Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-09-13
Astrophys.J.635:L113-L116,2005
Astronomy and Astrophysics
Astrophysics
4 pages, 2 figures, version to appear in Astrophysical Journal Letters
Scientific paper
10.1086/499774
Peculiar velocities thoughout the region of the local supercluster are reconstructed by two different orbit-retracing methods. The requirement of the optimal correlation between the radial components of reconstructed velocities and the observed peculiar velocities derived from our extensive new catalog of distances puts stringent constraints on the values of the cosmological parameters. Our constraints intersect those from studies of microwave background fluctuations and statistical properties of galaxy clustering: the ensemble of constraints are consistent with Omega_m=0.22\pm 0.02. While motions throughout the Local Supercluster provide a measure of the mean ratio of mass to light, there can be large local fluctuations. Our reconstruction of the infall velocities in the immediate vicinity of the Virgo Cluster shows that there is a mass-to-light anomaly of a factor of 3 to 6 between groups in the general field environment and the heavily populated Virgo Cluster.
Mohayaee Roya
Tully Brent R.
No associations
LandOfFree
The Cosmological Mean Density and its Local Variations Probed by Peculiar Velocities does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Cosmological Mean Density and its Local Variations Probed by Peculiar Velocities, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Cosmological Mean Density and its Local Variations Probed by Peculiar Velocities will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-704184