Unusual radio source MG1131+0456: a possible Einstein ring

Hewitt, J. N.; Turner, Edwin L.; Schneider, Donald P.; Burke, B. F.; Langston, G. I.; Lawrence, C. R.

doi:10.1038/333537a0

Cited by 149 publications

(91 citation statements)

References 10 publications

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“…external Schwarzschild space-time. Finally, for case (2), we have considered two known lens systems, MG 1654 + 134 [37], and MG 1131 + 0456 [38]. For these two systems, M/D d is taken as ∼ 4.8 × 10 −12 and ∼ 1.32 × 10 −11 respectively.…”

Section: Ifmentioning

confidence: 99%

Astrophysics of Bertrand space-times

2013

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We construct a model for galactic dark matter that arises as a solution of Einstein gravity, and is a Bertrand space-time matched with an external Schwarzschild metric. This model can explain galactic rotation curves. Further, we study gravitational lensing in these space-times, and in particular we consider Einstein rings, using the strong lensing formalism of Virbhadra and Ellis. Our results are in good agreement with observational data, and indicate that under certain conditions, gravitational lensing effects from galactic dark matter may be similar to that from Schwarzschild

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Section: Ifmentioning

confidence: 99%

Astrophysics of Bertrand space-times

2013

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“…Radio rings, formed out of multiply imaged radio lobes and jets, have been known for more than a decade (Hewitt et al 1988 ;Langston et al 1990 ;et al 1993). But more recently, Lehar QSO lenses, when deeply imagedÈespecially in the infraredÈhave shown rings formed out of multiply imaged parts of the QSO host galaxy : Falco, & Shapiro Lehar, (1997) examined Hubble Space T elescope images of MG 0414]0534 and found an arc connecting three of the four QSO images ; Courbin et al (1997) found an incipient ring in 1115]080 ; Impey et al (1998) uncovered the full ring.…”

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confidence: 99%

Beware the Nonuniqueness of Einstein Rings

Saha¹,

Williams²

2001

The Astronomical Journal

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We explain how an approximation to the rings formed by the host galaxies in lensed QSOs can be inferred from the QSO data alone. A simple ring image can be made from any lens model by a simple piece of computer graphics : just plot a contour map of the arrival-time surface with closely spaced contours. We go on to explain that rings should be (1) sensitive to time-delay ratios between di †erent pairs of images, but (2)

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“…In particular, it can provide us with rich information as regards the structure of compact astrophysical objects like e.g., black holes, exotic matter, super-dense neutron stars, wormholes etc. Out of this, the observation of Einstein rings and the double or multiple mirror images are powerful examples of the gravitational lensing effect [15,16]. In earlier work, the GL phenomenon has been studied in the weak field case (see [17]), but success leads one to explore another extreme regime; namely, the GL effect in a strong gravitational field has been studied by [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Wormhole supported by dark energy admitting conformal motion

Bhar¹,

Rahaman

Manna

et al. 2016

Eur. Phys. J. C

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In this article, we study the possibility of sustaining static and spherically symmetric traversable wormhole geometries admitting conformal motion in Einstein gravity, which presents a more systematic approach to search a relation between matter and geometry. In wormhole physics, the presence of exotic matter is a fundamental ingredient and we show that this exotic source can be dark energy type which support the existence of wormhole spacetimes. In this work we model a wormhole supported by dark energy which admits conformal motion. We also discuss the possibility of the detection of wormholes in the outer regions of galactic halos by means of gravitational lensing. Studies of the total gravitational energy for the exotic matter inside a static wormhole configuration are also performed.

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Unusual radio source MG1131+0456: a possible Einstein ring

Cited by 149 publications

References 10 publications

Astrophysics of Bertrand space-times

Astrophysics of Bertrand space-times

Beware the Nonuniqueness of Einstein Rings

Wormhole supported by dark energy admitting conformal motion

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