Stability of null orbits on photon spheres and photon surfaces
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DOI: 10.1103/physrevd.100.064040
Abstract: Stability of a photon sphere, or stability of circular null geodesics on the sphere, plays a key role in its applications to astrophysics. For instance, an unstable photon sphere is responsible for determining the size… read more here.
Keywords: null geodesics; surface; stability; photon sphere ... See more keywords
Uniqueness of static photon surfaces: Perturbative approach
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.044047
Abstract: A photon surface $S$ is defined as a three-dimensional timelike hypersurface such that any null geodesic initially tangent to $S$ continues to be included in $S$, like $r=3M$ of the Schwarzschild spacetime. Using analytic solutions… read more here.
Keywords: photon; photon surface; uniqueness static; static photon ... See more keywords