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

Autor:	Cai, Tingqi, Huang, Hyat, Wang, Zun, Zhu, Mian
Rok vydání:	2023
Předmět:	General Relativity and Quantum Cosmology
Druh dokumentu:	Working Paper
Popis:	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. Comment: PRD published version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2302.13704 Zobrazit plný text záznamu View this record from Arxiv