scispace - formally typeset
Search or ask a question
Author

D. Kramer

Bio: D. Kramer is an academic researcher. The author has contributed to research in topics: General relativity & Theory of relativity. The author has an hindex of 1, co-authored 1 publications receiving 1 citations.

Papers
More filters

Cited by
More filters
Journal ArticleDOI
TL;DR: In this article, the authors considered stationary, axially and equatorially symmetric systems consisting of a central rotating and charged degenerate black hole and surrounding matter and showed that a 2 + Q 2 = M 2 always holds provided that a continuous sequence of spacetimes can be identified.
Abstract: We consider stationary, axially and equatorially symmetric systems consisting of a central rotating and charged degenerate black hole and surrounding matter. We show that a 2 + Q 2 = M 2 always holds provided that a continuous sequence of spacetimes can be identified, leading from the Kerr–Newman solution in electrovacuum to the solution in question. The quantity a = J/ M is the black hole’s intrinsic angular momentum per unit mass, Q its electric charge and M is the well-known black hole mass parameter introduced by Christodoulou and Ruffini.

56 citations