Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...450...83r&link_type=abstract
Astronomy and Astrophysics, Volume 450, Issue 1, April IV 2006, pp.83-86
Astronomy and Astrophysics
Astrophysics
Scientific paper
Context: .To investigate peculiar large scale motions under a diffusive-stochastic fluid description. Aims: .Our basic aims are to find the profile of the pairwise galaxy velocity distribution using the dynamical fluid equation and to constrain the profile with current observational data. Methods: .We rewrite the fluid equation for the galaxy fluid using a coarse-grained approach. Then, we solve the equation to find the theoretical velocity probability distribution. Next, we study the mode correlations in the Fourier space and find the profile to be compared with current observational data. Results: .The theoretical profile for the mode correlations is a Lorentzian, which is in good agreement with data. Also, our model allowed us to constrain, for the first time, the viscosity parameter of the cosmic fluid as ~3.35 Mpc^2 Gyr-1. Conclusions: .We find evidence that galaxy peculiar motions can be described as a fluid under a linear diffusive-stochastic regime at scales larger than ~5~h-1 Mpc.
Falcão M. A.
Ribeiro André L. B.
No associations
LandOfFree
Galaxy peculiar motions under a diffusive-stochastic regime 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 Galaxy peculiar motions under a diffusive-stochastic regime, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galaxy peculiar motions under a diffusive-stochastic regime will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1156397