Charged perfect fluid configurations with a dilaton field

Details Charged perfect fluid configurations with a dilaton field Charged perfect fluid configurations with a dilaton field

2004-11-28

arxiv.org/abs/gr-qc/0411132v2

Mod.Phys.Lett.A20:821-831,2005

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages, LaTex, v2 typos corrected

Scientific paper

10.1142/S0217732305017056

We examine static charged perfect fluid configurations in the presence of a dilaton field. A method for construction of interior solutions is given. An explicit example of an interior solution which matches continuously the external Gibbons-Maeda-Garfinkle-Horowitz-Strominger solution is presented. Extremely charged perfect fluid configurations with a dilaton are also examined. We show that there are two types of extreme configurations. For each type the field equations are reduced to a single nonlinear equation on a space of a constant curvature. In the particular case of a perfect fluid with a linear equation of state, the field equations of the first type configurations are reduced to a Helmlotz equation on a space with a constant curvature. An explicit example of an extreme configuration is given and discussed.

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