Mathematics – Logic
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...348..378o&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 348, Jan. 10, 1990, p. 378-382.
Mathematics
Logic
104
Cosmology, Galactic Clusters, Mach Number, Perturbation Theory, Power Spectra, Relic Radiation, Velocity Distribution
Scientific paper
A new cosmological, self-contained test using the ratio of mean velocity and the velocity dispersion in the mean flow frame of a group of test objects is presented. To allow comparison with linear theory, the velocity field must first be smoothed on a suitable scale. In the context of linear perturbation theory, the Mach number M(R) which measures the ratio of power on scales larger than to scales smaller than the patch size R, is independent of the perturbation amplitude and also of bias. An apparent inconsistency is found for standard values of power-law index n = 1 and cosmological density parameter Omega = 1, when comparing values of M(R) predicted by popular models with tentative available observations. Nonstandard models based on adiabatic perturbations with either negative n or small Omega value also fail, due to creation of unacceptably large microwave background fluctuations.
Ostriker Jeremiah P.
Suto Yasushi
No associations
LandOfFree
The Mach number of the cosmic flow - A critical test for current theories 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 Mach number of the cosmic flow - A critical test for current theories, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Mach number of the cosmic flow - A critical test for current theories will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1560519