2021ApJ...910...56T

Query : 2021ApJ...910...56T

2021ApJ...910...56T - Astrophys. J., 910, 56-56 (2021/March-3)

Mass-velocity dispersion relation in HIFLUGCS Galaxy clusters.

TIAN Y., YU P.-C., LI P., McGAUGH S.S. and KO C.-M.

Abstract (from CDS):

We investigate the mass-velocity dispersion relation (MVDR) in 29 galaxy clusters in the HIghest X-ray FLUx Galaxy Cluster Sample (HIFLUGCS). We measure the spatially resolved, line-of-sight velocity dispersion profiles of these clusters, which we find to be mostly flat at large radii, reminiscent of the rotation curves of galaxies. We discover a tight empirical relation between the baryonic mass Mbar and the flat velocity dispersion σ of the member galaxies, i.e., MVDR, log(Mbar/M☉)=4.1–0.4+0.4log(σ/kms–1)+1.6–1.3+1.0, with the lognormal intrinsic scatter of 12–3+3 % . The residuals of the MVDR are uncorrelated with other cluster properties like temperature, cluster radius, baryonic mass surface density, and redshift. These characteristics are reminiscent of the MVDR for individual galaxies, albeit at about a ten times larger characteristic acceleration scale. The cluster baryon fraction falls short of the cosmic value, exposing a problem: the discrepancy increases systematically for clusters of lower mass and lower baryonic acceleration.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Dark matter - Galaxy clusters - Galaxy groups - Intracluster medium - X-ray 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 ACO 85 ClG 00 41 36.21 -09 19 30.4           ~ 974 0
2 MCG-02-02-086 rG 00 41 50.45002 -09 18 11.4633   14 13.52 12.94   ~ 154 1
3 NAME M31 Group GrG 00 47 28.6 +40 17 23           ~ 65 0
4 ACO 119 ClG 00 56 08.57 -01 12 00.8           ~ 577 2
5 Z 384-34 BiC 00 56 16.101 -01 15 19.77   14.40 14.45     ~ 82 1
6 MCG-04-03-044 rG 01 02 41.43 -21 52 41.8   14.54 15.1 12.94   ~ 77 3
7 ACO 133 ClG 01 02 41.5 -21 52 53           ~ 391 1
8 NGC 708 rG 01 52 46.482 +36 09 06.53 14.85 14.27 13.29 12.67 12.09 ~ 259 3
9 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 727 1
10 NGC 1399 rG 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1636 1
11 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
12 LEDA 13641 BiC 03 42 52.9677368568 -53 37 52.547974500   16.15       ~ 25 1
13 ACO 3158 ClG 03 43 07.5 -53 38 09           ~ 327 0
14 2MASXI J0431133-612712 BiC 04 31 13.2952313064 -61 27 12.013455636   15.30   13.60   ~ 30 1
15 ACO 3266 ClG 04 31 26.4 -61 25 17           ~ 447 0
16 MCG-02-12-039 rG 04 33 37.8465077496 -13 15 42.989961204   13.95 14.22     ~ 104 2
17 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
18 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 222 1
19 LEDA 19044 rG 06 26 20.45020 -53 41 35.8370           ~ 15 0
20 ACO 576 ClG 07 21 24.1 +55 44 20           ~ 312 1
21 Z 261-56 BiC 07 21 30.2748806208 +55 45 41.806138500   15.62       ~ 27 1
22 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 905 1
23 NGC 3311 EmG 10 36 42.821 -27 31 42.02   11.93 10.93 10.00 9.67 ~ 310 2
24 NAME NGC 4636 Group GrG 12 42 49.5 +02 41 08           ~ 570 0
25 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
26 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
27 NGC 4696 rG 12 48 49.2724775784 -41 18 39.304053252   11.21   10.7   ~ 510 3
28 2MASX J12571157-1724344 LIN 12 57 11.580 -17 24 34.47   13.50   12.56   ~ 62 2
29 ACO 1644 ClG 12 57 11.6 -17 24 34           ~ 391 1
30 MCG-05-32-026 rG 13 27 56.884 -31 29 43.71   13.88 15 12.24 12.76 ~ 88 2
31 ACO 3558 ClG 13 28 03.2 -31 31 35           ~ 476 2
32 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 337 1
33 ESO 444-72 BiC 13 33 34.739 -31 40 20.16   14.40   12.83 13.42 ~ 53 0
34 2MASX J13472255+2622519 BiC 13 47 22.5713065824 +26 22 51.738047832           ~ 11 0
35 MCG-05-33-002 rG 13 47 28.385 -32 51 54.02   13.02   11.53 12.50 ~ 67 1
36 ACO 3571 ClG 13 47 32.4 -32 50 12           ~ 308 2
37 ACO 1795 ClG 13 48 47.4 +26 34 55           ~ 1330 0
38 IC 4374 Bla 14 07 29.76229070 -27 01 04.2916695   13.61   11.79 12.55 ~ 142 3
39 ACO 3581 ClG 14 07 29.8 -27 01 04           ~ 197 3
40 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
41 IC 1101 rG 15 10 56.100 +05 44 41.19   15.10       ~ 165 2
42 ACO 2052 ClG 15 16 41.64 +07 01 45.5           ~ 756 1
43 Z 49-90 Sy2 15 16 44.4893939136 +07 01 17.825410740   15.19 14.17     ~ 463 4
44 ACO 2063 ClG 15 23 01.8 +08 38 22           ~ 414 2
45 Z 77-97 rG 15 23 05.2995518184 +08 36 33.193663020   14.71       ~ 72 2
46 2MASX J15582002+2714000 BiC 15 58 20.000 +27 14 00.28   14.48       ~ 40 1
47 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
48 ACO 2147 ClG 16 02 11.96 +15 55 11.5           ~ 416 0
49 Z 108-73 rG 16 02 17.0257413888 +15 58 28.670337876   14.9       ~ 95 0
50 ACO 2199 ClG 16 28 34.5 +39 32 26           ~ 1206 1
51 NGC 7647 BiC 23 23 57.4310112528 +16 46 38.141670936   14.61 14.45     ~ 79 0
52 ACO 2589 ClG 23 24 00.5 +16 49 29           ~ 327 1
53 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 515 2
54 NGC 7728 rG 23 40 00.83890 +27 08 01.3730   14.3       ~ 113 1
55 ACO 2657 ClG 23 44 51.0 +09 08 40           ~ 280 3
56 Z 407-53 BiC 23 44 57.4174372704 +09 11 35.283893712   15.6       ~ 36 0
57 ACO 4038 ClG 23 47 31.1 -28 12 10           ~ 349 3
58 IC 5358 rG 23 47 45.1086508608 -28 08 26.650470372   13.42 14.72 11.99   ~ 88 1
59 [LPS2014] 359.2515-34.7590 BiC 23 57 00.4 -34 45 32           ~ 2 0
60 ACO 4059 ClG 23 57 02.2 -34 45 58           ~ 400 1
61 NAME A2199 Supercluster SCG ~ ~           ~ 18 0

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