Language selection

Government of Canada / Gouvernement du Canada

Search

CHIME/FRB discovery of 25 repeating fast radio burst sources

From National Research Council Canada

Download
  1. (PDF, 6.1 MiB)
DOIResolve DOI: https://doi.org/10.3847/1538-4357/acc6c1
AuthorSearch for: ORCID identifier: https://orcid.org/0000-0001-5908-3152; Search for: ORCID identifier: https://orcid.org/0000-0003-3772-2798; Search for: ORCID identifier: https://orcid.org/0000-0002-3615-3514; Search for: ORCID identifier: https://orcid.org/0000-0001-8537-9299; Search for: ORCID identifier: https://orcid.org/0000-0002-1800-8233; Search for: ORCID identifier: https://orcid.org/0000-0003-2047-5276; Search for: ORCID identifier: https://orcid.org/0000-0002-2878-1502; Search for: ORCID identifier: https://orcid.org/0000-0002-3426-7606; Search for: ORCID identifier: https://orcid.org/0000-0001-6422-8125; Search for: ORCID identifier: https://orcid.org/0000-0002-8376-1563; Search for: ORCID identifier: https://orcid.org/0000-0001-7166-6422; Search for: ORCID identifier: https://orcid.org/0000-0003-4098-5222; Search for: ORCID identifier: https://orcid.org/0000-0001-9855-5781; Search for: ORCID identifier: https://orcid.org/0000-0002-6899-1176; Search for: ORCID identifier: https://orcid.org/0000-0001-8384-5049; Search for: ORCID identifier: https://orcid.org/0000-0002-3382-9558; Search for: ORCID identifier: https://orcid.org/0000-0001-5553-9167; Search for: ORCID identifier: https://orcid.org/0000-0002-3654-4662; Search for: ORCID identifier: https://orcid.org/0000-0001-7301-5666; Search for: ORCID identifier: https://orcid.org/0000-0003-2405-2967; Search for: ORCID identifier: https://orcid.org/0000-0003-3059-6223; Search for: 1ORCID identifier: https://orcid.org/0000-0003-4810-7803; Search for: ORCID identifier: https://orcid.org/0000-0003-2739-5869; Search for: ORCID identifier: https://orcid.org/0000-0001-9345-0307; Search for: 1ORCID identifier: https://orcid.org/0000-0003-1455-2546; Search for: ORCID identifier: https://orcid.org/0000-0003-2116-3573; Search for: ORCID identifier: https://orcid.org/0000-0002-5857-4264; Search for: ORCID identifier: https://orcid.org/0000-0002-4209-7408; Search for: ORCID identifier: https://orcid.org/0000-0001-7453-4273; Search for: ORCID identifier: https://orcid.org/0000-0002-4279-6946; Search for: ORCID identifier: https://orcid.org/0000-0001-7348-6900; Search for: ORCID identifier: https://orcid.org/0000-0002-0772-9326; Search for: ORCID identifier: https://orcid.org/0000-0001-8845-1225; Search for: ORCID identifier: https://orcid.org/0000-0002-2551-7554; Search for: ORCID identifier: https://orcid.org/0000-0002-3616-5160; Search for: ORCID identifier: https://orcid.org/0000-0002-8897-1973; Search for: ORCID identifier: https://orcid.org/0000-0002-8912-0732; Search for: ORCID identifier: https://orcid.org/0000-0003-2155-9578; Search for: ORCID identifier: https://orcid.org/0000-0002-9822-8008; Search for: ORCID identifier: https://orcid.org/0000-0002-4795-697X; Search for: ORCID identifier: https://orcid.org/0000-0001-7694-6650; Search for: ORCID identifier: https://orcid.org/0000-0003-1842-6096; Search for: ORCID identifier: https://orcid.org/0000-0001-5799-9714; Search for: ORCID identifier: https://orcid.org/0000-0003-3463-7918; Search for: ORCID identifier: https://orcid.org/0000-0003-3154-3676; Search for: ORCID identifier: https://orcid.org/0000-0001-5504-229X; Search for: ORCID identifier: https://orcid.org/0000-0002-7374-7119; Search for: ORCID identifier: https://orcid.org/0000-0002-4823-1946; Search for: ORCID identifier: https://orcid.org/0000-0002-6823-2073; Search for: ORCID identifier: https://orcid.org/0000-0003-2631-6217; Search for: ORCID identifier: https://orcid.org/0000-0002-2088-3125; Search for: ORCID identifier: https://orcid.org/0000-0001-9784-8670; Search for: ORCID identifier: https://orcid.org/0000-0003-0607-8194; Search for: ORCID identifier: https://orcid.org/0000-0003-2548-2926; Search for: ORCID identifier: https://orcid.org/0000-0003-4535-9378; Search for: ORCID identifier: https://orcid.org/0000-0002-1491-3738; Search for: ORCID identifier: https://orcid.org/0000-0001-7314-9496; Search for: ORCID identifier: https://orcid.org/0000-0001-8278-1936
Affiliation
  1. National Research Council of Canada. Herzberg Astronomy and Astrophysics
FunderSearch for: Canada Foundation for Innovation; Search for: National Science Foundation; Search for: Gouvernement du Canada ∣ Natural Sciences and Engineering Research Council of Canada; Search for: National Science Foundation
FormatText, Article
Subjectradio transient sources; high energy astrophysics
Abstract
We present the discovery of 25 new repeating fast radio burst (FRB) sources found among CHIME/FRB events detected between 2019 September 30 and 2021 May 1. The sources were found using a new clustering algorithm that looks for multiple events colocated on the sky having similar dispersion measures (DMs). The new repeaters have DMs ranging from ∼220 to ∼1700 pc cm⁻³, and include sources having exhibited as few as two bursts to as many as twelve. We report a statistically significant difference in both the DM and extragalactic DM (eDM) distributions between repeating and apparently nonrepeating sources, with repeaters having a lower mean DM and eDM, and we discuss the implications. We find no clear bimodality between the repetition rates of repeaters and upper limits on repetition from apparently nonrepeating sources after correcting for sensitivity and exposure effects, although some active repeating sources stand out as anomalous. We measure the repeater fraction over time and find that it tends to an equilibrium of 2.6⁺².⁹₋₂.₆ over our total time-on-sky thus far. We also report on 14 more sources, which are promising repeating FRB candidates and which merit follow-up observations for confirmation.
Publication date
PublisherIOP
Licence
In
  • The Astrophysical Journal 947, no. 2, 83 (26 April 2023): 1–31.
LanguageEnglish
Peer reviewedYes
Export citationExport as RIS
Report a correctionReport a correction (opens in a new tab)
Record identifiera152a76f-ffc4-4195-b831-e3aa4bd798e7
Record created2023-08-02
Record modified2023-08-02
Date modified: