2025ApJ...982..154N

Query : 2025ApJ...982..154N

2025ApJ...982..154N - Astrophys. J., 982, 154 (2025/April-1)

Polarization Properties of 28 Repeating Fast Radio Burst Sources with CHIME/FRB.

NG C., PANDHI A., MCKINVEN R., CURTIN A.P., SHIN K., FONSECA E., GAENSLER B.M., JOW D.L., KASPI V., LI D., MAIN R., MASUI K.W., MICHILLI D., NIMMO K., PLEUNIS Z., SCHOLZ P., STAIRS I., BHARDWAJ M., BRAR C., CASSANELLI T., JOSEPH R.C., PEARLMAN A.B., RAFIEI-RAVANDI M. and SMITH K.

Abstract (from CDS):

As part of the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) project, we report 41 new rotation measures (RMs) from 20 repeating fast radio bursts (FRBs) obtained between 2019 and 2023 for which no previous RM was determined. We also report 22 additional RM measurements for eight further repeating FRBs. We observe temporal RM variations in practically all repeating FRBs. Repeaters appear to be separated into two categories: those with dynamic and those with stable RM environments, differentiated by the ratios of RM standard deviations to the averaged RM magnitudes. Sources from stable RM environments likely have small RM contributions from the interstellar medium of their host galaxies, whereas sources from dynamic RM environments share some similarities with Galactic pulsars in eclipsing binaries but appear distinct from solitary pulsars in the Galactic centre. We observe a new stochastic, secular, and again stochastic trend in the temporal RM variation of FRB 20180916B, which does not support binary orbit modulation being its cause. We highlight two more repeaters that show RM sign change, namely FRBs 20290929C and 20190303A. We perform an updated comparison of polarization properties between repeating and nonrepeating FRBs, which show a marginal dichotomy in their distribution of electron-density-weighted parallel-component line-of-sight magnetic fields.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Radio transient sources - Polarimetry - Radio bursts

Simbad objects: 43

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Number of rows : 43
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 20200223B rB 00 28 16.800 +29 00 36.00           ~ 25 0
2 FRB 20190915D rB 00 47 +46.9           ~ 6 0
3 FRB 20200929C rB 01 08 +18.5           ~ 9 0
4 FRB 20200809E rB 01 21 +82.9           ~ 4 0
5 FRB 20200202A rB 01 44 +44.3           ~ 3 0
6 FRB 20180916B rB 01 58 00.750 +65 43 00.30           ~ 457 0
7 FRB 20191013D rB 02 42 +13.6           ~ 4 0
8 FRB 20201130A rB 04 18 +08.0           ~ 7 0
9 FRB 20190609C rB 04 52 40.8000 +24 03 36.000           ~ 16 0
10 FRB 20201124A rB 05 07 57.600 +26 11 24.00           ~ 307 0
11 FRB 20181119D rB 05 31 58.6980 +33 08 52.588           ~ 933 0
12 FRB 180301 rB 06 12 43.40 +04 33 44.8           ~ 125 0
13 FRB 20200118D rB 07 08 +42.9           ~ 4 0
14 FRB 20200127B rB 07 55 +86.6           ~ 5 0
15 FRB 20201221B rB 08 17 +48.8           ~ 5 0
16 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
17 FRB 20200120E rB 09 57 56.7 +68 49 32           ~ 219 0
18 NAME FRB 181119.J12+65 rB 12 41 52.0 +65 07 02           ~ 26 0
19 CPD-63 2495 HXB 13 02 47.6544015048 -63 50 08.626970292 10.34 10.72 9.98 10.03   O9.5Ve 852 0
20 FRB 20191106C rB 13 18 +43.0           ~ 22 0
21 FRB 20190303A G 13 51 59.77 +48 06 57.6           ~ 58 0
22 NAME FRB 190604.J1435+53 rB 14 34 47.0 +53 18 20           ~ 33 0
23 FRB 20201114A rB 14 46 +71.8           ~ 6 0
24 FRB 20190520B rB 16 02 04.270 -11 17 17.32           ~ 211 0
25 FRB 20190110C rB 16 27 55.2000 +41 25 12.000           ~ 36 0
26 FRB 20190804E rB 17 25 +55.1           ~ 7 0
27 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
28 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
29 PSR J1745-2900 Psr 17 45 40.1640 -29 00 29.818           ~ 358 0
30 PSR J1745-2912 Psr 17 45 50 -29 12.0           ~ 14 0
31 PSR J1746-2849 Psr 17 46 03.7 -28 49 19           ~ 22 0
32 PSR J1746-2850 Psr 17 46 06.6 -28 50 42           ~ 18 0
33 PSR J1746-2856 Psr 17 46 49.50 -28 56 31.0           ~ 28 0
34 PSR B1744-24A Psr 17 48 02.249 -24 46 37.65           ~ 235 0
35 FRB 20200619A rB 18 10 +55.6           ~ 6 0
36 FRB 20190430C rB 18 28 52.8000 +24 55 12.000           ~ 17 0
37 FRB 20200926A rB 18 53 +53.9           ~ 4 0
38 NAME FRB 190208.J1855+46 rB 18 54 07.0 +46 55 20           ~ 30 0
39 V* LY Aqr Psr 20 51 07.52058 -08 27 37.6100           ~ 236 2
40 NAME FRB 190117.J2207+17 rB 22 06 38.0 +17 22 06           ~ 28 0
41 FRB 171019 rB 22 17.5 -08 40           ~ 52 0
42 FRB 20220912A rB 23 09 04.9 +48 42 25           ~ 126 0
43 FRB 20180910A rB 23 31 04.8000 +88 12 36.000           ~ 14 0

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