Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2005-04-20
Gen.Rel.Grav. 38 (2006) 345-364
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
latex file, including 11 figures, to appear in Gen. Relativ. Grav
Scientific paper
10.1007/s10714-005-0224-7
Asymptotics of solutions of a perfect fluid when coupled with a cosmological constant in four-dimensional spacetime with toroidal symmetry are studied. In particular, it is found that the problem of self-similar solutions of the first kind for a fluid with the equation of state, $p = k \rho$, can be reduced to solving a master equation of the form, $$ 2 F(q, k)\frac{q''(\xi)}{q'(\xi)} - G(q,k) q'(\xi) = \frac{4}{\xi}. $$ For $k = 0$ and $k = -1/3$ the general solutions are obtained and their main local and global properties are studied in detail.
Benesh Gregory A.
Wang Anzhong
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