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 - Funding Information:
Acknowledgements. We acknowledge support from a grant PRIN-INAF SKA-CTA 2016. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. We thank the staff of the GMRT that made these observations possible. GMRT is run by the National Centre for Radio Astrophysics of the Tata Institute of Fundamental Research. The European VLBI Network is a joint facility of independent European, African, Asian, and North American radio astronomy institutes. Scientific results from data presented in this publication are derived from the following EVN project code(s): RP032A. e-MERLIN is a National Facility operated by the University of Manchester at Jodrell Bank Observatory on behalf of STFC. We thank the Swift and Chandra staff for the support in carrying out the ToO observations. The Sardinia Radio Telescope (SRT) is funded by the Department of University and Research (MIUR), the Italian Space Agency (ASI), and the Autonomous Region of Sardinia (RAS) and is operated as National Facility by the National Institute for Astrophysics (INAF). We thank an anonymous referee for useful comments.
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.
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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 -