Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-06-16
Prog.Theor.Phys.120:581-607,2008
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
30 pages, 7 figures, PTPTeX, references added, accepted for publication in PTP
Scientific paper
10.1143/PTP.120.581
We study spherically symmetric, asymptotically flat black hole solutions in the low-energy effective heterotic string theory, which is the Einstein gravity with Gauss-Bonnet term and the dilaton, in various dimensions. We derive the field equations for suitable ansatz for general D dimensions and construct black hole solutions of various masses numerically in D=4,5,6 and 10 dimensional spacetime with (D-2)-dimensional hypersurface with positive constant curvature. A detailed comparison with the non-dilatonic solutions is made. We also examine the thermodynamic properties of the solutions. It is found that the dilaton has significant effects on the black hole solutions, and we discuss physical consequences.
Guo Zong-Kuan
Ohta Nobuyoshi
Torii Takashi
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