Results 71 to 80 of about 797,854 (217)

Models of the Cosmic Horseshoe gravitational lens J1004+4112 [PDF]

, 2008
We model the extremely massive and luminous lens galaxy in the Cosmic Horseshoe Einstein ring system J1004+4112, recently discovered in the Sloan Digital Sky Survey.
S. Dye, N. Evans, V. Belokurov, Stephen J. Warren, P. Hewett   +4 more
semanticscholar   +1 more source

Null gravitational redshift by a Reissner–Nordström black hole in the strong field limit

European Physical Journal C: Particles and Fields, 2020
The gravitational shift of electromagnetic frequency in the strong field limit is usually investigated under the common scenario, where the light receiver is far away from the central body while the emitter is in the strong-field region of the lens.
Guansheng He, Chaohong Pan, Xia Zhou, Weijun Li, Lin Li   +4 more
doaj   +1 more source

Dust and Extinction Curves in Galaxies with z > 0: The Interstellar Medium of Gravitational Lens Galaxies [PDF]

, 1999
We determine 37 differential extinctions in 23 gravitational lens galaxies over the range 0 ≲ zl ≲ 1. Only seven of the 23 systems have spectral differences consistent with no differential extinction.
E. Falco, C. Impey, C. Kochanek, J. Lehár, B. McLeod, H. Rix, C. Keeton, J. A. Muñoz, C. Astrophysics, Cambridge, MA Steward Observatory, U. Arizona, Tucson, Az   +13 more
semanticscholar   +1 more source

Multi wavelength study of the gravitational lens system RXS J1131-1231. II. Lens model and source reconstruction [PDF]

, 2006
Aims. High angular resolution images of the complex gravitational lens system RXS J1131-1231 (a quadruply imaged AGN with a bright Einstein ring) obtained with the Advanced Camera for Surveys and NICMOS instruments onboard the Hubble Space Telescope are ...
J. Claeskens, D. Sluse, P. Riaud, J. D. Liege, Belgium Ecole Polytechnique F'ed'erale de Lausanne, Switzerland.   +5 more
semanticscholar   +1 more source

High-resolution imaging of the anomalous flux ratio gravitational lens system CLASS B2045+265: dark or luminous satellites ? [PDF]

, 2006
The existence of flux ratio anomalies between fold and cusp images in galaxy-scale strong-lens systems has led to an interpretation based on the presence of a high mass fraction of cold dark matter (CDM) substructures around galaxies, as predicted by ...
J. McKean, L. Koopmans, C. E. Flack, C. Fassnacht, D. Thompson, K. Matthews, R. Blandford, A. Readhead, B. Davis, Mpifr, K. Institute, Bemidji State, Caltech Optical Observatories, Kipac, Caltech Astronomy   +14 more
semanticscholar   +1 more source

Uncovering a population of gravitational lens galaxies with magnified standard candle SN Zwicky. [PDF]

Nat Astron, 2023
Goobar A, Johansson J, Schulze S, Arendse N, Carracedo AS, Dhawan S, Mörtsell E, Fremling C, Yan L, Perley D, Sollerman J, Joseph R, Hinds KR, Meynardie W, Andreoni I, Bellm E, Bloom J, Collett TE, Drake A, Graham M, Kasliwal M, Kulkarni SR, Lemon C, Miller AA, Neill JD, Nordin J, Pierel J, Richard J, Riddle R, Rigault M, Rusholme B, Sharma Y, Stein R, Stewart G, Townsend A, Vinko J, Wheeler JC, Wold A.   +37 more
europepmc   +1 more source

Exploring Weak Gravitational Lensing Effects by a Regular Black Hole

Spektra: Jurnal Fisika dan Aplikasinya
Gravitational lensing is one of the physical consequences of Einstein’s general theory of relativity, which has been observationally confirmed. This work aims to study the weak gravitational lensing scenario where the lens is a spherically symmetric ...
A. K. Durrani, H. S. Ramadhan
doaj   +1 more source

lenstronomy: Multi-purpose gravitational lens modelling software package [PDF]

Physics of the Dark Universe, 2018
S. Birrer, A. Amara
semanticscholar   +1 more source

The Gaussian-Drude Lens: A Dusty Plasma Model Applicable to Observations Across the Electromagnetic Spectrum

Universe
When radiation from a background source passes through a cloud of cold plasma, diverging lensing occurs if the source and observer are well-aligned. Unlike gravitational lensing, plasma lensing is dispersive, increasing in strength with wavelength.
Adam Rogers
doaj   +1 more source

Domain Adaptation in Application to Gravitational Lens Finding

The Astrophysical Journal
The next decade is expected to see a tenfold increase in the number of strong gravitational lenses, driven by new wide-field imaging surveys. To discover these rare objects, efficient automated detection methods need to be developed.
Hanna Parul, Sergei Gleyzer, Pranath Reddy, Michael W. Toomey   +3 more
doaj   +1 more source