منابع مشابه
Doubly Spinning Black Rings
We study a method to solve stationary axisymmetric vacuum Einstein equations numerically. As an illustration, the five-dimensional doubly spinning black rings that have two independent angular momenta are formulated in a way suitable for fully nonlinear numerical method. Expanding for small second angular velocity, the formulation is solved perturbatively upto second order involving the backrea...
متن کاملSliding Rings and Spinning Holes
We construct smooth supergravity solutions describing a BPS black ring with a BPS black hole centered at an arbitrary distance above the ring. We find that as one moves the black hole the entropy of the ring remains constant, but the angular momentum coming from the supergravity fluxes changes. Our solutions also show that in order to merge a BPS black ring with a BPS black hole one has to incr...
متن کاملSpinning Strings as Small Black Rings
Certain supersymmetric elementary string states with spin can be viewed as small black rings whose horizon has the topology of S 1 × S d−3 in a d-dimensional string theory. By analyzing the singular black ring solution in the supergravity approximation, and using various symmetries of the α ′ corrected effective action we argue that the Bekenstein-Hawking-Wald entropy of the black string soluti...
متن کاملGeodesics and Symmetries of Doubly-Spinning Black Rings
This paper studies various properties of the Pomeransky-Sen’kov doubly-spinning black ring spacetime. I discuss the structure of the ergoregion, and then go on to demonstrate the separability of the HamiltonJacobi equation for null, zero energy geodesics, which exist in the ergoregion. These geodesics are used to construct geometrically motivated coordinates that cover the black hole horizon. F...
متن کاملWavy Horizons?
We describe the application of a gravity wave-generating technique to certain higher dimensional black holes. We find that the induced waves generically destroy the event horizon producing parallelly propagated curvature singularities. Based on a talk presented at the Seventh Canadian Conference on General Relativity and Relativistic Astrophysics in Calgary, AB, Canada, May 31 – June 7, 1997. E...
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ژورنال
عنوان ژورنال: Journal of the Textile Machinery Society of Japan
سال: 1958
ISSN: 0040-5043,1881-1159
DOI: 10.4188/jte1955.4.2_3