Results 41 to 50 of about 797,854 (217)

THE SL2S GALAXY-SCALE GRAVITATIONAL LENS SAMPLE. I. THE ALIGNMENT OF MASS AND LIGHT IN MASSIVE EARLY-TYPE GALAXIES AT z = 0.2–0.9 [PDF]

, 2012
We study the relative alignment of mass and light in a sample of 16 massive early-type galaxies at z = 0.2–0.9 that act as strong gravitational lenses.
R. Gavazzi, T. Treu, P. Marshall, F. Brault, Andrea J. Ruff   +4 more
semanticscholar   +1 more source

The Longest Delay: A 14.5 yr Campaign to Determine the Third Time Delay in the Lensing Cluster SDSS J1004+4112

The Astrophysical Journal, 2022
We present new light curves for the four bright images of the five image cluster-lensed quasar gravitational lens system SDSS J1004+4112. The light curves span 14.5 yr and allow the measurement of the time delay between the trailing bright quasar image D
J. A. Muñoz, C. S. Kochanek, J. Fohlmeister, J. Wambsganss, E. Falco, R. Forés-Toribio   +5 more
doaj   +1 more source

Numerical Investigation on Magnetically Actuated Tunable Micro Liquid Lens [PDF]

MATEC Web of Conferences, 2020
In this paper, magnetically actuated tunable liquid lens is fundamentally studied to have further potential application scope in research, industrial, aeronautical and astronautical areas.
Wu Shi-Hua, Zhu Gui-Ping, Huang Hu-Lin
doaj   +1 more source

The SWELLS survey – II. Breaking the disc–halo degeneracy in the spiral galaxy gravitational lens SDSS J2141−0001 [PDF]

, 2011
The degeneracy among the disc, bulge and halo contributions to galaxy rotation curves prevents an understanding of the distribution of baryons and dark matter in disc galaxies.
A. Dutton, A. Dutton, B. Brewer, Philip J. Marshall, Philip J. Marshall, M. Auger, T. Treu, D. Koo, A. Bolton, Bradford P. Holden, L. Koopmans   +10 more
semanticscholar   +1 more source

Pixelated Reconstruction of Foreground Density and Background Surface Brightness in Gravitational Lensing Systems Using Recurrent Inference Machines

The Astrophysical Journal, 2023
Modeling strong gravitational lenses in order to quantify distortions in the images of background sources and to reconstruct the mass density in foreground lenses has been a difficult computational challenge.
Alexandre Adam, Laurence Perreault-Levasseur, Yashar Hezaveh, Max Welling   +3 more
doaj   +1 more source

DISENTANGLING BARYONS AND DARK MATTER IN THE SPIRAL GRAVITATIONAL LENS B1933+503 [PDF]

, 2011
Measuring the relative mass contributions of luminous and dark matter in spiral galaxies is important for understanding their formation and evolution. The combination of a galaxy rotation curve and strong lensing is a powerful way to break the disk–halo ...
S. Suyu, S. Suyu, S. Hensel, J. McKean, C. Fassnacht, T. Treu, A. Halkola, M. Norbury, N. Jackson, P. Schneider, D. Thompson, M. Auger, L. Koopmans, K. Matthews   +13 more
semanticscholar   +1 more source

The Effects of Finite Distance on the Gravitational Deflection Angle of Light

Universe, 2019
In order to clarify the effects of the finite distance from a lens object to a light source and a receiver, the gravitational deflection of light has been recently reexamined by using the Gauss−Bonnet (GB) theorem in differential geometry (Ishihara
Toshiaki Ono, Hideki Asada
doaj   +1 more source

KiDS-450: cosmological parameter constraints from tomographic weak gravitational lensing [PDF]

, 2016
We present cosmological parameter constraints from a tomographic weak gravitational lensing analysis of ~450deg$^2$ of imaging data from the Kilo Degree Survey (KiDS).
H. Hildebrandt, M. Viola, C. Heymans, S. Joudaki, K. Kuijken, C. Blake, T. Erben, B. Joachimi, D. Klaes, L. Miller, C. Morrison, R. Nakajima, G. V. Kleijn, A. Amon, A. Choi, G. Covone, J. D. Jong, A. Dvornik, I. F. Conti, A. Grado, J. Harnois-D'eraps, R. Herbonnet, H. Hoekstra, F. Kohlinger, J. McFarland, A. Mead, J. Merten, N. Napolitano, J. Peacock, M. Radovich, P. Schneider, P. Simon, E. Valentijn, J. L. V. D. Busch, E. V. Uitert, L. Waerbeke   +35 more
semanticscholar   +1 more source

A STUDY OF GRAVITATIONAL LENS CHROMATICITY USING GROUND-BASED NARROWBAND PHOTOMETRY [PDF]

, 2010
We present observations of wavelength-dependent flux ratios for four gravitational lens systems (SDSS J1650+4251, HE 0435−1223, FBQ 0951+2635, and Q 0142−100) obtained with the Nordic Optical Telescope.
A. Mosquera, J. A. Muñoz, E. Mediavilla, C. S. Kochanek   +3 more
semanticscholar   +1 more source

Exoplanet Searches by Future Deep Space Missions

EPJ Web of Conferences, 2011
The search for exoplanets could benefit from gravitational lensing if we could get to 550 AU from the Sun and beyond. This is because the gravitational lens of the Sun would highly intensify there any weak electromagnetic wave reaching the solar system ...
Maccone C.
doaj   +1 more source