Tidal forces in cold black hole spacetimes. (English) Zbl 1155.83348
Summary: We investigate here the behavior of a few spherically symmetric static acclaimed black hole solutions in respect of tidal forces in the geodesic frame. It turns out that the forces diverge on the horizon of cold black holes (CBH) while for ordinary ones, they do not. It is pointed out that Kruskal-like extensions do not render the CBH metrics nonsingular. We present a CBH that is available in the Brans-Dicke theory for which the tidal forces do not diverge on the horizon and in that sense it is a better one.
MSC:
| 83C57 | Black holes |
| 83D05 | Relativistic gravitational theories other than Einstein’s, including asymmetric field theories |
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