2023ApJ...944...50W

Query : 2023ApJ...944...50W

2023ApJ...944...50W - Astrophys. J., 944, 50 (2023/February-2)

An 8.0% Determination of the Baryon Fraction in the Intergalactic Medium from Localized Fast Radio Bursts.

WANG B. and WEI J.-J.

Abstract (from CDS):

The dispersion measure (DM)-redshift relation of fast radio bursts (FRBs) has been proposed as a potential new tool for probing the intergalactic medium (IGM) and for studying cosmology. However, poor knowledge of the baryon fraction in the IGM (fIGM) and its degeneracy with cosmological parameters impose restrictions on the cosmological applications of FRBs. Furthermore, DMs contributed by the IGM (DMIGM) and host galaxy (DMhost), important cosmological quantities, cannot be exactly extracted from observations, which would bring uncontrolled systematic uncertainties in FRB cosmology. In this work, we use 17 localized FRBs to constrain fIGM and its possible redshift evolution. Other cosmological probes such as type Ia supernovae, baryon acoustic oscillations, and cosmic microwave background radiation are combined to break parameter degeneracy. Taking into account the probability distributions of DMIGM and DMhost derived from the IllustrisTNG simulation, we obtain a robust measurement of fIGM = 0.927 ± 0.075, representing a precision of 8.0%. We find that there is no strong evidence for the redshift dependence of fIGM at the current observational data level. The rapid progress in localizing FRBs will significantly improve the constraints on fIGM.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Radio transient sources - Intergalactic medium - Observational cosmology - Cosmological parameters

Simbad objects: 22

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Number of rows : 22
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 20180916B rB 01 58 00.750 +65 43 00.30           ~ 457 0
2 FRB 200906 rB 03 33 59.08 -14 04 59.5           ~ 43 0
3 FRB 20190614D rB 04 20 18.13 +73 42 24.3           ~ 37 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 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
8 FRB 20200120E rB 09 57 56.7 +68 49 32           ~ 219 0
9 NAME FRB 181030.J1054+73 rB 10 33 24.0000 +73 47 24.000           ~ 79 0
10 FRB 190714 rB 12 15 55.1 -13 01 16           ~ 64 0
11 FRB 190523 rB 13 48 15.6 +72 28 11           ~ 109 0
12 FRB 200430 rB 15 18 49.54 +12 22 36.8           ~ 59 0
13 FRB 20190520B rB 16 02 04.270 -11 17 17.32           ~ 211 0
14 FRB 190611 rB 21 22 58.91 -79 23 51.3           ~ 82 0
15 FRB 190102 rB 21 29 39.76 -79 28 32.5           ~ 83 0
16 FRB 191001 rB 21 33 24.373 -54 44 51.40           ~ 64 0
17 FRB 180924 rB 21 44 25.255 -40 54 00.10           ~ 140 0
18 FRB 181112 rB 21 49 23.630 -52 58 15.39           ~ 131 0
19 FRB 20190711A rB 21 57 40.7 -80 21 29           ~ 114 0
20 FRB 190608 rB 22 16 04.74 -07 53 53.6           ~ 102 0
21 FRB 191228 rB 22 57 43.30 -29 35 38.7           ~ 37 0
22 FRB 20220610A rB 23 24 17.569 -33 30 49.37           ~ 31 0

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