2000AJ....119..609V

Query : 2000AJ....119..609V

2000AJ....119..609V - Astron. J., 119, 609-611 (2000/February-0)

The mass of the Centaurus A group of galaxies.

VAN DEN BERGH S.

Abstract (from CDS):

The mass M and the radius Rh of the Centaurus A group are estimated from the positions and radial velocities of 30 probable cluster members. For an assumed distance of 3.9 Mpc, it is found that Rh∼640 kpc. The velocity dispersion in the Cen A group is 114±21 km.s–1. From this value and Rh=640 kpc, the virial theorem yields a total mass of 1.4x1013 M☉ for the Cen A group. The projected mass method gives a mass of 1.8x1013 M☉. These values suggest that the Cen A group is about 7 times as massive as the Local Group. The Cen A mass-to-light ratio is found to be M/LB=155-200 (M/L)☉. The cluster has a zero-velocity radius R0=2.3 Mpc.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Clusters: Individual: Name: Centaurus A

CDS comments: T.1 : galaxies HHMM-DD are [K99b]

Simbad objects: 34

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Number of rows : 34
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 ESO 321-14 AG? 12 13 48.8792 -38 14 00.250 16.32 15.70 15.35 15.20 15.2 ~ 92 0
2 ESO 381-18 EmG 12 44 42.39 -35 58 00.2   15.79   14.84 15.1 ~ 59 0
3 MCG-06-28-017 AG? 12 46 00.67 -33 50 13.0   14.24   13.50 14.0 ~ 91 0
4 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1582 2
5 ESO 269-58 AG? 13 10 32.8047 -46 59 37.747   12.50   11.31   ~ 76 0
6 NGC 5068 AG? 13 18 54.807 -21 02 20.76 11.24 10.53 10.01 9.78 10.1 ~ 354 0
7 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 274 0
8 LEDA 166163 G 13 21 08.5 -31 31 50   17.4       ~ 59 0
9 NGC 5102 EmG 13 21 57.6100832352 -36 37 48.395156160   9.74 9.65 8.47 10.2 ~ 389 1
10 LEDA 166164 G 13 22 56.2 -33 34 22   17.6       ~ 27 0
11 LEDA 46885 GiC 13 24 36.23 -30 58 18.5   16.67   17.33   ~ 61 1
12 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
13 IC 4247 EmG 13 26 44.43 -30 21 44.7 15.34 14.67 14.28 14.13 14.53 ~ 99 0
14 ESO 324-24 LSB 13 27 37.6117 -41 28 44.128   12.91   12.13 12.3 ~ 107 0
15 HIPASS J1328-30 G 13 28 26 -30 26.5           ~ 7 0
16 ESO 174-1 AG? 13 33 19.6893963648 -53 21 16.879051620   14.1       ~ 40 0
17 NGC 5206 GiG 13 33 43.9615937880 -48 09 03.953598228   11.62   10.40   ~ 121 0
18 MCG-07-28-004 AG? 13 34 47.30 -45 32 51.0   11.69 11.40 10.03 11.2 ~ 85 0
19 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2778 2
20 LEDA 592761 G 13 37 25.2 -39 53 52   16.1   16.3 16.5 ~ 47 0
21 NGC 5237 EmG 13 37 39.056 -42 50 48.90   13.26 12.67 12.34   ~ 116 1
22 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
23 NGC 5264 GiG 13 41 36.683 -29 54 47.25 13.86 12.96 12.39 12.14 15.83 ~ 164 1
24 ESO 325-11 AG? 13 45 01.0528 -41 51 45.993   14.02   13.49 12.9 ~ 113 0
25 ESO 174-1B G 13 47 58.088 -53 20 51.23   14.4   14.2 13.9 ~ 34 1
26 LEDA 4614882 AG? 13 48 33.9801 -37 58 03.811           ~ 37 0
27 MCG-06-30-025 EmG 13 49 17.5109711256 -36 03 48.860478360   11.00   10.11   ~ 120 1
28 LEDA 3097113 G 13 51 18.9 -46 58 25           ~ 36 0
29 NGC 5408 EmG 14 03 20.907 -41 22 39.75   12.59   11.96 12.2 ~ 368 3
30 LEDA 51659 G 14 28 03.7 -46 18 06   15       ~ 73 1
31 ESO 222-10 AG? 14 35 02.58 -49 25 14.3   14.8   14.6 14.7 ~ 36 0
32 ESO 272-25 AG? 14 43 25.52 -44 42 18.9   14.79   14.00 13.8 ~ 40 0
33 ESO 274-1 G 15 14 13.429 -46 48 33.12   12.00   10.97 11.3 ~ 118 0
34 NAME Local Group GrG ~ ~           ~ 9325 0

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