Deep Synoptic Array Science: Discovery of the Host Galaxy of FRB 20220912A

We report the detection and interferometric localization of the repeating fast radio burst (FRB) source FRB 20220912A during commissioning observations with the Deep Synoptic Array (DSA-110). Two bursts were detected from FRB 20220912A, one each on 2022 October 18 and 2022 October 25. The best-fit p...

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Veröffentlicht in:Astrophysical journal. Letters 2023-05, Vol.949 (1), p.L3
Hauptverfasser: Ravi, Vikram, Catha, Morgan, Chen, Ge, Connor, Liam, Faber, Jakob T., Lamb, James W., Hallinan, Gregg, Harnach, Charlie, Hellbourg, Greg, Hobbs, Rick, Hodge, David, Hodges, Mark, Law, Casey, Rasmussen, Paul, Sharma, Kritti, Sherman, Myles B., Shi, Jun, Simard, Dana, Squillace, Reynier, Weinreb, Sander, Woody, David P., Yadlapalli, Nitika, Ahumada, Tomas, Dong, Dillon, Fremling, Christoffer, Huang, Yuping, Karambelkar, Viraj, Miller, Jessie M.
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container_issue 1
container_start_page L3
container_title Astrophysical journal. Letters
container_volume 949
creator Ravi, Vikram
Catha, Morgan
Chen, Ge
Connor, Liam
Faber, Jakob T.
Lamb, James W.
Hallinan, Gregg
Harnach, Charlie
Hellbourg, Greg
Hobbs, Rick
Hodge, David
Hodges, Mark
Law, Casey
Rasmussen, Paul
Sharma, Kritti
Sherman, Myles B.
Shi, Jun
Simard, Dana
Squillace, Reynier
Weinreb, Sander
Woody, David P.
Yadlapalli, Nitika
Ahumada, Tomas
Dong, Dillon
Fremling, Christoffer
Huang, Yuping
Karambelkar, Viraj
Miller, Jessie M.
description We report the detection and interferometric localization of the repeating fast radio burst (FRB) source FRB 20220912A during commissioning observations with the Deep Synoptic Array (DSA-110). Two bursts were detected from FRB 20220912A, one each on 2022 October 18 and 2022 October 25. The best-fit position is (R.A. J2000, decl. J2000) = (23:09:04.9, +48:42:25.4), with a 90% confidence error ellipse with radii ±2″ and ±1″ in R.A. and decl., respectively. The two bursts are polarized, and we find a Faraday rotation measure that is consistent with the low value of +0.6 rad m −2 reported by CHIME/FRB. The DSA-110 localization overlaps with the galaxy PSO J347.2702+48.7066 at a redshift z = 0.0771, which we identify as the likely host. PSO J347.2702+48.7066 has a stellar mass of approximately 10 10 M ⊙ , modest internal dust extinction, and a star formation rate likely in excess of 0.1 M ⊙ yr −1 . The host-galaxy contribution to the dispersion measure is likely ≲50 pc cm −3 . The FRB 20220912A source is therefore likely viewed along a tenuous plasma column through the host galaxy.
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subjects Arrays
Compact objects
Faraday effect
Galaxies
Localization
Radio bursts
Radio interferometry
Radio telescopes
Radio transient sources
Red shift
Star & galaxy formation
Star formation
Star formation rate
Stellar mass
title Deep Synoptic Array Science: Discovery of the Host Galaxy of FRB 20220912A
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