2001A&A...368L..17E

Query : 2001A&A...368L..17E

2001A&A...368L..17E - Astronomy and Astrophysics, volume 368, L17-20 (2001/3-4)

On the quiescence of the Hubble flow in the vicinity of the Local Group. A study using galaxies with distances from the Cepheid PL-relation.

EKHOLM T., BARYSHEV Y., TEERIKORPI P., HANSKI M.O. and PATUREL G.

Abstract (from CDS):

Cepheid distances of local galaxies (<7Mpc) are used to study the very nearby velocity field, as pioneered by Sandage (1986ApJ...307....1S) who also pointed out its remarkable properties: linearity and quietness. The new data show that the velocity dispersion in the distance range as seen from the barycentre of the Local Group 1-8 Mpc is as low as 38km/s. The local rate of expansion coincides with the global Hubble constant. Down to 1.5Mpc we cannot detect a deviation from the linear Hubble flow. This puts an upper limit for the mass of the Local Group, for a wide class of Friedman models, including those with the cosmological constant.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - galaxies: distances and redshifts - galaxies: general - galaxies: kinematics and dynamics - Local Group

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12639 1
2 NGC 300 GiG 00 54 53.4465638304 -37 41 03.168402396 8.83 8.69 8.13 7.46   ~ 1501 2
3 IC 1613 GiC 01 04 48.4071 +02 07 10.185   10.42 10.01 9.77   ~ 1235 2
4 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5834 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17424 0
6 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4446 3
7 NAME Sextans B H2G 10 00 00.8217342072 +05 20 09.533389560 12.77 12.25 11.89 11.71   ~ 528 0
8 NGC 3109 AG? 10 03 06.877 -26 09 34.46 11.10 10.42 10.04 9.91   ~ 769 2
9 NAME Sex A H2G 10 11 00.5 -04 41 30 12.48 12.13 11.93 11.78   ~ 727 2
10 NGC 3621 Sy2 11 18 16.300 -32 48 45.36 10.10 9.44 9.56 8.07 10.1 ~ 590 3
11 IC 4182 BiC 13 05 48.7478324064 +37 36 12.965157684   11.86   11.40   ~ 336 1
12 NGC 5253 AGN 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1365 4
13 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2914 2
14 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1562 0
15 NAME Local Group GrG ~ ~           ~ 8385 0

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