2023/02/27 by Tingqi Cai, Cai, Tingqi, Hyat Huang +5 · 1 citation
Mathematics · Physics and Astronomy · #Adaptive optics and wavefront sensing #Applied mathematics #Astrophysical Phenomena and Observations #Astrophysics #Classical mechanics #Deflection (physics) #FOS: Physical sciences #Formalism (music) #Galaxy #General Relativity and Quantum Cosmology (gr-qc) #Geometry #Mathematics #Orders of approximation #Physics #Pulsars and Gravitational Waves Research #Redshift #Rotation formalisms in three dimensions #Theoretical physics #Weak gravitational lensing #Wormhole
paper · pdf · doi:10.48550/arxiv.2302.13704
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2023/02/27 · openalex created_date 2023/03/03 · openalex updated_date 2026/07/28
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/b4 order. We use different approximation formalisms, study their precision at 1/b4 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.