Nine New Repeating Fast Radio Burst Sources from CHIME/FRB

By E. Fonseca, B. Andersen, M. Bhardwaj, P. Chawla, D. Good, A. Josephy, Victoria Kaspi, K. Masui, R. Mckinven, D. Michilli and 31 more. Astrophysical Journal, 2020

201 citations recorded by the source corpus.

We report on the discovery and analysis of bursts from nine new repeating fast radio burst (FRB) sources found using the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope. These sources span a dispersion measure (DM) range of 195–1380 pc cm−3. We detect two bursts from three of the new sources, three bursts from four of the new sources, four bursts from one new source, and five bursts from one new source. We determine sky coordinates of all sources with uncertainties of ∼10′. We detect Faraday rotation measures (RMs) for two sources, with values −20(1) and −499.8(7) rad m−2, that are substantially lower than the RM derived from bursts emitted by FRB 121102. We find that the DM distribution of our events, combined with the nine other repeaters discovered by CHIME/FRB, is indistinguishable from that of thus far non-repeating CHIME/FRB events. However, as previously reported, the burst widths appear statistically significantly larger than the thus far non-repeating CHIME/FRB events, further supporting the notion of inherently different emission mechanisms and/or local environments. These results are consistent with previous work, though are now derived from 18 repeating sources discovered by CHIME/FRB during its first year of operation. We identify candidate galaxies that may contain FRB 190303.J1353+48 (DM = 222.4 pc cm−3).

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/ce0d4d8d80e9aa34475ec4658068b58c1af8cf61

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Citations in the corpus

• Possible periodic activity in the repeating FRB 121102 (2020, background): “Since then, 19 more repeaters have been discovered (Fonseca et al. 2020; CHIME/FRB Collaboration et al. 2019; Kumar et al. 2019).”
• Characterizing the Fast Radio Burst Host Galaxy Population and its Connection to Transients in the Local and Extragalactic Universe (2021, background): “…the sky locations and dispersion measures (DMs) of the two FRB populations are consistent with being drawn from the same distribution, the bursts from repeating sources have wider pulse widths and narrower bandwidths compared to apparent nonrepeaters (Fonseca et al. 2020; Pleunis et al. 2021).”
• The Host Galaxies and Progenitors of Fast Radio Bursts Localized with the Australian Square Kilometre Array Pathfinder (2020, background): “With a wide field-of-view and great sensitivity, CHIME has published the detection of 30 FRBs, 17 of which are repeating [10, 11, 12, 13].”
• A Nearby Repeating Fast Radio Burst in the Direction of M81 (2021, methodology): “We used the calibration methods described by CHIME/FRB Collaboration et al. (2019c) and Fonseca et al. (2020) to determine the fluences of the three bursts (see Table 1), assuming the baseband localization position.”
• Fast Radio Burst Morphology in the First CHIME/FRB Catalog (2021, background): “…2020; CHIME/FRB Collaboration et al. 2020a), and downwarddrifting subbursts seem ubiquitous among repeater bursts (detected in at least 19 bursts from 13 different sources among the 58 bursts from 19 sources in CHIME/FRB Collaboration et al. 2019a, 2019b; Josephy et al. 2019; Fonseca et al. 2020).”