Gravitational lensing by wormholes
Tushar Kanti Dey, Surajit Sen
TL;DR
This paper compares gravitational lensing effects of two types of wormholes, revealing differences in relativistic image formation due to their distinct photon sphere properties.
Contribution
It provides the first detailed analysis of strong field gravitational lensing by JNW and Ellis wormholes, highlighting their differences in relativistic image production.
Findings
JNW wormhole produces relativistic images.
Ellis wormhole lacks relativistic images.
Differences are due to the presence or absence of photon spheres.
Abstract
We have investigated the gravitational lensing by two wormholes, viz., Janis-Newman-Winnicour (JNW) wormhole and Ellis wormhole. The deflection angle in the strong field limit is calculated and various lens parameters of two wormholes are compared. It is shown that the JNW wormhole exhibits the relativistic images, while the Ellis wormhole does not have any relativistic images due to the absence of its photon sphere.
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