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Testing the frozen flow approximation
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Melott, Adrian L. Matarrese, Sabino Lucchin, Francesco Moscardini, Lauro |
| Copyright Year | 1993 |
| Description | We investigate the accuracy of the frozen-flow approximation (FFA), recently proposed by Matarrese, et al. (1992), for following the nonlinear evolution of cosmological density fluctuations under gravitational instability. We compare a number of statistics between results of the FFA and n-body simulations, including those used by Melott, Pellman & Shandarin (1993) to test the Zel'dovich approximation. The FFA performs reasonably well in a statistical sense, e.g. in reproducing the counts-in-cell distribution, at small scales, but it does poorly in the crosscorrelation with n-body which means it is generally not moving mass to the right place, especially in models with high small-scale power. |
| File Size | 1129771 |
| Page Count | 19 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950012551 |
| Archival Resource Key | ark:/13960/t8jd9sh55 |
| Language | English |
| Publisher Date | 1993-01-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Perturbation Theory Approximation Galactic Evolution Computerized Simulation Particle Size Distribution Computational Astrophysics Linear Evolution Equations Cross Correlation Big Bang Cosmology Nonlinearity Mathematical Models Particle Density Concentration Many Body Problem Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
