Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...415l...5g&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 415, no. 1, p. L5-L8.
Astronomy and Astrophysics
Astrophysics
21
Dark Matter, Normal Density Functions, Perturbation Theory, Universe, Strange Attractors, Velocity Distribution
Scientific paper
The method of constrained realization (CR) of Gaussian random fields is applied to reconstruct our 'local' universe. A large observational data set is sampled and used as constraints imposed on realizations of an assumed primordial Gaussian perturbation field. To illustrate the method, the velocity potential as obtained by the POTENT algorithm from the observed velocity field is sampled at 181 different positions within a sphere of 40/h Mpc radius around us. Numerical realizations of the standard cold dark matter (CDM) model are constructed to yield the actual sampled values. These realizations do reconstruct the density perturbation field of the nearby universe. With only 181 constraints, the CR algorithm recovers the main features of POTENT's density field and, in particular, the Great Attractor region. The 12/h Mpc smoothed potential, which depends on the very long wavelengths of the underlying perturbation field, is used to constrain high-resolution (5/h Mpc smoothing) realizations. Thus, given an assumed model, high-resolution fields are created subject to low-resolution data. The method is easily applicable to the general case where any variable which depends linearly on the Gaussian field can be used to set the constraints.
Ganon Galit
Hoffman Yehuda
No associations
LandOfFree
Constrained realizations of Gaussian fields - Reconstruction of the large-scale structure 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 Constrained realizations of Gaussian fields - Reconstruction of the large-scale structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constrained realizations of Gaussian fields - Reconstruction of the large-scale structure will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1561062