On the Noether charge form of the first law of black hole mechanics
نویسنده
چکیده
The first law of black hole mechanics was derived by Wald in a general covariant theory of gravity for stationary variations about a stationary black hole. Although it has many advantages, there are several ambiguous points in the derivation. In this paper we point out them and give a clearer derivation of it. After that, we show that there remains a problem when we consider non-stationary perturbations around a stationary black hole. PACS number(s): 04.70.Dy Typeset using REVTEX 1
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