Shadow images of Kerr-like wormholes

Abstract

The study of shadow continues to be a major source of insight into compact astrophysical objects. Depending on the nature of compact objects and due to the strong gravitational lensing effect that casts a shadow on the bright background. We consider the Kerr-like wormholes spacetime [1] which is a modification of Kerr black holes that turns into the wormholes for nonzero values of deformation parameter λ 2 . The results suggest that the Kerr spacetime can reproduce far away from the throat of the wormhole. We obtain the shapes of the shadow for the Kerr-like wormholes and discuss the effect of spin a and deformation parameter λ 2 on the size of the shadow. As a consequence, it is discovered that the shadow is distorted due to the rotation and that the radius of the shadow monotonically increases with λ 2 .

Can we distinguish black holes from naked singularities by the images of their accretion disks?

“…This issue of whether a shadow implies an event horizon has also been addressed in [5,6]. Also, see [7][8][9][10][11][12][13][14][15][16][17][18][19][20] for some works on shadow cast by various horizonless objects.…”

Black hole shadow in a general rotating spacetime obtained through Newman-Janis algorithm

“…Some recent studies, however, suggest that the presence of a shadow does not by itself prove that a compact object is necessarily a black hole. Other horizonless compact objects, which posses light rings around them, can also cast shadows [73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][88].…”

Wormholes with nonexotic matter in Born-Infeld gravity

“…See [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] and references therein for some such examples. Also see [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] for some recent works on different aspects of wormholes.…”