Natural wormholes as gravitational lenses.

  title={Natural wormholes as gravitational lenses.},
  author={Cramer and Forward and Morris and Visser and Benford and Landis},
  journal={Physical review. D, Particles and fields},
  volume={51 6},
  • Cramer, Forward, +3 authors Landis
  • Published 1995
  • Physics, Medicine
  • Physical review. D, Particles and fields
Once quantum mechanical effects are included, the hypotheses underlying the positive mass theorem of classical general relativity fail. As an example of the peculiarities attendant upon this observation, a wormhole mouth embedded in a region of high mass density might accrete mass, giving the other mouth a net [ital negative] mass of unusual gravitational properties. The lensing of such a gravitationally negative anomalous compact halo object (GNACHO) will enhance background stars with a time… Expand

Topics from this paper

A novel gravitational lensing feature by wormholes
Abstract Horizonless compact objects with light rings (or photon spheres) are becoming increasingly popular in recent years for several reasons. In this paper, we show that a horizonless object suchExpand
Strong gravitational lensing by wormholes
We study strong gravitational lensing by a class of static wormhole geometries. Analytical approaches to the same are developed, and the results differ substantially from strong lensing by blackExpand
Gravitational lensing by wormholes
Gravitational lensing by traversable Lorentzian wormholes is a new possibility which is analyzed here in the strong field limit. Wormhole solutions are considered in the Einstein minimally coupledExpand
Gravitational Microlensing by Ellis Wormhole: Second Order Effects
Gravitational lensing is the effect of light bending in a gravitational field. It can be used as a possible observational method to detect or exclude the existence of wormholes. In this work, weExpand
Gravitational lensing by scalar-tensor wormholes and the energy conditions
We study gravitational lensing by a class of zero Ricci scalar wormholes which arise as solutions in a scalar-tensor theory of gravity. An attempt is made to find a possible link between lensingExpand
Traversable wormholes supported by non-exotic matter in general relativity
Abstract Natural horizonless object and its astrophysical signatures have been proposed in various aspects. In this paper, the traversable wormhole solutions are investigated for Einstein’s fieldExpand
Gravitational lensing by wormholes supported by electromagnetic, scalar, and quantum effects
Abstract.Wormholes are one of the most interesting topological features in spacetime, offering a rat run between two vastly separated regions of the universe. In this paper, we study the deflectionExpand
Gravitational lensing by exotic objects
This paper reviews a phenomenological approach to the gravitational lensing by exotic objects such as the Ellis wormhole lens, where exotic lens objects may follow a non-standard form of the equationExpand
Exotic solutions in General Relativity: Traversable wormholes and 'warp drive' spacetimes
The General Theory of Relativity has been an extremely successful theory, with a well established experimental footing, at least for weak gravitational fields. Its predictions range from theExpand
Gravitational lensing of wormholes in the galactic halo region
A recent study by Rahaman et al. has shown that the galactic halo possesses the necessary properties for supporting traversable wormholes, based on two observational results, the Navarro–Frenk–WhiteExpand