Results 71 to 80 of about 27,585 (119)

Weak Gravitational Lensing—The Need for Surveys [PDF]

Symposium - International Astronomical Union, 1997
Light rays from distant sources are deflected if they pass near an intervening matter inhomogeneity. This gravitational lens effect is responsible for the well-established lens systems like multiple-imaged QSOs, (radio) ‘Einstein’ rings, the giant luminous arcs in clusters of galaxies, and the flux variations of stars in the LMC and the Galactic bulge ...
openaire   +2 more sources

Dynamics of Fermat potentials in non-perturbative gravitational lensing

, 2002
We present a framework, based on the null-surface formulation of general relativity, for discussing the dynamics of Fermat potentials for gravitational lensing in a generic situation without approximations of any kind.
Ezra T. Newman, F. Hammer, J. Ivancovich, N. Kaiser, S. Frittelli, S. Frittelli, S. Frittelli, S. Frittelli, S. Frittelli, S. Frittelli, S. Frittelli, S. Frittelli, Simonetta Frittelli, T. Padmanabhan, T. Pyne, T. Pyne, V. Faraoni   +16 more
core   +1 more source

Particle dynamics and gravitational weak lensing around black hole in the Kalb-Ramond gravity

European Physical Journal C: Particles and Fields, 2022
In this paper, we have studied the particle dynamics, gravitational lensing and energy processes around the black hole (BH) in Kalb–Ramond (KR) gravity.
Farruh Atamurotov, Dilmurod Ortiqboev, Ahmadjon Abdujabbarov, G. Mustafa   +3 more
doaj   +1 more source

Weak Gravitational Lensing

25 pagers, 14 figures. This is a pre-print of a chapter for the Encyclopedia of Astrophysics (edited by I. Mandel, section editor C.
Prat, J., Bacon, D.
openaire   +2 more sources

A Weak Gravitational Lensing Analysis of Abell 2390 [PDF]

The Astrophysical Journal, 1996
14 pages, latex file. Postscript file and one additional figure are available at ftp://magicbean.berkeley.edu/pub/squires/a2390/massandlight.ps ...
David Woods, Arif Babul, Nick Kaiser, Gregory G. Fahlman, Gordon K. Squires   +4 more
openaire   +3 more sources

Forecasting the Detection of Lyman-alpha Forest Weak Lensing from the Dark Energy Spectroscopic Instrument and Other Future Surveys

The Open Journal of Astrophysics
The apparent angular positions of quasars are deflected on the sky by the gravitational field sourced by foreground matter. This weak lensing effect is measurable through the distortions it introduces in the lensed quasar spectra.
Patrick Shaw, Rupert A. C. Croft, R. Benton Metcalf   +2 more
doaj   +1 more source

INTRINSIC GALAXY ALIGNMENTS AND WEAK GRAVITATIONAL LENSING [PDF]

The Shapes of Galaxies and Their Dark Halos, 2002
8 pages.
openaire   +4 more sources

A deconstruction of methods to derive one-point lensing statistics

The Open Journal of Astrophysics
Gravitational lensing is a crucial tool for exploring cosmic phenomena, providing insights into galaxy clustering, dark matter, and dark energy. Given the substantial computational demands of $N$-body simulations, approximate methods like $\texttt ...
Viviane Alfradique, Tiago Castro, Valerio Marra, Miguel Quartin, Carlo Giocoli, Pierluigi Monaco   +5 more
doaj   +1 more source

Ellipticities of Galaxy Cluster Halos from Halo–Shear–Shear Correlations

The Astrophysical Journal
We report the first detection of the halo ellipticities of galaxy clusters by applying the halo–shear–shear correlations (HSSCs), without the necessity of using major axis determination.
Zhenjie Liu, Jun Zhang, Cong Liu, Hekun Li   +3 more
doaj   +1 more source

Forecast of Joint Analysis of Cosmic Shear and Supernovae Magnification from the CSST and LSST

The Astrophysical Journal
Cosmic shear and cosmic magnification reflect the same gravitational lensing field. Each of these two probes are affected by different systematics. We study the auto- and cross-correlations of cosmic shear from the China Space Survey Telescope and cosmic
Ye Cao, Bin Hu, Ji Yao, Hu Zhan
doaj   +1 more source