Reducing the weak lensing noise for the gravitational wave Hubble diagram using the non-Gaussianity of the magnification distribution [PDF]
, 2010 Gravitational wave sources are a promising cosmological standard candle because their intrinsic luminosities are determined by fundamental physics (and are insensitive to dust extinction).
C. Shapiro +9 more
core +2 more sources
Weak Gravitational Lensing by Galaxies [PDF]
The Astrophysical Journal, 1996 We report a detection of weak, tangential distortion of the images of cosmologically distant, faint galaxies due to gravitational lensing by foreground galaxies. A mean image polarization of ({ital p})=0.011{plus_minus}0.006 (95{percent} confidence bounds) is obtained for 3202 pairs of source (23{lt}{ital r}{sub {ital s}}{le}24) and lens (20{le}{ital r}
Brainerd, Tereasa G. +2 more
openaire +2 more sources
Effect of the Brane-Dicke coupling parameter on weak gravitational lensing by wormholes and naked singularities [PDF]
Physical Review D, 2019 In this paper, we analyze the deflection angle of light by Brane-Dicke wormhole in the weak field limit approximation to find the effect of the Brane-Dicke coupling parameter on the weak gravitation lensing.
W. Javed, R. Babar, A. Ovgun
semanticscholar +1 more source
Intrinsic and Extrinsic Galaxy Alignment [PDF]
, 2000 We show with analytic models that the assumption of uncorrelated intrinsic ellipticities of target sources that is usually made in searches for weak gravitational lensing due to large-scale mass inhomogeneities (``field lensing'') is unwarranted.
Blandford, Roger D. +2 more
core +4 more sources
The Ray Bundle method for calculating weak magnification by gravitational lenses [PDF]
, 1998 We present here an alternative method for calculating magnifications in gravitational lensing calculations -- the Ray Bundle method. We provide a detailed comparison between the distribution of magnifications obtained compared with analytic results and ...
C. J. Fluke +24 more
core +3 more sources
Weak Gravitational lensing by phantom black holes and phantom wormholes using the Gauss–Bonnet theorem [PDF]
Annals of Physics, 2018 In this paper, we study the deflection of light by a class of phantom black hole and wormhole solutions in the weak limit approximation. More specifically, in the first part of this work, we study the deflection of light by Garfinkle-Horowitz-Strominger ...
A. Ovgun, G. Gyulchev, K. Jusufi
semanticscholar +1 more source
Shadows and gravitational weak lensing by the Schwarzschild black hole in the string cloud background with quintessential field [PDF]
Chinese Physics C, High Energy Physics & Nuclear Physics, 2022 In this study, we observe that, in the presence of the string cloud parameter a and the quintessence parameter γ, with the equation of state parameter , the radius of the shadow of the Schwarzschild black hole increases as compared with that in the pure ...
G. Mustafa +4 more
semanticscholar +1 more source
Compact Groups analysis using weak gravitational lensing [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We present a weak lensing analysis of a sample of SDSS Compact Groups (CGs). Using the measured radial density contrast profile, we derive the average masses under the assumption of spherical symmetry, obtaining a velocity dispersion for the Singular Isothermal Spherical model, $ _V = 270 \pm 40 \rm ~km~s^{-1}$, and for the NFW model, $R_{200}=0.53 ...
Chalela Garcia, Martin +3 more
openaire +4 more sources
Exact gravitational lensing and rotation curve [PDF]
, 2009 Based on the geodesic equation in a static spherically symmetric metric we discuss the rotation curve and gravitational lensing. The rotation curve determines one function in the metric without assuming Einstein's equations. Then lensing is considered in
A. Erdelyi +8 more
core +1 more source
Intrinsic alignment boosting: Direct measurement of intrinsic alignments in cosmic shear data [PDF]
, 2010 Intrinsic alignments constitute the major astrophysical systematic for cosmological weak lensing surveys. We present a purely geometrical method with which one can study gravitational shear-intrinsic ellipticity correlations directly in weak lensing data.
Amara +46 more
core +1 more source