The fast radio burst FRB 20201124A in a star-forming region: Constraints to the progenitor and multiwavelength counterparts
Journal
Date Issued
2021
Author(s)
•
•
Troja, E.
•
O’Connor, B.
•
•
•
Zhang, B.
•
•
Dichiara, S.
•
Lee, K. J.
•
•
Niu, J. R.
•
•
•
•
Xu, H.
•
Zhu, W. W.
•
Kutyrev, A. S.
•
Veilleux, S.
Abstract
We present the results of a multiwavelength campaign targeting FRB 20201124A, the third closest repeating fast radio burst (FRB), which was recently localized in a nearby (z = 0.0978) galaxy. Deep VLA observations led to the detection of quiescent radio emission, which was also marginally visible in X-rays with Chandra. Imaging at 22 GHz allowed us to resolve the source on a scale of ? 1″ and locate it at the position of the FRB, within an error of 0.2″. The EVN and e-MERLIN observations sampled small angular scales, from 2 to 100 mas, providing tight upper limits on the presence of a compact source and evidence for diffuse radio emission. We argue that this emission is associated with enhanced star formation activity in the proximity of the FRB, corresponding to a star formation rate (SFR) of ≈10 M? yr-1. The surface SFR at the location of FRB 20201124A is two orders of magnitude larger than what is typically observed in other precisely localized FRBs. Such a high SFR is indicative of this FRB source being a newborn magnetar produced from a supernova explosion of a massive star progenitor. Upper limits to the X-ray counterparts of 49 radio bursts observed in our simultaneous FAST, SRT, and Chandra campaign are consistent with a magnetar scenario.
Volume
656
Issn Identifier
0004-6361
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
2107.14339.pdf
Description
postprint
Size
3.3 MB
Format
Adobe PDF
Checksum (MD5)
bdfaffdb8279d8c9ce0c24deefa8a5e5
Loading...
Name
aa41903-21.pdf
Description
Pdf editoriale
Size
3.3 MB
Format
Adobe PDF
Checksum (MD5)
89e4869f49b5369b88b1c9d2aa058952