Vacuum spacetimes with toroidal null infinities
نویسنده
چکیده
It is shown that some known solutions of Einstein’s vacuum field equations admit null infinities such that the sections of the null hypersurface at infinity are toroidal. PACS numbers: 0420G, 0420H, 0430
منابع مشابه
Numerical Calculation of Conformally Smooth Hyperboloidal Data
This is the third paper in a series describing a numerical implementation of the conformal Einstein equation. This paper describes a scheme to calculate (three) dimensional data for the conformal field equations from a set of free functions. The actual implementation depends on the topology of the spacetime. We discuss the implementation and exemplary calculations for data leading to spacetimes...
متن کاملAsymptotic Behavior of Geodesics in Gowdy Spacetimes
Recent work by the authors led to the development of a mathematical theory dealing with 'second– order hyperbolic Fuchsian systems', as we call them. In the present paper, we adopt a physical standpoint and discuss the implications of this theory which provides one with a new tool to tackle the Einstein equations of general relativity (under certain symmetry assumptions). Specifically, we formu...
متن کاملLodged in the throat: Internal infinities and AdS/CFT
In the context of AdS3/CFT2, we address spacetimes with a certain sort of internal infinity as typified by the extreme BTZ black hole. The internal infinity is a null circle lying at the end of the black hole’s infinite throat. We argue that such spacetimes may be described by a product CFT of the form CFTL⊗CFTR, where CFTR is associated with the asymptotically AdS boundary while CFTL is associ...
متن کاملType D Einstein spacetimes in higher dimensions
We show that all static spacetimes in higher dimensions n > 4 are necessarily of Weyl types G, Ii, D or O. This applies also to stationary spacetimes provided additional conditions are fulfilled, as for most known black hole/ring solutions. (The conclusions change when the Killing generator becomes null, such as at Killing horizons, on which we briefly comment.) Next we demonstrate that the sam...
متن کاملPurely Magnetic Spacetimes
Spacetimes in which the electric part of the Weyl tensor vanishes (relative to some timelike unit vector field) are said to be purely magnetic. Examples of purely magnetic spacetimes are known and are relatively easy to construct, if no restrictions are placed on the energy-momentum tensor. However it has long been conjectured that purely magnetic vacuum spacetimes (with or without a cosmologic...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1996