Validity and Application of the Extended Lagrangian Perturbation Theory

Details Validity and Application of the Extended Lagrangian Perturbation Theory Validity and Application of the Extended Lagrangian Perturbation Theory

Sep 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005tsra.conf..349t&link_type=abstract

Proceedings of the 22nd Texas Symposium on Relativistic Astrophysics at Stanford, Stanford California, December 13-17, 2004. Ed

Astronomy and Astrophysics

Astrophysics

Scientific paper

Basing our discussion on the Lagrangian description of hydrodynamics, we studied the evolution of density fluctuation for nonlinear cosmological dynamics. We solved hydrodynamic equations for a self-gravitating fluid with pressure, given by a polytropic equation of state, using a perturbation method. In this conference, we discuss validity of these perturbative solutions and application for structure formation in the Universe. Especially we will notice the correspondence between past modified Lagrangian perturbation models and our model.

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