2025ApJ...993L..27H

Query : 2025ApJ...993L..27H

2025ApJ...993L..27H - Astrophys. J., 993, L27 (2025/November-1)

A Correlation between Fast Radio Burst Dispersion Measure and Foreground Large-scale Structure.

HUSSAINI M., CONNOR L., KONIETZKA R.M., RAVI V., FABER J., SHARMA K. and SHERMAN M.

Abstract (from CDS):

The distribution of baryons in the Universe remains a fundamental open question in astronomy, and the dispersion measure (DM) of fast radio bursts (FRBs) serves as a valuable tool for probing this cosmic gas. We investigate the impact of the foreground cosmic web on FRB DMs, using 61 localized FRBs and public galaxy catalogs. We test for the large-scale structure's impact on the cosmological DM using two methods. First, we searched for a correlation between the galaxy number density along the line of sight and the extragalactic DM and found a statistically significant positive correlation (p = 1.76 × 10–5). The shape of this correlation contains information about the cosmic baryon distribution and can also be used to better constrain the host galaxy DM, by providing an estimate of the cosmic contribution on a per-source basis. We observe similar correlations in a mock FRB survey based on the IllustrisTNG cosmological simulation, where the DM is dominated by filaments in the intergalactic medium (IGM) and not by halos. Next, we performed a stacking analysis that measures the average excess DM as a function of the impact parameter of foreground galaxies to obtain spatial information about how ionized gas is distributed around galaxy halos. We report excess DM in the stacked signal for impact parameters up to megaparsec scales (∼3σ). Finally, we identified FRBs that do not appear to intersect intervening halos within r200, allowing us to estimate the fraction of baryons that reside in the IGM. We find fIGM ≥ 0.69 at 95 % confidence, indicating significant astrophysical feedback.

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

Journal keyword(s): Large-scale structure of the universe - Radio transient sources - Intergalactic medium - Extragalactic astronomy

Simbad objects: 61

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Number of rows : 61
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 20240210A rB 00 39 55.040 -27 39 34.78           ~ 12 0
2 FRB 20221116A rB 01 24 50.450 +72 39 14.10           ~ 14 0
3 FRB 20180916B rB 01 58 00.750 +65 43 00.30           ~ 457 0
4 FRB 20220319D rB 02 08 42.700 +71 02 06.94           ~ 39 0
5 FRB 200906 rB 03 33 59.08 -14 04 59.5           ~ 43 0
6 FRB 20221106A rB 03 46 38.100 -25 39 44.90           ~ 12 0
7 FRB 20240123A rB 04 24 32.161 +71 35 47.37           ~ 10 0
8 FRB 20240224A rB 04 39 53.456 +71 36 16.85           ~ 1 0
9 FRB 20221113A rB 04 45 38.640 +70 18 26.60           ~ 14 0
10 FRB 20220726A rB 04 55 46.960 +69 55 44.80           ~ 16 0
11 FRB 20201124A rB 05 07 57.600 +26 11 24.00           ~ 307 0
12 FRB 20181119D rB 05 31 58.6980 +33 08 52.588           ~ 933 0
13 FRB 180301 rB 06 12 43.40 +04 33 44.8           ~ 125 0
14 FRB 20231220A rB 08 08 49.305 +71 43 18.17           ~ 10 0
15 FRB 20221027A rB 08 43 29.230 +72 06 03.50           ~ 14 0
16 FRB 20220310F rB 08 58 52.920 +73 29 27.00           ~ 25 0
17 FRB 20240304A rB 09 05 19.300 -16 13 41.50           ~ 2 0
18 FRB 20221029A rB 09 27 51.220 +72 27 08.34           ~ 15 0
19 FRB 20231120A rB 09 35 56.150 +73 17 04.80           ~ 16 0
20 FRB 20240201A rB 10 01 49.110 +13 54 48.53           ~ 12 0
21 FRB 20231226A rB 10 21 07.600 +06 07 45.90           ~ 11 0
22 FRB 20230216A rB 10 25 53.320 +03 26 12.57           ~ 12 0
23 FRB 211212 rB 10 30 40.700 +01 40 36.80           ~ 30 0
24 FRB 20240213A rB 10 35 02.703 +71 46 31.29           ~ 10 0
25 FRB 20220330D rB 10 55 00.300 +70 21 02.70           ~ 15 0
26 FRB 20230628A rB 11 07 08.810 +72 16 54.64           ~ 16 0
27 FRB 20230712A rB 11 09 26.050 +72 33 28.02           ~ 13 0
28 FRB 20240229A rB 11 34 56.311 +71 47 01.68           ~ 10 0
29 FRB 20230307A rB 11 51 07.520 +71 41 44.30           ~ 14 0
30 FRB 190714 rB 12 15 55.1 -13 01 16           ~ 64 0
31 FRB 211127 rB 13 19 09.500 -18 49 28.40           ~ 32 0
32 FRB 210320 rB 13 37 16.800 -15 24 37.30           ~ 29 0
33 FRB 190523 rB 13 48 15.6 +72 28 11           ~ 109 0
34 FRB 20220105A rB 13 55 12.94 +22 27 59.4           ~ 19 0
35 FRB 20240119A rB 14 32 28.067 +71 45 19.55           ~ 10 0
36 FRB 20220418A rB 14 36 25.340 +70 05 45.40           ~ 24 0
37 FRB 200430 rB 15 18 49.54 +12 22 36.8           ~ 59 0
38 FRB 20230124A rB 15 27 39.900 +70 58 05.20           ~ 15 0
39 FRB 20230626A rB 15 42 31.100 +71 08 00.77           ~ 14 0
40 FRB 20220920A rB 16 01 01.700 +70 55 07.68           ~ 28 0
41 FRB 20231123B rB 16 10 09.160 +70 47 06.20           ~ 14 0
42 FRB 20221219A rB 17 10 31.150 +71 37 36.63           ~ 19 0
43 FRB 20240215A rB 17 53 43.990 +71 39 14.28           ~ 10 0
44 FRB 20220204A rB 18 16 54.300 +69 43 21.01           ~ 15 0
45 FRB 20221012A rB 18 43 11.690 +70 31 27.15           ~ 25 0
46 FRB 20220914A rB 18 48 13.630 +73 20 12.89           ~ 31 0
47 FRB 20220509G rB 18 50 40.800 +70 14 37.80           ~ 37 0
48 FRB 210807 rB 19 56 49.000 -00 48 51.40           ~ 27 0
49 FRB 20220207C rB 20 40 47.890 +72 52 56.38           ~ 29 0
50 FRB 20220825A rB 20 47 55.550 +72 35 05.89           ~ 25 0
51 FRB 20221203A rB 20 57 10.834 +71 33 39.68           ~ 1 0
52 FRB 20220506D rB 21 12 10.760 +72 49 38.20           ~ 24 0
53 FRB 20220208A rB 21 30 18.030 +70 02 27.75           ~ 15 0
54 FRB 190608 rB 22 16 04.74 -07 53 53.6           ~ 102 0
55 FRB 20230814B rB 22 16 49.092 +71 31 54.04           ~ 5 0
56 FRB 20210117A rB 22 39 55.015 -16 09 05.45           ~ 49 0
57 FRB 20230501A rB 22 40 06.520 +70 55 19.82           ~ 14 0
58 FRB 20221101B rB 22 48 51.890 +70 40 52.20           ~ 18 0
59 FRB 191228 rB 22 57 43.30 -29 35 38.7           ~ 37 0
60 FRB 20230521B rB 23 18 42.840 +71 31 19.07           ~ 10 0
61 FRB 20220307B rB 23 23 29.880 +72 11 32.59           ~ 26 0

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