Kerr black hole gravitational lensing in the strong deflection limit: an analytical approach

Details Kerr black hole gravitational lensing in the strong deflection limit: an analytical approach Kerr black hole gravitational lensing in the strong deflection limit: an analytical approach

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007waas.work..151d&link_type=abstract

"1st Workshop of Astronomy and Astrophysics for Students" held in Naples (ITALY) on April 19-20, 2006. Published by INFN-Naples,

Astronomy and Astrophysics

Astrophysics

Scientific paper

The caustics, critical curves and Kerr black hole shadow structure are derived from the lens equations solved by means of a perturbative approach and assuming large deflections. Starting from the Schwarzschild lens we will add terms up to the second order in the lens spin. We will focus on the degeneracy, arising at this order of approximation, between the lens angular momentum and the height of the observer on the equatorial plane that cannot be disentangled, no matter which observable is measured. Some applications of the results will be described.

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