Results 1 to 10 of about 790,274 (168)

Gravitational Lens Time Delays Using Polarization Monitoring

Galaxies, 2017
Gravitational lens time delays provide a means of measuring the expansion of the Universe at high redshift (and therefore in the ‘Hubble flow’) that is independent of local calibrations.
Andrew Biggs, Ian Browne
doaj   +2 more sources

Spacetime perspective of gravitational lensing in perturbed cosmologies [PDF]

Sci Rep
We develop the spacetime approach to gravitational lensing by spherically symmetric perturbations of flat, cosmological constant-dominated Friedman-Robertson-Walker metrics.
Kling T, Pooler S.
europepmc   +2 more sources

A SHARP view of H0LiCOW: H0 from three time-delay gravitational lens systems with adaptive optics imaging [PDF]

Monthly notices of the Royal Astronomical Society, 2019
We present the measurement of the Hubble constant, H0, with three strong gravitational lens systems. We describe a blind analysis of both PG 1115+080 and HE 0435−1223 as well as an extension of our previous analysis of RXJ 1131−1231.
G. Chen, C. Fassnacht, S. Suyu, C. Rusu, J. Chan, Kenneth C. Wong, M. Auger, S. Hilbert, V. Bonvin, S. Birrer, M. Millon, L. Koopmans, D. Lagattuta, J. McKean, S. Vegetti, F. Courbin, Xuheng Ding, A. Halkola, I. Jee, A. Shajib, D. Sluse, A. Sonnenfeld, T. Treu   +22 more
semanticscholar   +1 more source

Overconstrained gravitational lens models and the Hubble constant [PDF]

Monthly notices of the Royal Astronomical Society, 2019
It is well known that measurements of H0 from gravitational lens time delays scale as H0 ∝ 1 − κE, where κE is the mean convergence at the Einstein radius RE but that all available lens data other than the delays provide no direct constraints on κE ...
C. B. D. O. Astronomy, The Ohio State University   +1 more
semanticscholar   +1 more source

The strong gravitational lens finding challenge [PDF]

Astronomy & Astrophysics, 2018
Large-scale imaging surveys will increase the number of galaxy-scale strong lensing candidates by maybe three orders of magnitudes beyond the number known today.
R. Metcalf, M. Meneghetti, Camille Avestruz, F. Bellagamba, C. Bom, E. Bertin, R. Cabanac, F. Courbin, A. Davies, Etienne Decencière, Rémi Flamary, R. Gavazzi, M. Geiger, P. Hartley, M. Huertas-Company, N. Jackson, E. Jullo, J. Kneib, L. Koopmans, F. Lanusse, Chun-Liang Li, Quanbin Ma, M. Makler, Nan Li, M. Lightman, C. E. Petrillo, S. Serjeant, C. Schafer, A. Sonnenfeld, A. Tagore, Crescenzo Tortora, D. Tuccillo, Manuel B. Valent'in, S. Velasco-Forero, G. V. Kleijn, G. Vernardos   +35 more
semanticscholar   +1 more source

Strong Gravitational Lensing as a Probe of Dark Matter [PDF]

Space Science Reviews, 2023
Dark matter structures within strong gravitational lens galaxies and along their lines of sight leave a gravitational imprint on the multiple images of lensed sources.
S. Vegetti, S. Birrer, G. Despali, C. Fassnacht, D. Gilman, Y. Hezaveh, L., Perreault Levasseur, J. McKean, D. Powell, C. M. O'Riordan, G., Vernardos   +12 more
semanticscholar   +1 more source

Gaia GraL: Gaia DR2 gravitational lens systems [PDF]

Astronomy & Astrophysics, 2018
We report the spectroscopic confirmation and modeling of the quadruply imaged quasar GRAL 113100–441959, the first gravitational lens (GL) to be discovered from a machine learning technique that only relies on the relative positions and fluxes of the ...
O. Wertz, D. Stern, A. Krone-Martins, L. Delchambre, C. Ducourant, U. Jørgensen, M. Dominik, M. Burgdorf, J. Surdej, F. Mignard, R. Teixeira, L. Galluccio, J. Klüter, S. Djorgovski, M. Graham, U. Bastian, J. Wambsganss, C'eline Boehm, J. Lecampion, E. Slezak   +19 more
semanticscholar   +1 more source

DETERMINE THE EFFECTIVE PARAMETERS IN GRAVITATIONAL LENSES AND STUDY THE ALTERNATIVE EFFECTS BETWEEN THEM [PDF]

مجلة جامعة الانبار للعلوم الصرفة, 2012
The importance of the gravitational lens in cosmology and astronomy, and a brief historical review for the evolution of the gravitational lenses have been introduced.
S. A.AL-SABAAWE, M. A.AL-OBAYDE
doaj   +1 more source

Gravitational Lensing of Supernova Neutrino Bursts

Universe, 2021
Supernova neutrino bursts have been observed from extragalactic distances. This note addresses the question of how gravitational lensing could distort the information in the burst.
John M. LoSecco
doaj   +1 more source

Gravitational Lensing of Continuous Gravitational Waves

Universe, 2021
Continuous gravitational waves are analogous to monochromatic light and could therefore be used to detect wave effects such as interference or diffraction. This would be possible with strongly lensed gravitational waves.
Marek Biesiada, Sreekanth Harikumar
doaj   +1 more source