Macroscopic Entropy of N = 2 Extremal Black Holes
نویسنده
چکیده
Extremal BPS-saturated black holes in N = 2, d = 4 supergravity can carry electric and magnetic charges (q (m), q (e) Λ ). It is shown that in smooth cases the moduli fields at the horizon take a fixed ”rational” value X(q(m), q ) which is determined by the charges and is independent of the asymptotic values of the moduli fields. A universal formula for the Bekenstein-Hawking entropy is derived in terms of the charges and the moduli space Kahler potential evaluated at X(q(m), q ). This work extends previous results of Ferrara, Kallosh and the author for the pure magnetic case. E-mail: [email protected]
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