Multifrequency radio observations of the gravitational lens system 1938 + 666

King, L. J.; Browne, I. W. A.; Muxlow, T. W. B.; Narasimha, D.; Patnaik, A. R.; Porcas, R. W.; Wilkinson, P. N.

doi:10.1093/mnras/289.2.450

Cited by 45 publications

(48 citation statements)

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“…It has been shown the singular isothermal sphere (SIS) is an accurate first-order approximation for an elliptical galaxy acting as lens ( [45][46][47][48][73][74][75][76]). In these cases, the modeled SIS velocity dispersion (σ mod ) is in good agreement with the central velocity dispersion measured spectroscopically (σ obs )( [46][47][48][49]).…”

Section: The Samplementioning

confidence: 99%

Constraints on holographic cosmologies from strong lensing systems

Cárdenas

Bonilla

Motta

et al. 2013

J. Cosmol. Astropart. Phys.

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We use strongly gravitationally lensed (SGL) systems to put additional constraints on a set of holographic dark energy models. Data available in the literature (redshift and velocity dispersion) is used to obtain the Einstein radius and compare it with model predictions. We found that the ΛCDM is the best fit to the data. Although a preliminary statistical analysis seems to indicate that two of the holographic models studied show interesting agreement with observations, a stringent test lead us to the result that neither of the holographic models are competitive with the ΛCDM.These results highlight the importance of Strong Lensing measurements to provide additional observational constraints to alternative cosmological models, which are necessary to shed some light into the dark universe.

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Section: The Samplementioning

confidence: 99%

Constraints on holographic cosmologies from strong lensing systems

Cárdenas

Bonilla

Motta

et al. 2013

J. Cosmol. Astropart. Phys.

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“…B1938+666 consists of a normal early-type lens galaxy of redshift z l ¼ 0:88 (Tonry & Kochanek 2000) that produces a two-image system and a four-image system of a radio source of unknown redshift (King et al 1997). The host galaxy is seen as an almost perfectly circular ring around the lens (King et al 1998).…”

Section: Observationsmentioning

confidence: 99%

“…We analyze the 2816 s NIC2 image taken on 1997 October 7. For the radio image positions, we use the 5 GHz observations of King et al (1997). We allow the registration of radio and optical coordinates to be optimized as part of the fit.…”

Section: Observationsmentioning

confidence: 99%

Halo Structures of Gravitational Lens Galaxies

Yoo

Kochanek

Falco

et al. 2006

ApJ

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We explore the halo structure of four gravitational lenses with well-observed, thin Einstein rings. We find that the gravitational potentials are well described by ellipsoidal density distributions in the sense that the best-fit nonellipsoidal models have parameters consistent with their ellipsoidal counterparts. We find upper limits on the standard parameters for the deviation from an ellipse of |a_3/a_0|<0.023, 0.019, 0.037, and 0.035, and |a_4/a_0|<0.034, 0.041, 0.051, and 0.064 for SDSS J0924+0219, HE0435-1223, B1938+666, and PG1115+080, respectively. We find that the lens galaxies are at the centers of their dark matter halos, and obtain upper limits for the offset of each center of mass from the center of light of |Delta x|<0.004, 0.005, 0.009, and 0.005 arcsec, corresponding to 22, 29, 70, and 23 pc. These limits also exclude the possibility of any significant lopsidednessof the dark matter halos and set an upper limit of f_sat

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“…Those that were found to possess multiple components or very complex structure have been followed-up either with the VLA or with MERLIN and the VLBA to give high resolution images (King et al, 1998). By this process the lens systems B0218+257 (Patnaik et al 1993b), B1422+231 (Patnaik et al 1992b) and B1938+666 (King et al 1997) were discovered. Also in the survey is the known system MG0414+0534 (Hewitt et al 1989;Hewitt et al 1992) and the probable lens B2114+022 (Augusto et al 1998).…”

Section: Introductionmentioning

confidence: 99%

The new gravitational lens system B1030 + 074

Xanthopoulos

Browne

King

et al. 1998

Monthly Notices RAS

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We report the discovery of a new double image gravitational lens system B1030+074 which was found during the Jodrell Bank -VLA Astrometric Survey (JVAS). We have collected extensive radio data on the system using the VLA, MERLIN, the EVN and the VLBA and optical observations using WFPC2 on the HST. The lensed images are separated by 1.56 arcseconds and their flux density ratio at centimetric wavelengths is approximately 14:1 although the ratio is slightly frequency dependent and the images appear to be time variable. The HST pictures show both the lensed images and the lensing galaxy close to the weaker image. The lensing galaxy has substructure which could be a spiral arm or an interacting galaxy.

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Multifrequency radio observations of the gravitational lens system 1938 + 666

Cited by 45 publications

References 0 publications

Constraints on holographic cosmologies from strong lensing systems

Constraints on holographic cosmologies from strong lensing systems

Halo Structures of Gravitational Lens Galaxies

The new gravitational lens system B1030 + 074

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