SIMBAD references

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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