Lagrangian theory of gravitational instability of Friedman-Lemaitre cosmologies -- second-order approach: an improved model for non-linear clustering

Details Lagrangian theory of gravitational instability of Friedman-Lemaitre cosmologies -- second-order approach: an improved model for non-linear clustering Lagrangian theory of gravitational instability of Friedman-Lemaitre cosmologies -- second-order approach: an improved model for non-linear clustering

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.264..375b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 264, 375-387 (1993)

Astronomy and Astrophysics

Astronomy

80

Instabilities - Methods: Analytical - Galaxies: Clustering - Cosmology: Theory - Large-Scale Structure Of Universe

Scientific paper

A large class of solutions for second-order irrotational perturbations is derived in the framework of the Lagrangian theory of gravitational instability of a homogeneous and isotropic universe investigated in earlier papers. The solutions are evaluated in detail for perturbations in a flat background universe. The form of the solutions is designed for use in studies of the formation of large-scale structure from generic initial conditions. Some general remarks on the properties of the solutions are made. The result is illustrated by a special case and discussed. In particular, it is found that sheetlike structures stay compact after shell-crossing (as in the competing `adhesion model'), and that the collapse of first objects occurs earlier (as expected from numerical simulations) in the second-order approach. Both these properties compensate shortcomings of the `Zel'dovich approximation'. In contrast to the `adhesion model', the nth-order Lagrangian perturbation solutions also describe internal structures of self-gravitating pancakes (=2n + 1 stream systems) in terms of the nth orbit crossings within pancakes.

Affiliated with

Also associated with

No associations

Rating

Lagrangian theory of gravitational instability of Friedman-Lemaitre cosmologies -- second-order approach: an improved model for non-linear clustering 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 Lagrangian theory of gravitational instability of Friedman-Lemaitre cosmologies -- second-order approach: an improved model for non-linear clustering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lagrangian theory of gravitational instability of Friedman-Lemaitre cosmologies -- second-order approach: an improved model for non-linear clustering will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1564487