Analytical approach to strong gravitational lensing from ultracompact objects
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.99.104040
Abstract: Strong gravitational lensing from black holes results in the formation of relativistic images, in particular, relativistic Einstein rings. For objects with event horizons, the radius of the unstable light ring (photon sphere) is the lowest… read more here.
Keywords: gravitational lensing; ultracompact objects; analytical approach; lensing ultracompact ... See more keywords
Light-Ring Stability for Ultracompact Objects.
Sign Up to like & getrecommendations! Published in 2017 at "Physical review letters"
DOI: 10.1103/physrevlett.119.251102
Abstract: We prove the following theorem: axisymmetric, stationary solutions of the Einstein field equations formed from classical gravitational collapse of matter obeying the null energy condition, that are everywhere smooth and ultracompact (i.e., they have a… read more here.
Keywords: stability ultracompact; light rings; ultracompact objects; energy ... See more keywords
Exotic Compact Objects and the Fate of the Light-Ring Instability.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.130.061401
Abstract: Ultracompact objects with light rings (LRs) but without an event horizon could mimic black holes (BHs) in their strong gravity phenomenology. But are such objects dynamically viable? Stationary and axisymmetric ultracompact objects that can form… read more here.
Keywords: exotic compact; objects fate; instability; fate light ... See more keywords