2009MNRAS.393.1265K

Query : 2009MNRAS.393.1265K

2009MNRAS.393.1265K - Mon. Not. R. Astron. Soc., 393, 1265-1274 (2009/March-2)

The Hubble flow around the Local Group.

KARACHENTSEV I.D., KASHIBADZE O.G., MAKAROV D.I. and TULLY R.B.

Abstract (from CDS):

We use updated data on distances and velocities of galaxies in the proximity of the Local Group (LG) in order to establish properties of the local Hubble flow. For 30 neighbouring galaxies with distances 0.7 < DLG< 3.0 Mpc, the local flow is characterized by the Hubble parameter Hloc= (78±2)km/s/Mpc, the mean-square peculiar velocity σv= 25km/s, corrected for errors of radial velocity measurements (∼4km/s) and distance measurements (∼10km/s), as well as the radius of the zero-velocity surface R0= (0.96±0.03) Mpc. The minimum value for σv is achieved when the barycentre of the LG is located at the distance Dc = (0.55±0.05) DM31 towards Andromeda galaxy (M31) corresponding to the Milky Way (MW)-to-M31 mass ratio MMW/MM31≃ 4/5. In the reference frame of the 30 galaxies at 0.7-3.0 Mpc, the LG barycentre has a small peculiar velocity ∼(24±4)km/s towards the Sculptor constellation. The derived value of R0 corresponds to the total mass MT(LG) = (1.9±0.2) 1012 M☉ with Ωm = 0.24 and a topologically flat universe, a value in good agreement with the sum of virial mass estimates for the MW and M31.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): Local Group - dark matter

Simbad objects: 73

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Number of rows : 73
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-03-01-015 G 00 01 57.9 -15 27 50   11.50 11.10 10.93   ~ 782 2
2 NAME Andromeda XVIII G 00 02 14.5 +45 05 20     16.0     ~ 129 0
3 ESO 349-31 AG? 00 08 13.1536 -34 34 47.836   15.54   14.99   ~ 156 3
4 NGC 55 rG 00 14 53.602 -39 11 47.86 8.54 8.58 7.87 7.84   ~ 828 2
5 ESO 410-5 LSB 00 15 31.21 -32 10 49.9   15.32 14.9 14.58   ~ 120 1
6 IC 10 rG 00 20 17.33520 +59 18 13.6480   13.6 9.5     ~ 1185 1
7 NAME Cetus Dwarf Galaxy G 00 26 10.8 -11 03 14     13.2     ~ 257 0
8 ESO 294-10 AG? 00 26 33.37 -41 51 19.1   15.76 15.3 14.97   ~ 122 2
9 NGC 147 GiG 00 33 12.120 +48 30 31.46   12.0 9.5     ~ 720 1
10 NAME Andromeda III G 00 35 33.8 +36 29 52     14.4     ~ 309 0
11 NGC 185 Sy2 00 38 57.9400026024 +48 20 15.035874648   9.10 9.2     ~ 840 1
12 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
13 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
14 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 355 0
15 NGC 247 LSB 00 47 08.554 -20 45 37.44 10.11 9.61 9.10 8.87   ~ 480 2
16 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
17 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1614 2
18 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1498 4
19 NAME Pisces I G 01 03 55.0 +21 53 06   16.18 14.3     ~ 404 0
20 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1316 2
21 NGC 404 LIN 01 09 27.02 +35 43 05.3   12.56 11.73     ~ 511 0
22 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 215 0
23 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 402 0
24 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
25 NAME Phoenix Dwarf Galaxy Sy1 01 51 06.3 -44 26 41   13.48 13.2 12.69   ~ 575 2
26 NAME IC 342 Group GrG 03 48 42 +68 00.8           ~ 102 1
27 NGC 1569 rG 04 30 49.186 +64 50 52.52 11.72 11.86 11.03     ~ 1297 3
28 UGCA 92 AG? 04 32 03.8366 +63 36 51.243   16.15       ~ 128 0
29 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
30 LEDA 2807061 G 07 00 29.3 -04 12 30           ~ 43 1
31 Z 264-88 AG? 09 16 02.0195908968 +52 50 42.051257412   14.0 13.2     ~ 141 0
32 NAME Leo T G 09 34 53.4 +17 03 05     15.1     ~ 434 0
33 NAME M 81-82 Group GrG 09 55 +69.1           ~ 758 0
34 Z 153-10 G 09 59 26.46 +30 44 47.0 14.08 13.54 13.26 13.33   ~ 652 0
35 Z 36-12 H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 569 0
36 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 825 2
37 NAME Antlia Dwarf Galaxy G 10 04 03.9 -27 20 01 16.73 15.69 15.17 15.00   ~ 221 1
38 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
39 MCG-01-26-030 H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 789 2
40 NAME Sextans dSph LSB 10 13 02.9 -01 36 53   12 10.4     ~ 921 0
41 Z 126-111 G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 899 0
42 NAME Leo V LSB 11 31 09.60 +02 13 12.0     16.0     ~ 234 0
43 NAME Leo IV LSB 11 32 57.0 -00 32 00     15.1     ~ 419 1
44 Z 214-32 AG? 11 50 52.98254 +38 52 50.6594   13.72 13.9 13.39   ~ 175 0
45 IC 3104 AG? 12 18 46.06 -79 43 33.9   13.65 12.8 12.04   ~ 93 1
46 Z 216-4 GiG 12 27 40.90 +43 29 44.0 13.75 13.10 12.7 12.33   ~ 270 0
47 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
48 NAME CVn I Group GrG 12 32 48.3 +33 57 07           ~ 149 0
49 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 287 2
50 Z 71-87 H2G 12 58 40.1930636208 +14 13 00.739589628 15.24 15.16 14.98 14.81   ~ 475 0
51 NAME Cen A Group GrG 13 20 33.9 -44 58 51           ~ 274 0
52 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 352 1
53 Z 271-48 EmG 13 30 44.8682655624 +54 54 38.522749824 14.72 14.25 13.90 13.75   ~ 218 0
54 Z 131-18 EmG 13 39 19.348 +24 46 27.77 15.21 14.84 14.46 14.29   ~ 94 0
55 MCG-06-30-025 EmG 13 49 17.5109711256 -36 03 48.860478360   11.00   10.11   ~ 120 1
56 LEDA 2807150 LSB 13 54 33.356 +04 14 39.66   16.8 17.1     ~ 89 0
57 LEDA 166185 G 14 07 10.1 +35 03 37   16.9 17.2     ~ 94 0
58 Z 133-19 AG? 14 15 57.0834 +23 03 29.871 15.40 14.77 14.41 14.32   ~ 296 0
59 Z 247-26 AG? 14 24 43.21 +44 31 41.8 14.24 13.54 13.17 13.07   ~ 217 0
60 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 594 3
61 LEDA 2801026 LSB 16 13 47.504 +54 22 08.25     15.9     ~ 115 0
62 IC 4662 bCG 17 47 09.192 -64 38 19.25   11.75 11.1 10.45   ~ 253 4
63 NAME Local Void vid 18 38 +18.0           ~ 234 0
64 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2438 2
65 NAME Sgr dIG G 19 29 59.0 -17 40 41   15.5 13.6     ~ 323 1
66 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1661 0
67 MCG-02-53-003 G 20 46 51.7 -12 50 54 15.75 15.18 14.83 14.46   ~ 470 1
68 IC 5152 rG 22 02 41.521 -51 17 47.20   11.03 10.9 10.19   ~ 273 1
69 NAME Tuc Galaxy G 22 41 49.6 -64 25 10   15.7 15.2     ~ 324 0
70 NAME APPLES 1 G 23 15 03.3 -42 32 22           ~ 17 0
71 MCG-05-55-012 G 23 26 27.52 -32 23 19.5 15.34 14.71 14.23 14.03   ~ 163 0
72 LEDA 2807157 GiG 23 45 35.177 +38 43 05.09   16.7 15.2     ~ 93 1
73 NAME Local Group GrG ~ ~           ~ 9325 0

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