TY - JOUR
T1 - The fast radio burst FRB 20201124A in a star-forming region
T2 - Constraints to the progenitor and multiwavelength counterparts
AU - Piro, L.
AU - Bruni, G.
AU - Troja, E.
AU - O'connor, B.
AU - Panessa, F.
AU - Ricci, R.
AU - Zhang, B.
AU - Burgay, M.
AU - Dichiara, S.
AU - Lee, K. J.
AU - Lotti, S.
AU - Niu, J. R.
AU - Pilia, M.
AU - Possenti, A.
AU - Trudu, M.
AU - Xu, H.
AU - Zhu, W. W.
AU - Kutyrev, A. S.
AU - Veilleux, S.
N1 - Publisher Copyright:
© ESO 2021.
PY - 2021/12/1
Y1 - 2021/12/1
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/85121206181
UR - https://www.scopus.com/pages/publications/85121206181#tab=citedBy
U2 - 10.1051/0004-6361/202141903
DO - 10.1051/0004-6361/202141903
M3 - Article
AN - SCOPUS:85121206181
SN - 0004-6361
VL - 656
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - L15
ER -