2024ApJ...974..274F

Query : 2024ApJ...974..274F

2024ApJ...974..274F - Astrophys. J., 974, 274 (2024/October-3)

Morphologies of Bright Complex Fast Radio Bursts with CHIME/FRB Voltage Data.

FABER J.T., MICHILLI D., MCKINVEN R., SU J., PEARLMAN A.B., NIMMO K., MAIN R.A., KASPI V., BHARDWAJ M., CHATTERJEE S., CURTIN A.P., DOBBS M., EADIE G., GAENSLER B.M., KADER Z., LEUNG C., MASUI K.W., PANDHI A., PETROFF E., PLEUNIS Z., RAFIEI-RAVANDI M., SAND K.R., SCHOLZ P., SHIN K., SMITH K. and STAIRS I.

Abstract (from CDS):

We present the discovery of 12 apparently nonrepeating fast radio burst (FRB) sources, detected by the Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope. These sources, only one of which has been presented previously in the first CHIME/FRB catalog, were selected from a database comprising ${ \mathcal O }({10}^{3})$ CHIME/FRB full-array raw voltage data recordings, based on their large signal-to-noise ratios and complex morphologies. Our study examines the time-frequency characteristics of these bursts, including drifting, microstructure, and periodicities. The events in this sample display a variety of unique drifting phenomenologies that deviate from the linear negative drifting phenomenon seen in many repeating FRBs, and motivate a possible new framework for classifying drifting archetypes. Additionally, we detect microstructure features of duration ≲50 μs in seven events, with some as narrow as ≃7 μs. We find no evidence of significant periodicities between subburst components. Furthermore, we report the polarization characteristics of seven events, including their polarization fractions and Faraday rotation measures (RMs). The observed ∣RM∣ values span a wide range of 17.24(2)-328.06(2) rad m–2, with apparent linear polarization fractions between 0.340(1) and 0.946(3). The morphological properties of the bursts in our sample appear broadly consistent with predictions from both relativistic shock and magnetospheric models of FRB emission, as well as propagation through discrete ionized plasma structures. We address these models and discuss how they can be tested using our improved understanding of morphological archetypes.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Radio transient sources - High energy astrophysics - Compact objects

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 FRB 20210627A rB 00 13 28.0 +00 24 43           ~ 1 0
2 FRB 20180916B rB 01 58 00.750 +65 43 00.30           ~ 457 0
3 FRB 20210813A rB 04 31 15.0 +39 55 57           ~ 1 0
4 FRB 20201124A rB 05 07 57.600 +26 11 24.00           ~ 307 0
5 FRB 20181119D rB 05 31 58.6980 +33 08 52.588           ~ 933 0
6 FRB 180301 rB 06 12 43.40 +04 33 44.8           ~ 125 0
7 FRB 20190630D rB 09 33 26.4000 +08 54 00.000           ~ 10 0
8 FRB 20200120E rB 09 57 56.7 +68 49 32           ~ 219 0
9 FRB 20200603B rB 10 09 37.0 +71 34 48           ~ 1 0
10 FRB 20210819A rB 11 44 03.0 +30 00 40           ~ 1 0
11 FRB 20200711F rB 12 10 41.0 +48 23 48           ~ 1 0
12 FRB 20191225A rB 15 28 37.0 +85 29 32           ~ 1 0
13 FRB 20211005A rB 15 44 01.0 +20 43 26           ~ 1 0
14 FRB 20220413B rB 16 49 03.0 +66 58 56           ~ 1 0
15 FRB 20190425A rB 17 02 41.0 +21 34 34           ~ 47 0
16 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
17 PSR J1745-2900 Psr 17 45 40.1640 -29 00 29.818           ~ 358 0
18 FRB 20201230B rB 19 00 44.0 +26 01 15           ~ 1 0
19 FRB 20210406E rB 19 08 26.0 +71 20 16           ~ 1 0
20 NAME Sgr 1935+2154 * 19 34 55.68 +21 53 48.2           ~ 820 1
21 FRB 20210427A rB 20 30 33.0 +79 15 54           ~ 1 0

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