Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ap.....45..380s&link_type=abstract
Astrophysics (English translation of Astrofizika), v. 45, Issue 3, p. 380-391 (2002).
Astronomy and Astrophysics
Astrophysics
Cosmology Theory - Cosmology Evolution - Cosmology Gravity
Scientific paper
Cosmological evolution is investigated within the framework of low-energy string gravitation with higher-loop corrections to the dilaton coupling functions in the presence of a dilaton potential and a nongravitational source. It is shown that for homogeneous and isotropic models with a flat space, the cosmological system of equations reduces to an autonomous, third-order, dynamical system. Subclasses of models with a constant dilaton, which provide the basis for various cosmological mechanisms of dilaton stabilization, are considered. A class of solutions is distinguished with asymptotic scaling behavior of the energy density of the dilaton field.
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