Einstein rings as a tool for estimating distances and the mass of a Schwarzschild black hole

Details Einstein rings as a tool for estimating distances and the mass of a Schwarzschild black hole Einstein rings as a tool for estimating distances and the mass of a Schwarzschild black hole

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phrvd..77l4042m&link_type=abstract

Physical Review D, vol. 77, Issue 12, id. 124042

Physics

2

Classical General Relativity, Exact Solutions, Canonical Formalism, Lagrangians, And Variational Principles

Scientific paper

The bending of light due to the curvature of spacetime close to a black hole is so strong that light can even return to the point of emittance yielding an Einstein ring. Using the analytic solution of the geodesic equation in Schwarzschild spacetime and a distant star or a flash of light, we will be able to determine the mass of a black hole as well as the distance of the observer to this black hole, at least in principle.

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