2026ApJ...997L...6Y

Query : 2026ApJ...997L...6Y

2026ApJ...997L...6Y - Astrophys. J., 997, L6 (2026/January-3)

No Metallicity Preference in Fast Radio Burst Host Galaxies.

YAMASAKI S., HASHIMOTO T., KUSAKABE H. and GOTO T.

Abstract (from CDS):

Fast radio bursts (FRBs) are millisecond-duration extragalactic radio transients of unknown origin, and studying their host galaxies could offer clues to constrain progenitor models. Among host properties, gas-phase metallicity is a key factor influencing stellar evolution and transient productions. We analyze the largest uniformly selected sample of FRB host galaxies, measuring oxygen abundances ($12+{\rm{log}}({\rm{O}}/{\rm{H}})=8.04$-8.85) for 31 hosts at redshifts z = 0.04-0.98, using consistent emission-line diagnostics. Using a volume-limited subsample, we compare the distributions of stellar mass, star formation rate (SFR), and metallicity to a control sample of star-forming galaxies selected by the same criteria. We find that FRB host galaxies span a wide metallicity range and are broadly consistent with the SFR-weighted mass-metallicity relation of star-forming galaxies. We find no clear lower metallicity bound, suggesting that FRB progenitors can form in any metallicity environment through channels largely insensitive to metal abundance. Encouragingly, this implies that FRBs can arise even in low-metallicity, high-redshift galaxies, supporting their potential as probes of matter distribution across cosmic time. Additionally, we find marginal (∼2σ) evidence for a -0.09 ± 0.04 dex metallicity offset from the fundamental metallicity relation. Despite model uncertainties, if real, this offset likely reflects suppressed SFRs at fixed mass and metallicity rather than metal deficiency. Similar offsets are observed in local post-merger galaxies and may reflect a post-starburst phase following galaxy interactions. Such systems may host FRB progenitors formed during the starburst that produce FRBs after a 100-500 Myr delay, broadly consistent with observed delay-time distributions, although further data are needed to confirm this interpretation.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Radio transient sources - Metallicity - Galaxy evolution

Simbad objects: 50

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Number of rows : 50
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 20221116A rB 01 24 50.450 +72 39 14.10           ~ 14 0
2 FRB 20180916B rB 01 58 00.750 +65 43 00.30           ~ 457 0
3 FRB 20220319D rB 02 08 42.700 +71 02 06.94           ~ 39 0
4 FRB 200906 rB 03 33 59.08 -14 04 59.5           ~ 43 0
5 FRB 20221113A rB 04 45 38.640 +70 18 26.60           ~ 14 0
6 FRB 20220726A rB 04 55 46.960 +69 55 44.80           ~ 16 0
7 FRB 20201124A rB 05 07 57.600 +26 11 24.00           ~ 307 0
8 FRB 20181119D rB 05 31 58.6980 +33 08 52.588           ~ 933 0
9 FRB 180301 rB 06 12 43.40 +04 33 44.8           ~ 125 0
10 FRB 20220310F rB 08 58 52.920 +73 29 27.00           ~ 25 0
11 FRB 20221029A rB 09 27 51.220 +72 27 08.34           ~ 15 0
12 FRB 20231120A rB 09 35 56.150 +73 17 04.80           ~ 16 0
13 FRB 211212 rB 10 30 40.700 +01 40 36.80           ~ 30 0
14 FRB 20230628A rB 11 07 08.810 +72 16 54.64           ~ 16 0
15 FRB 20230712A rB 11 09 26.050 +72 33 28.02           ~ 13 0
16 FRB 20230307A rB 11 51 07.520 +71 41 44.30           ~ 14 0
17 FRB 190714 rB 12 15 55.1 -13 01 16           ~ 64 0
18 FRB 211127 rB 13 19 09.500 -18 49 28.40           ~ 32 0
19 FRB 210320 rB 13 37 16.800 -15 24 37.30           ~ 29 0
20 FRB 211203 rB 13 37 52.800 -31 22 04.00           ~ 20 0
21 FRB 20220105A rB 13 55 12.94 +22 27 59.4           ~ 19 0
22 FRB 20220418A rB 14 36 25.340 +70 05 45.40           ~ 24 0
23 FRB 200430 rB 15 18 49.54 +12 22 36.8           ~ 59 0
24 FRB 20230124A rB 15 27 39.900 +70 58 05.20           ~ 15 0
25 FRB 20230626A rB 15 42 31.100 +71 08 00.77           ~ 14 0
26 FRB 20220920A rB 16 01 01.700 +70 55 07.68           ~ 28 0
27 FRB 20190520B rB 16 02 04.270 -11 17 17.32           ~ 211 0
28 FRB 20231123B rB 16 10 09.160 +70 47 06.20           ~ 14 0
29 FRB 20221219A rB 17 10 31.150 +71 37 36.63           ~ 19 0
30 FRB 20220204A rB 18 16 54.300 +69 43 21.01           ~ 15 0
31 FRB 20221012A rB 18 43 11.690 +70 31 27.15           ~ 25 0
32 FRB 20220914A rB 18 48 13.630 +73 20 12.89           ~ 31 0
33 FRB 20220509G rB 18 50 40.800 +70 14 37.80           ~ 37 0
34 FRB 210807 rB 19 56 49.000 -00 48 51.40           ~ 27 0
35 FRB 20230708A rB 20 12 56.900 -55 22 50.40           ~ 14 0
36 FRB 20220207C rB 20 40 47.890 +72 52 56.38           ~ 29 0
37 FRB 20220825A rB 20 47 55.550 +72 35 05.89           ~ 25 0
38 FRB 20220506D rB 21 12 10.760 +72 49 38.20           ~ 24 0
39 FRB 190611 rB 21 22 58.91 -79 23 51.3           ~ 82 0
40 FRB 190102 rB 21 29 39.76 -79 28 32.5           ~ 83 0
41 FRB 191001 rB 21 33 24.373 -54 44 51.40           ~ 64 0
42 FRB 20210410D rB 21 44 20.70 -79 19 05.5           ~ 23 0
43 FRB 180924 rB 21 44 25.255 -40 54 00.10           ~ 140 0
44 FRB 181112 rB 21 49 23.630 -52 58 15.39           ~ 131 0
45 FRB 20190711A rB 21 57 40.7 -80 21 29           ~ 114 0
46 FRB 190608 rB 22 16 04.74 -07 53 53.6           ~ 102 0
47 FRB 20210117A rB 22 39 55.015 -16 09 05.45           ~ 49 0
48 FRB 20230501A rB 22 40 06.520 +70 55 19.82           ~ 14 0
49 FRB 20221101B rB 22 48 51.890 +70 40 52.20           ~ 18 0
50 FRB 20220307B rB 23 23 29.880 +72 11 32.59           ~ 26 0

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