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arXiv · 2302.13704

Higher-order correction to weak-field lensing of an Ellis-Bronnikov wormhole

Tingqi Cai·Hyat Huang·Zun Wang·Mian Zhu
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Abstract

The gravitational lensing effect at higher order under weak-field approximation is believed to be important to distinguish black holes and other compact objects such as wormholes. The deflection angle of a generic wormhole is difficult to solve analytically; thus approximation methods are implemented. In this paper, we investigate the weak-field deflection angle of a specific wormhole, the Ellis-Bronnikov wormhole, up to the 1/b^4 order. We use different approximation formalisms, study their precision at 1/b^4 order by a comparison to a purely numerical result, and finally rank these formalisms by their accuracy. Moreover, we find that certain formalisms are sensitive to the choice of coordinate system; thus it is important to choose the coordinate system appropriately for the evaluating of lensing physics.

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Tingqi Cai, Hyat Huang, Zun Wang, Mian Zhu. 2023-08-01. Higher-order correction to weak-field lensing of an Ellis-Bronnikov wormhole. https://arxiv.org/abs/2302.13704

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