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arxiv: 0708.3899 · v1 · pith:HI5YLWZ6new · submitted 2007-08-29 · 🌀 gr-qc

Negative Komar Masses in Regular Stationary Spacetimes

classification 🌀 gr-qc
keywords blackringdischolekomarmatternegativespacetimes
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A highly accurate multi-domain spectral method is used to study axially symmetric and stationary spacetimes containing a black hole or disc of dust surrounded by a ring of matter. It is shown that the matter ring can affect the properties of the central object drastically. In particular, by virtue of the ring's frame dragging, the so-called Komar mass of the black hole or disc can become negative. A continuous transition from such discs to such black holes can be found.

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