Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1997-06-13
Phys.Rev.D56:7792-7796,1997
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
Minor changes have been made; the references have been updated and some added; 11 pages. To appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.56.7792
The symmetries of generic 2D dilaton models of gravity with (and without) matter are studied in some detail. It is shown that $\delta_2$, one of the symmetries of the matterless models, can be generalized to the case where matter fields of any kind are present. The general (classical) solution for some of these models, in particular those coupled to chiral matter, which generalizes the Vaidya solution of Einstein Gravity, is also given.
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