Results 31 to 40 of about 34,013 (306)
Precision Modeling of JWST's First Cluster Lens SMACS J0723.3–7327
The Astrophysical Journal, 2023 Exploiting the fundamentally achromatic nature of gravitational lensing, we present a lens model for the massive galaxy cluster SMACS J0723.3−7323 (SMACS J0723; z = 0.388) that significantly improves upon earlier work.
Guillaume Mahler +14 more
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Strong Gravitational Lensing: Bright Galaxies & Lost Dark-Matter [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractGravitational lensing and stellar dynamics provide two complementary methods to probe the smooth and clumpy stellar and dark-matter mass distribution in early-type galaxies, currently already over a range of two orders of magnitude in virial mass, more than ten orders of magnidude in dynamic mass range in each galaxy (i.e.
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Two Lensed Star Candidates at z ≃ 4.8 behind the Galaxy Cluster MACS J0647.7+7015
The Astrophysical Journal Letters, 2023 We report the discovery of two extremely magnified lensed star candidates behind the galaxy cluster MACS J0647.7+015 using recent multiband James Webb Space Telescope (JWST) NIRCam observations. The star candidates are seen in a previously known, z _phot
Ashish Kumar Meena +28 more
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Strong gravitational lensing of explosive transients [PDF]
Reports on Progress in Physics, 2019 44 pages, 20 figures, a review article to be published in Reports on Progress in ...
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Strong Gravitational Lensing and Galactic Bulges [PDF]
The Astrophysical Journal, 2003 13 pages, 2 figures, the shortened version was accepted by ApJ(Letters)
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The Astrophysical Journal, 2023 In this work, we adopt a cosmological model-independent approach for the first time to test the question of whether the mass density power-law index ( γ ) of strong gravitational lensing systems (SGLSs) evolves with redshift, and the joint light-curve ...
Jian Hu
doaj +1 more source
Strong gravitational lensing with Gauss-Bonnet correction [PDF]
Journal of Cosmology and Astroparticle Physics, 2014 In this paper we investigate the strong gravitational lensing with Gauss-Bonnet gravity. By considering the logarithmic term for deflection angle, we obtain the deflection angle $\hat $ and corresponding parameters $\bar{a}$ and $\bar{b}$. Finally, by using the relations between the observables and lensing parameters, we estimate the observables such ...
Sadeghi, J., Vaez, H.
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Study of Errors in Strong Gravitational Lensing [PDF]
The Astrophysical Journal, 2008 We examine the accuracy of strong gravitational lensing determinations of the mass of galaxy clusters by comparing the conventional approach with the numerical integration of the fully relativistic null geodesic equations in the case of weak gravitational perturbations on Robertson-Walker metrics.
Kling, Thomas P., Frittelli, S.
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A New Survey for Giant Arcs [PDF]
, 2006 We report on the first results of an imaging survey to detect strong gravitational lensing targeting the richest clusters selected from the photometric data of the Sloan Digital Sky Survey (SDSS) with follow-up deep imaging observations from the ...
Adelman-McCarthy J. K. +26 more
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Strong field gravitational lensing in scalar tensor theories
, 2006 Strong field gravitational lensing in the Brans-Dicke theory has been studied. The deflection angle for photons passing very close to the photon sphere is estimated for the static spherically symmetric space-time of the theory and the position and ...
Arunava Bhadra +17 more
core +2 more sources