2025ApJ...991L..25L

Query : 2025ApJ...991L..25L

2025ApJ...991L..25L - Astrophys. J., 991, L25 (2025/September-3)

Stellar Mass-Dispersion Measure Correlations Constrain Baryonic Feedback in Fast Radio Burst Host Galaxies.

LEUNG C., SIMHA S., MEDLOCK I., NAGAI D., MASUI K.W., KAHINGA L.A., LANMAN A.E., ANDREW S., BANDURA K., CURTIN A.P., GAENSLER B.M., GUSINSKAIA N., JOSEPH R.C., LAZDA M., MAS-RIBAS L., MEYERS B.W., NIMMO K., PEARLMAN A.B., PROCHASKA J.X., SAMMONS M.W., SHIN K., SMITH K., WANG H. (The CHIME/FRB Collaboration)

Abstract (from CDS):

Low-redshift fast radio bursts (FRBs) enable robust measurements of the host galaxy contribution to the dispersion measure (DM), offering valuable constraints on the circumgalactic medium (CGM) of FRB hosts. We curate a sample of 20 nearby FRBs with low scattering timescales and face-on host galaxies with stellar masses in the range 109 < M*/M⊙ < 1011. We fit the distribution of the host galaxy DM to a quadratic model as a function of stellar mass with a mass-independent scatter and find that the more massive the host, the lower its host DM. We report that this relation has a negative slope of m = -97 ± 44 pc cm–3 dex–1 in stellar mass. We compare this measurement against similar fits to three subgrid models implemented in the CAMELS suite of simulations from Astrid, IllustrisTNG, and SIMBA, which predict the CGM contribution to this relation, finding disagreement with the fiducial CAMELS-Astrid model, particularly for the most massive hosts (M* > 1010.5M⊙). More generally, models that attribute a positive correlation between stellar mass and host DM (m > 0) to the CGM are in tension with our measurement unless compensated by fine-tuning of the host interstellar medium contribution as a function of stellar mass, e.g., at the low-mass end. We show that this conclusion is robust to a wide range of assumptions, such as the offset distribution of FRBs from their hosts and the statistics of the cosmic contribution to the DM budget along each sight line. Our results indirectly imply a lower limit on the strength of baryonic feedback in the local Universe (z < 0.2) in isolated ∼L* halos, complementing results from weak-lensing surveys and kSZ observations that target higher halo mass and redshift ranges.

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

Journal keyword(s): Circumgalactic medium - Radio transient sources - Interstellar medium

Simbad objects: 38

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Number of rows : 38
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 20210603A rB 00 41 05.774 +21 13 34.57           ~ 17 0
3 FRB 20240310A rB 01 10 57.700 -44 24 05.24           ~ 10 0
4 FRB 20231011A G 01 12 57.86 +41 44 56.8           ~ 8 0
5 FRB 20230526A rB 01 29 27.500 -52 46 07.70           ~ 12 0
6 FRB 20231229A G 01 45 52.28 +35 06 46.5           ~ 8 0
7 FRB 20180916B rB 01 58 00.750 +65 43 00.30           ~ 457 0
8 FRB 20220319D rB 02 08 42.700 +71 02 06.94           ~ 39 0
9 FRB 20231201A G 03 38 21.43 +26 49 03.6           ~ 7 0
10 FRB 20231230A G 04 51 11.43 +02 23 38.3           ~ 8 0
11 FRB 20231123A G 05 30 29.58 +04 28 31.9           ~ 8 0
12 FRB 20181119D rB 05 31 58.6980 +33 08 52.588           ~ 933 0
13 FRB 20230222A G 07 07 50.49 +11 13 28.3           ~ 8 0
14 FRB 20231120A rB 09 35 56.150 +73 17 04.80           ~ 16 0
15 FRB 20240201A rB 10 01 49.110 +13 54 48.53           ~ 12 0
16 FRB 20230203A G 10 06 38.78 +35 41 38.8           ~ 8 0
17 FRB 20231226A rB 10 21 07.600 +06 07 45.90           ~ 11 0
18 FRB 211212 rB 10 30 40.700 +01 40 36.80           ~ 30 0
19 FRB 20230628A rB 11 07 08.810 +72 16 54.64           ~ 16 0
20 FRB 20231128A G 13 18 18.77 +42 59 33.8           ~ 7 0
21 FRB 211127 rB 13 19 09.500 -18 49 28.40           ~ 32 0
22 FRB 20190303A G 13 51 59.77 +48 06 57.6           ~ 58 0
23 FRB 200430 rB 15 18 49.54 +12 22 36.8           ~ 59 0
24 FRB 20230222B G 15 54 57.39 +30 53 55.3           ~ 8 0
25 FRB 20220920A rB 16 01 01.700 +70 55 07.68           ~ 28 0
26 FRB 20231005A G 16 24 06.72 +35 26 55.4           ~ 8 0
27 FRB 20210405I rB 17 01 21.50 -49 32 42.8           ~ 17 0
28 FRB 20231223C G 17 18 10.72 +29 29 52.6           ~ 8 0
29 FRB 20230926A G 17 56 29.97 +41 48 51.5           ~ 8 0
30 FRB 20220914A rB 18 48 13.630 +73 20 12.89           ~ 31 0
31 FRB 20220509G rB 18 50 40.800 +70 14 37.80           ~ 37 0
32 FRB 20240209A rB 19 19 33.0 +86 03 52           ~ 21 0
33 FRB 210807 rB 19 56 49.000 -00 48 51.40           ~ 27 0
34 FRB 20220207C rB 20 40 47.890 +72 52 56.38           ~ 29 0
35 FRB 20210410D rB 21 44 20.70 -79 19 05.5           ~ 23 0
36 FRB 190608 rB 22 16 04.74 -07 53 53.6           ~ 102 0
37 FRB 20220725A rB 22 27 00.000 +34 53 00.00           ~ 13 0
38 FRB 20220912A rB 23 09 04.9 +48 42 25           ~ 126 0

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