Priapism

McCREA, E. D'arcy

doi:10.1016/b978-1-4831-6791-6.50019-3

Cited by 1 publication

(1 citation statement)

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“…In general, however, light propagation is affected by the spacetime curvature, which makes distance measures differ from each other and their counterparts in flat spacetime. This leads to many paradoxical results, such as the finite maximal value of the angular diameter distance in many FLRW Universe models [39][40][41] or absence of any apparent motion of light sources in others [42]. In this section, we will to present and analyze in detail the behaviour of the distance measures in static spherically symmetric spacetimes with the help of the results of the previous sections.…”

Section: Optical Distance Measures and Distance Slip In Schwarzschild...mentioning

confidence: 99%

Bilocal geodesic operators in static spherically-symmetric spacetimes

Serbenta

Korzyński

2022

Class. Quantum Grav.

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We present a method to compute exact expressions for optical observables for static spherically symmetric spacetimes in the framework of the bilocal geodesic operator formalism. The expressions are obtained by solving the linear geodesic deviation equations for null geodesics, using the spacetime symmetries and the associated conserved quantities. We solve the equations in two different ways: by varying the geodesics with respect to their initial data and by directly integrating the equation for the geodesic deviation. The results are very general and can be applied to a variety of spacetime models and configurations of the emitter and the observer. We illustrate some of the aspects with an example of Schwarzschild spacetime, focusing on the behaviour of the angular diameter distance, the parallax distance, and the distance slip between the observer and the emitter outside the photon sphere.

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