2024MNRAS.533.4068A

Query : 2024MNRAS.533.4068A

2024MNRAS.533.4068A - Mon. Not. R. Astron. Soc., 533, 4068-4080 (2024/October-1)

Probing the magnetized gas distribution in galaxy groups and the cosmic web with POSSUM Faraday rotation measures.

ANDERSON C.S., McCLURE-GRIFFITHS N.M., RUDNICK L., GAENSLER B.M., O'SULLIVAN S.P., BRADBURY S., AKAHORI T., BAIDOO L., BRUGGEN M., CARRETTI E., DUCHESNE S., HEALD G., JUNG S.L., KACZMAREK J., LEAHY D., LOI F., MA Y.K., OSINGA E., SETA A., STUARDI C., THOMSON A.J.M., VAN ECK C., VERNSTROM T. and WEST J.

Abstract (from CDS):

We present initial results from the Polarization Sky Survey of the Universe's Magnetism (POSSUM), analysing 22 817 Faraday rotation measures (RMs) with median uncertainties of 1.2 rad m$^{-2}$ across 1520 deg2 to study magnetized gas associated with 55 nearby galaxy groups ($z\lesssim 0.025$) with halo masses between $10^{12.5}$ and $10^{14.0}$ M$_\odot$. We identify two distinct gas phases: the intragroup medium (IGrM) within 0-2 splashback radii and the warm-hot intergalactic medium (WHIM) extending from 2 to 7 splashback radii. These phases enhance the standard deviation of residual (i.e. Galactic foreground RM-subtracted) RMs by $6.9\pm 1.8$ rad m$^{-2}$ and $4.2 \pm 1.2$ rad m$^{-2}$, respectively. Estimated magnetic field strengths are several μG within the IGrM and 0.1-1 μG in the WHIM. We estimate the plasma $\beta$ in both phases, and show that magnetic pressure might be more dynamically important than in the ICM of more massive clusters or sparse cosmic web filaments. Our findings indicate that 'missing baryons' in the WHIM likely extend beyond the gravitational radii of group-mass haloes to Mpc scales, consistent with large-scale, outflow-driven 'magnetized bubbles' seen in cosmological simulations. We demonstrate that RM grids are an effective method for detecting magnetized thermal gas at galaxy group interfaces and within the cosmic web. This approach complements X-ray and Sunyaev-Zel'dovich effect methods, and when combined with fast radio burst dispersion measures, data from the full POSSUM survey - comprising approximately a million RMs - will allow direct magnetic field measurements to further our understanding of baryon circulation in these environments and the magnetized universe.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): magnetic fields - techniques: polarimetric - galaxies: groups: general - intergalactic medium - radio continuum: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/533/4068): table.dat>

Simbad objects: 111

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Number of rows : 111
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 MCG-07-02-012 GiG 00 40 46.2376509912 -38 20 34.517880168   15.37       ~ 18 0
2 [T2015] nest 200705 GrG 00 41 15.4 -38 16 56           ~ 2 0
3 [T2015] nest 201359 GrG 00 42 48.8 -50 15 56           ~ 3 0
4 NGC 238 Sy2 00 43 25.7445053400 -50 10 58.333706292   13.28   12.14 12.5 ~ 35 0
5 [T2015] nest 200600 GrG 00 49 08.7 -52 08 20           ~ 3 0
6 2XMM J005041.7-521311 GiG 00 50 41.8755200568 -52 13 11.798621580   14.49   13.50   ~ 20 0
7 [T2015] nest 201311 GrG 01 09 29.5 -35 51 52           ~ 3 0
8 NGC 409 EmG 01 09 33.2116279440 -35 48 20.103008256   14.03   12.56   ~ 28 0
9 NGC 527 GiG 01 23 58.1497596696 -35 06 54.407099880   14.07   12.50   ~ 42 1
10 [T2015] nest 200348 GrG 01 24 13.41 -34 57 31.0           ~ 5 0
11 [T2015] nest 200258 GrG 01 25 08.4 -38 11 26           ~ 3 0
12 NGC 549 EmG 01 25 28.4814273744 -38 16 02.919657216   14.53   12.64   ~ 46 1
13 NGC 568 EmG 01 27 57.0073498224 -35 43 03.461572272 14.09 13.43 12.59 12.01   ~ 48 1
14 [CHM2007] HDC 76 GrG 01 28 27.64 -35 46 08.5           ~ 6 0
15 [T2015] nest 200165 GrG 01 38 18.9 -46 52 37           ~ 2 0
16 ESO 244-45 GiG 01 38 58.4859165720 -46 34 23.723962896   14.01   12.41   ~ 37 0
17 [T2015] nest 201241 GrG 01 39 03.6 -49 29 13           ~ 2 0
18 ESO 196-16 G 01 39 24.7510971384 -49 22 54.638353920   15.18   13.66   ~ 15 0
19 ESO 197-10 GiG 01 53 12.5769092544 -49 33 37.471124160   14.83 13.65 13.00 12.26 ~ 33 0
20 [T2015] nest 201112 GrG 01 53 20.7 -49 29 58           ~ 3 0
21 NGC 745 Sy2 01 54 07.7184477264 -56 41 37.289686308   14.04   12.64   ~ 44 0
22 [T2015] nest 200261 GrG 01 57 00.5 -56 13 43           ~ 3 0
23 NGC 782 Sy1 01 57 40.3913561808 -57 47 24.604527516   12.63   11.51 12.3 ~ 60 0
24 [T2015] nest 200327 GrG 01 59 30.6 -57 59 28           ~ 3 0
25 [CHM2007] HDC 115 GrG 02 05 15.54 -55 13 22.2           ~ 7 0
26 [T2015] nest 201362 GrG 02 05 50.2 -41 18 40           ~ 3 0
27 ESO 153-20 Sy2 02 06 03.4672137720 -55 11 36.873277656   14.06 14.31 12.67 13.3 ~ 65 0
28 NGC 822 EmG 02 06 39.1347842424 -41 09 24.259095468   14.25   12.81   ~ 37 0
29 [T2015] nest 200771 GrG 02 09 17.6 -07 37 25           ~ 3 0
30 NGC 835 Sy2 02 09 24.606 -10 08 09.31   13.29 12.45 12.24   ~ 226 1
31 [T2015] nest 200506 GrG 02 09 33.8 -10 09 40           ~ 2 0
32 NGC 842 EmG 02 09 50.7902331144 -07 45 44.859522960 14.10 13.61 12.66     ~ 58 1
33 ESO 153-27 Sy2 02 10 31.9927197888 -53 50 12.091458696   14.44   13.04   ~ 29 0
34 MCG-07-05-010 LIN 02 10 54.6303026544 -39 21 57.447788508   13.83   12.32   ~ 40 0
35 [T2015] nest 201282 GrG 02 11 35.6 -39 24 55           ~ 3 0
36 [T2015] nest 200984 GrG 02 11 41.67 -53 45 42.6           ~ 4 0
37 [T2015] nest 200783 GrG 02 13 48.1 -07 33 53           ~ 3 0
38 MCG-01-06-077 EmG 02 14 25.864 -07 22 06.44   14   13.16   ~ 45 1
39 USGC S083 GrG 02 18 49.76 -06 46 40.5           ~ 9 0
40 NGC 883 EmG 02 19 05.1949034256 -06 47 27.533364936   13   11.91   ~ 47 0
41 [T2015] nest 200640 GrG 02 24 21.6 -58 27 57           ~ 3 0
42 ESO 115-8 GiP 02 24 22.7699979528 -58 23 47.771197764   14.65   12.67   ~ 29 0
43 NGC 945 Sy2 02 28 37.3043674032 -10 32 20.689650528   12   11.84   ~ 63 0
44 [T2015] nest 200271 GrG 02 28 54.3 -10 48 48           ~ 3 0
45 ESO 115-15 Bla 02 31 09.2739335616 -57 55 06.051101592   14.41 15.5 12.63   ~ 49 1
46 [LH2011] 3599 GrG 02 31 18.26 -57 58 01.6           ~ 6 0
47 [T2015] nest 200740 GrG 02 33 44.4 -10 52 46           ~ 3 0
48 MCG-02-07-033 EmG 02 34 24.5345738640 -10 50 37.653034488   13.9   12.94 13.5 ~ 71 0
49 IC 242 G 02 38 32.1594778800 -06 54 07.392324960   15   13.53   ~ 20 1
50 [T2015] nest 200685 GrG 02 38 50.4 -11 34 51           ~ 3 0
51 [T2015] nest 201187 GrG 02 39 04.0 -06 52 53           ~ 3 0
52 [T2015] nest 200541 GrG 02 39 48.7 -11 10 43           ~ 2 0
53 IC 247 EmG 02 40 08.7770424552 -11 44 01.618205460   14   13.39   ~ 18 0
54 NGC 1045 Sy2 02 40 29.1212142384 -11 16 39.204299784   13   11.92   ~ 34 0
55 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
56 NGC 1244 GiG 03 06 31.1203817472 -66 46 32.437821036   13.91   12.36   ~ 38 0
57 [T2015] nest 200503 GrG 03 06 58.5 -66 46 09           ~ 3 0
58 NAME Magellanic Bridge HI 03 11 -77.5           ~ 522 1
59 ESO 155-14 GiG 03 17 32.1404481912 -54 21 28.663226856   14.37   12.87   ~ 18 0
60 [T2015] nest 200663 GrG 03 18 26.1 -54 24 12           ~ 2 0
61 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
62 2MASX J04271352-6246502 GiG 04 27 13.5139064736 -62 46 50.254117752           ~ 13 0
63 ESO 202-23 LIN 04 27 59.9876746752 -47 54 45.913916160   13.50 14.90 12.00   ~ 53 0
64 NOGG P2 222 GrG 04 28 18.51 -47 50 13.8           ~ 7 0
65 [T2015] nest 200445 GrG 04 28 28.4 -62 58 01           ~ 3 0
66 ESO 119-48 GiG 05 14 36.0870591816 -61 28 53.437200600   13.60   12.48   ~ 21 0
67 [T2015] nest 200155 GrG 05 17 49.0 -61 36 33           ~ 3 0
68 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
69 NAME Antennae IG 12 01 53.170 -18 52 37.92           ~ 1749 0
70 IC 4214 AG? 13 17 42.6918273984 -32 06 06.103910340   12.15 11.65 10.72 13.84 ~ 121 1
71 NGC 5078 LIN 13 19 50.01126042 -27 24 37.0178091   11.51   10.14 11.1 ~ 122 1
72 NGC 5094 Sy2 13 20 46.8230048208 -14 04 50.105391780   14   12.76   ~ 24 0
73 [T2015] nest 100394 GrG 13 20 57.4 -14 07 13           ~ 3 0
74 ESO 444-18 LIN 13 22 56.8014976152 -32 43 41.997789624   14.47   13.33 12.69 ~ 24 0
75 [T2015] nest 100392 GrG 13 23 36.5 -32 40 53           ~ 3 0
76 [T2015] nest 100391 GrG 13 25 30.6 -19 37 27           ~ 3 0
77 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 500 1
78 [T2015] nest 100074 ClG 13 25 57.4 -29 53 45           ~ 3 0
79 MCG-03-34-077 GiG 13 26 17.0219582304 -19 38 06.985423536   14.30   12.77   ~ 26 0
80 [T2015] nest 100341 GrG 13 37 15.5 -30 56 02           ~ 3 0
81 MCG-05-32-056 Sy1 13 37 57.3985339272 -30 55 53.668133724   14.47   13.28 12.91 ~ 49 0
82 MCG-04-33-035 Sy2 14 03 35.7443724504 -25 25 40.878991344   14.58   12.84 12.85 ~ 23 1
83 [T2015] nest 100179 GrG 14 03 36.8 -25 50 28           ~ 3 0
84 LEDA 715794 G 14 09 01.2831239280 -30 33 32.357547396   14.95   13.81 13.49 ~ 14 0
85 [T2015] nest 101226 GrG 14 09 52.9 -30 27 32           ~ 3 0
86 LEDA 184531 G 14 11 42.4872469584 -30 13 56.785558080   10.88   14.43 13.67 ~ 13 0
87 [T2015] nest 101276 GrG 14 12 03.3 -30 16 26           ~ 2 0
88 [T2015] nest 100753 GrG 14 12 39.0 -28 53 27           ~ 3 0
89 ESO 446-29 G 14 12 56.1331246800 -28 46 26.689646172   14.72   13.24 13.34 ~ 18 0
90 NGC 5626 GiG 14 29 49.1042743440 -29 44 54.721591476   14.01   12.36   ~ 41 0
91 [T2015] nest 100361 GrG 14 30 47.0 -29 48 13           ~ 3 0
92 [T2015] nest 101029 GrG 14 34 04.1 -27 45 53           ~ 3 0
93 IC 4453 Sy2 14 34 28.6580730912 -27 31 06.774174372   13.05   11.56   ~ 33 0
94 [CHM2007] HDC 884 GrG 14 36 50.93 -28 48 34.6           ~ 7 0
95 2MASX J14372770-2843260 GiG 14 37 27.7358293536 -28 43 25.425456816   14.1       ~ 13 0
96 [T2015] nest 201214 GrG 18 52 04.5 -56 43 40           ~ 2 0
97 2MFGC 14640 GiG 18 53 36.9107134200 -56 43 07.983347592           ~ 13 0
98 IC 4797 Sy2 18 56 29.656 -54 18 21.04   12.32 11.27 10.79   ~ 96 0
99 [T2015] nest 200757 GrG 19 02 31.5 -54 03 15           ~ 3 0
100 FRL 505 G 19 03 17.5582451976 -53 12 19.897093944   14.92   13.59   ~ 11 0
101 [T2015] nest 200982 GrG 19 03 18.1 -53 18 51           ~ 3 0
102 ESO 184-5 GiG 19 03 39.3158266992 -53 56 02.880278340   13.65   12.20   ~ 15 0
103 NGC 6753 Sy2 19 11 23.635 -57 02 58.44   11.84 11.04 10.31 11.0 ~ 177 1
104 [T2015] nest 200083 ClG 19 11 59.1 -56 42 32           ~ 3 0
105 [T2015] nest 200765 GrG 19 44 06.5 -55 21 48           ~ 3 0
106 NGC 6812 Bla 19 45 24.22882927 -55 20 48.8362978   13.58   11.91   ~ 63 1
107 [T2015] nest 201283 GrG 20 19 19.1 -53 24 39           ~ 3 0
108 IC 4994 Sy2 20 19 44.4892009896 -53 26 50.572258188   13.92   12.51   ~ 21 0
109 [T2015] nest 201240 GrG 21 49 31.5 -59 12 09           ~ 2 0
110 LEDA 67429 Sy2 21 49 48.8523039192 -59 19 24.281619672   15.40       ~ 15 0
111 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 480 1

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