Possible existence of wormholes in the galactic halo region

Rahaman, Farook; Kuhfittig, Peter K. F.; Ray, Saibal; Islam, Nurul

doi:10.1140/epjc/s10052-014-2750-5

Cited by 144 publications

(97 citation statements)

References 24 publications

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“…It has been suggested quite recently that the galactic halo possesses some of the characteristics needed to support traversable wormholes [1]. For such wormholes the detection by means of gravitational lensing becomes a distinct possibility, especially when viewed from a strong-field perspective.…”

Section: Introductionmentioning

confidence: 99%

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Gravitational lensing of wormholes in the galactic halo region

Kuhfittig

2014

Eur. Phys. J. C

160

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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-White density profile and the observed flat rotation curves of galaxies. Using a method for calculating the deflection angle pioneered by V. Bozza, it is shown that the deflection angle diverges at the throat of the wormhole. The resulting photon sphere has a radius of about 0.40 ly. Given the dark-matter background, detection may be possible from past data using ordinary light.

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Section: Introductionmentioning

confidence: 99%

“…Equation (1) resulted from N -body simulations in the search for the structure of dark halos in the standard CDM cosmology.…”

Section: Introductionmentioning

confidence: 99%

Gravitational lensing of wormholes in the galactic halo region

Kuhfittig

2014

Eur. Phys. J. C

160

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“…The energy density may also be known for physical reasons, as in the case of the Navarro-Frenk-White density profile for dark matter [6,7] …”

Section: Introductionmentioning

confidence: 99%

Wormholes admitting conformal Killing vectors and supported by generalized Chaplygin gas

Kuhfittig

2015

Eur. Phys. J. C

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When Morris and Thorne first proposed that traversable wormholes may be actual physical objects, they concentrated on the geometry by specifying the shape and redshift functions. This mathematical approach necessarily raises questions regarding the determination of the required stress-energy tensor. This paper discusses a natural way to obtain a complete wormhole solution by assuming that the wormhole (1) is supported by generalized Chaplygin gas and (2) admits conformal Killing vectors.

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“…[22] that the Navarro-Frenk-White model can be used to show that dark matter can support traversable wormholes provided that we confine ourselves to the outer regions of the galactic halo. This restriction does not apply to the present study.…”

Section: The Shadow Universementioning

confidence: 99%

Conformal-symmetry Wormholes Supported by a Perfect Fluid

Kuhfittig¹

2017

NHMP

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This paper presents a new wormhole solution by assuming that a homogeneously distributed fluid with equation of state p = ωρ can be adapted to an anisotropic spacetime such as a wormhole and that this spacetime admits a one-parameter group of conformal motions. The pressure p in the equation of state becomes the lateral pressure pt instead of the radial pressure pr, as assumed in previous studies. Given that pt = ωρ, pr is then determined from the Einstein field equations. A wormhole solution can be obtained only if ω < −1 or 0 < ω < 1. Since the former case corresponds to phantom dark energy, which has been the subject of earlier studies, we concentrate mainly on the latter. This case implies that given the above conditions, dark matter can support traversable wormholes.

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Possible existence of wormholes in the galactic halo region

Cited by 144 publications

References 24 publications

Gravitational lensing of wormholes in the galactic halo region

Gravitational lensing of wormholes in the galactic halo region

Wormholes admitting conformal Killing vectors and supported by generalized Chaplygin gas

Conformal-symmetry Wormholes Supported by a Perfect Fluid

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