Slices of the Kerr ergosurface
General Relativity and Quantum Cosmology
2009-02-20 v2 Astrophysics
High Energy Physics - Theory
Mathematical Physics
Differential Geometry
math.MP
Abstract
The intrinsic geometry of the Kerr ergosurface on constant Boyer-Lindquist (BL), Kerr, and Doran time slices is characterized. Unlike the BL slice, which had been previously studied, the other slices (i) do not have conical singularities at the poles (except the Doran slice in the extremal limit), (ii) have finite polar circumference in the extremal limit, and (iii) for sufficiently large spin parameter fail to be isometrically embeddable as a surface of revolution above some latitude. The Doran slice develops an embeddable polar cap for spin parameters greater than about 0.96.
Cite
@article{arxiv.0809.2369,
title = {Slices of the Kerr ergosurface},
author = {Ted Jacobson and Yee-Ann Soong},
journal= {arXiv preprint arXiv:0809.2369},
year = {2009}
}
Comments
13 pages, 6 figures; v.2: minor editing for clarification, references added, typos fixed, version published in Classical and Quantum Gravity