Found 11 talks width keyword fundamental parameters

Friday January 16, 2009

Measurement of a large scale flow with clusters of galaxies

University of Salamanca, Spain

Abstract

Peculiar velocities of galaxies, derived using distance estimators, are plagued with systematic effects and are unreliable beyond 100 Mpc/h. In Kashlinsky & Atrio-Barandela (2000) we proposed to measure peculiar velocities of clusters of galaxies using the temperature anisotropies on the Cosmic Microwave Background generated by the hot X-ray emitting. Using this technique we have recently found a bulk flow velocity of amplitude 600-1000 km/s in the same direction as the CMB dipole and encompassing a sphere of 300 Mpc/h radius. We shall discuss the cosmological implications of this measurement.

Archived in: Galaxies, Cosmology - Keywords:distances and redshifts, distance scale, CMB, fundamental parameters, galactic clusters, galactic kinematics

Abstract

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