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Article Dans Une Revue The Astrophysical Journal Année : 2023

Subarcminute Localization of 13 Repeating Fast Radio Bursts Detected by CHIME/FRB

Mohit Bhardwaj
Charanjot Brar
B. Gaensler
Victoria Kaspi
Aida Kirichenko
Kiyoshi Masui
Ryan Mckinven
Cherry Ng
Chitrang Patel
Ketan Sand
Paul Scholz
Kaitlyn Shin
Seth Siegel
Ingrid Stairs
Tomas Cassanelli
Amanda Cook
Matt Dobbs
Fengqiu Adam Dong
Emmanuel Fonseca
Adaeze Ibik
Jane Kaczmarek
Calvin Leung
Aaron Pearlman
Emily Petroff
Ziggy Pleunis
Masoud Rafiei-Ravandi
Pranav Sanghavi
J. Richard Shaw
Shriharsh Tendulkar

Résumé

Abstract We report on improved sky localizations of 13 repeating fast radio bursts (FRBs) discovered by CHIME/FRB via the use of interferometric techniques on channelized voltages from the telescope. These so-called “baseband localizations” improve the localization uncertainty area presented in past studies by more than three orders of magnitude. The improved localization regions are provided for the full sample of FRBs to enable follow-up studies. The localization uncertainties, together with the limits on the source distances from their dispersion measures, allow us to identify likely host galaxies for two of the FRB sources. FRB 20180814A lives in a massive passive red spiral at z ∼ 0.068 with very little indication of star formation, while FRB 20190303A resides in a merging pair of spiral galaxies at z ∼ 0.064 undergoing significant star formation. These galaxies show very different characteristics, further confirming the presence of FRB progenitors in a variety of environments even among the repeating subclass.
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hal-04442946 , version 1 (06-02-2024)

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Daniele Michilli, Mohit Bhardwaj, Charanjot Brar, B. Gaensler, Victoria Kaspi, et al.. Subarcminute Localization of 13 Repeating Fast Radio Bursts Detected by CHIME/FRB. The Astrophysical Journal, 2023, 950 (2), pp.134. ⟨10.3847/1538-4357/accf89⟩. ⟨hal-04442946⟩
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