Netherlands Institute for Radio Astronomy; Sydney, University of; Commonwealth Scientific and Industrial Research Organisation
GBT Operator	Green Bank Observatory

* indicates the PI