Results 51 to 60 of about 95,116 (297)
Effects of early dark energy on strong cluster lensing [PDF]
, 2006 We use the semi-analytic method developed by Fedeli et al. for computing strong-lensing optical depths to study the statistics of gravitational arcs in four dark-energy cosmologies. Specifically, we focus on models with early dark energy and compare them
Bartelmann +52 more
core +1 more source
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
doaj +1 more source
Joint constraints on thermal relic dark matter from strong gravitational lensing, the Ly α forest, and Milky Way satellites [PDF]
Monthly notices of the Royal Astronomical Society, 2020 We derive joint constraints on the warm dark matter (WDM) half-mode scale by combining the analyses of a selection of astrophysical probes: strong gravitational lensing with extended sources, the Ly α forest, and the number of luminous satellites in ...
Wolfgang Enzi +12 more
semanticscholar +1 more source
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
doaj +1 more source
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.
openaire +2 more sources
Parameters estimation and strong gravitational lensing of nonsingular Kerr-Sen black holes [PDF]
, 2020 The recent time witnessed a surge of interest in strong gravitational lensing by black holes is due to the Event Horizon Telescope (EHT) results, which suggest comparing the black hole lensing in both general relativity and heterotic string theory.
Sushant G. Ghosh +2 more
semanticscholar +1 more source
What does strong gravitational lensing? The mass and redshift distribution of high-magnification lenses [PDF]
Monthly notices of the Royal Astronomical Society, 2020 Many distant objects can only be detected, or become more scientifically valuable, if they have been highly magnified by strong gravitational lensing.
A. Robertson +6 more
semanticscholar +1 more source
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
Phase effects from strong gravitational lensing of gravitational waves [PDF]
Physical Review D, 2020 Assessing the probability that two or more gravitational wave (GW) events are lensed images of the same source requires an understanding of the properties of the lensed images.
J. Ezquiaga +4 more
semanticscholar +1 more source
Strong Gravitational Lensing and Galactic Bulges [PDF]
The Astrophysical Journal, 2003 13 pages, 2 figures, the shortened version was accepted by ApJ(Letters)
openaire +2 more sources