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Global Lorentzian geometry from lightlike geodesics: What does an observer in (2+1)-gravity see?
lightlike geodesics (2+1)-gravity
2010/3/19
We show how an observer could measure the non-local holonomy variables that parametrise the flat Lorentzian 3d manifolds arising as spacetimes in (2+1)-gravity. We consider an observer who emits light...
ON THE GEODESICS FOR SPHERICALLY SYMMETRIC DILATON BLACK HOLE
SPHERICALLY SYMMETRIC DILATON BLACK HOLE
2009/3/26
In this paper we shall investigate the timelike geodesics for an
extremal, spherically symmetric, massless dilaton black hole, using an exact solution
obtained by Gary Horowitz.