期刊
PHYSICAL REVIEW D
卷 85, 期 10, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.85.107501
关键词
-
资金
- Japanese Ministry of Education [21540252]
- Grants-in-Aid for Scientific Research [21540252] Funding Source: KAKEN
We reexamine the light deflection by an Ellis wormhole. The bending angle as a function of the ratio between the impact parameter and the throat radius of the wormhole is obtained in terms of a complete elliptic integral of the first kind. This result immediately yields asymptotic expressions in the weak field approximation. It is shown that an expression for the deflection angle derived (and used) in recent papers is valid at the leading order but it breaks down at the next order because of the nontrivial spacetime topology.
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