Results 111 to 120 of about 68,770 (225)
The imprint of $f(R)$ gravity on weak gravitational lensing – I. Connection between observables and large-scale structure [PDF]
, 2016 We study the effect of f(R) gravity on the statistical properties of various large-scale structures which can be probed in weak gravitational lensing measurements.
Y. Higuchi, M. Shirasaki
semanticscholar +1 more source
Detecting gravitational lensing by matter currents
Astronomy & AstrophysicsWe explored the observational prospects for detecting gravitational lensing induced by cosmological matter currents, a relativistic correction to the standard density lensing effect arising from the motion of matter.
Murray C., Kou R., Bartlett J. G.
doaj +1 more source
Weak gravitational lensing with CO galaxies [PDF]
, 2018 Optical weak lensing surveys have become a powerful tool for precision cosmology, but remain subject to systematic effects that can severely bias cosmological parameter estimates if not carefully removed. We discuss the possibility of performing complementary weak lensing surveys at radio/microwave frequencies, using detections of CO-emitting galaxies ...
Bull, P, Harrison, I, Huff, E
openaire +3 more sources
Precision Measurement of Large Shear Signals
The Astrophysical Journal LettersSo far, estimators of galaxy shape distortions are only carefully studied perturbatively in the case of small shear signals, mainly for weak-lensing science.
Jiarui Sun +4 more
doaj +1 more source
Combining weak and strong lensing in cluster potential reconstruction
, 2005 We propose a method for recovering the two-dimensional gravitational potential of galaxy clusters which combines data from weak and strong gravitational lensing. A first estimate of the potential from weak lensing is improved at the approximate locations
Bartelmann +17 more
core +1 more source
Gravitational lensing in Tangherlini spacetime in the weak gravitational field and the strong gravitational field [PDF]
, 2014 The gravitational lensing effects in the weak gravitational field by exotic lenses have been investigated intensively to find nonluminous exotic objects.
N. Tsukamoto +3 more
semanticscholar +1 more source
Instrumental systematics and weak gravitational lensing [PDF]
Journal of Instrumentation, 2015 We present a pedagogical review of the weak gravitational lensing measurement process and its connection to major scientific questions such as dark matter and dark energy. Then we describe common ways of parametrizing systematic errors and understanding how they affect weak lensing measurements.
openaire +2 more sources
WEAK GRAVITATIONAL LENSING BY STOCHASTIC GRAVITATIONAL WAVE BACKGROUND [PDF]
Publications of The Korean Astronomical Society, 2007 On the formulation frameworks of linearly perturbed spacetime and weak gravitational lensing(WGL) we studied the statistical properties of a bundle of light rays propagating through stochastic gravitational wave background(SGWB). For this we considered the SGWB as tensor perturbations of linearly perturbed Friedmann spacetime.
openaire +1 more source
Effect of Mask Regions on Weak Lensing Statistics
, 2013 Sky masking is unavoidable in wide-field weak lensing observations. We study how masks affect the measurement of statistics of matter distribution probed by weak gravitational lensing.
Hamana, Takashi +2 more
core +1 more source
UniverseThe unified Einstein–Euler–Heisenberg theory is utilized to investigate the particle motion and weak gravitational lensing characteristics of black holes.
Allah Ditta +6 more
doaj +1 more source