Results 51 to 60 of about 67,033 (286)

Weak gravitational lensing by stringy black holes [PDF]

The European Physical Journal Plus, 2019
In this paper, we discuss the weak gravitational lensing in the context of stringy black holes. Initially, we examine the deflection angle of photon by charged stringy black hole.
W. Javed, Muhammad Bilal Khadim, J. Abbas, A. Övgün   +3 more
semanticscholar   +1 more source

Weak lensing, dark matter and dark energy

, 2010
Weak gravitational lensing is rapidly becoming one of the principal probes of dark matter and dark energy in the universe. In this brief review we outline how weak lensing helps determine the structure of dark matter halos, measure the expansion rate of ...
A. Amara, A. Cooray, A. Cooray, A. Leauthaud, A. Leauthaud, A. Refregier, A. Refregier, A.F. Heavens, A.N. Taylor, A.P. Hearin, A.R. Zentner, B. Jain, B. Jain, B. Jain, B. Joachimi, C. Heymans, C. Schimd, C. Shapiro, C. Shapiro, D. Clowe, D. Huterer, D. Huterer, D. Huterer, D. Huterer, D. Huterer, D. Munshi, D. Wittman, D. Wittman, D. Wittman, D.E. Johnston, D.H. Rudd, D.J. Bacon, D.M. Wittman, D.N. Spergel, Dragan Huterer, E. Rozo, E.S. Sheldon, E.S. Sheldon, E.V. Linder, E.V. Linder, F. Bernardeau, F. Bernardeau, F. Schmidt, F. Schmidt, G. Bernstein, G. Bernstein, G. Wilson, G.B. Zhao, G.M. Bernstein, G.M. Bernstein, G.R. Dvali, H. Dahle, H. Hoekstra, H. Hoekstra, H. Hoekstra, H. Hoekstra, H. Oyaizu, H. Zhan, J. Benjamin, J. Frieman, J. Guzik, J. Miralda-Escude, J. Rhodes, J. Zhang, J.A. Tyson, J.F. Hennawi, J.M. Kratochvil, J.P. Dietrich, J.P. Uzan, K. Heitmann, K. Heitmann, K. Heitmann, L. Amendola, L. Fu, L. Hui, L. Marian, L. Marian, L. Van Waerbeke, L. Waerbeke van, M. Bartelmann, M. Hetterscheidt, M. Ishak, M. Jarvis, M. Jarvis, M. Kamionkowski, M. Kilbinger, M. Kleinheinrich, M. Schirmer, M. Takada, M. Takada, M. Takada, M. Takada, M.J. White, M.J. White, M.L. Brown, N. Kaiser, N. Kaiser, N. Padmanabhan, P. Fischer, P. Schneider, P. Schneider, P. Simon, R. Mandelbaum, R. Mandelbaum, R. Massey, R. Massey, R. Massey, R. Reyes, S. Dodelson, S. Dodelson, S. Miyazaki, S.F. Daniel, T. Hamana, T.D. Kitching, T.G. Brainerd, U.L. Pen, W. Hu, W. Hu, W. Hu, W. Hu, W. Hu, W.J. Fang, Z. Ma, Z.M. Ma   +123 more
core   +1 more source

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, Daniel J. Mortlock, Dyer, Einstein, Irwin, Kayser, Kayser, Kofman, Lewis, Lynds, Narayan, Paczyński, Peacock, Pei, R. L. Webster, Rauch, Schneider, Schneider, Schneider, Soucail, Walsh, Wambsganss, Wambsganss, Wambsganss, Weinberg   +24 more
core   +3 more sources

Cross-correlation of the thermal Sunyaev–Zel’dovich effect and weak gravitational lensing: Planck and Subaru Hyper Suprime-Cam first-year data [PDF]

Monthly notices of the Royal Astronomical Society, 2019
Cross-correlation analysis of the thermal Sunyaev–Zel’dovich (tSZ) effect and weak gravitational lensing (WL) provides a powerful probe of cosmology and astrophysics of the intracluster medium. We present the measurement of the cross-correlation of tSZ
K. Osato, M. Shirasaki, H. Miyatake, D. Nagai, N. Yoshida, M. Oguri, R. Takahashi   +6 more
semanticscholar   +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, B. Joachimi, Bacon, Benjamin, Bernstein, Bridle, Bridle, Brown, Catelan, Crittenden, Croft, Eifler, Eisenstein, Fu, Heymans, Heymans, Heymans, Hirata, Hirata, Huterer, Ilbert, Jing, Joachimi, Joachimi, Joachimi, King, King, King, Kitching, Lee, Mackey, Mandelbaum, Munshi, Okumura, Okumura, P. Schneider, Pen, Schneider, Schrabback, Semboloni, Smail, Smith, Takada, Tegmark, van den Bosch, van Waerbeke, Wittman   +46 more
core   +1 more source

Optical properties of null geodesics emerging from dynamical systems

European Physical Journal C: Particles and Fields, 2022
We study optical metrics via null geodesics as a central force system, deduce the related Binet equation and apply the analysis to certain solutions of Einstein’s equations with and without spherical symmetry.
D. Batic, S. Chanda, P. Guha
doaj   +1 more source

Weak lensing of the CMB

, 2009
The cosmic microwave background (CMB) represents a unique source for the study of gravitational lensing. It is extended across the entire sky, partially polarized, located at the extreme distance of z=1100, and is thought to have the simple, underlying ...
Challinor, Anthony, Hanson, Duncan, Lewis, Antony   +2 more
core   +1 more source

KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering [PDF]

, 2017
We perform a combined analysis of cosmic shear tomography, galaxy-galaxy lensing tomography, and redshift-space multipole power spectra (monopole and quadrupole) using 450 deg(2) of imaging data by the Kilo Degree Survey (KiDS-450) overlapping with two ...
S. Joudaki, C. Blake, Andrew Johnson, A. Amon, M. Asgari, A. Choi, T. Erben, K. Glazebrook, J. Harnois-Déraps, C. Heymans, H. Hildebrandt, H. Hoekstra, D. Klaes, K. Kuijken, C. Lidman, A. Mead, L. Miller, D. Parkinson, G. Poole, P. Schneider, M. Viola, C. Wolf   +21 more
semanticscholar   +1 more source

The mass–richness relation of optically selected clusters from weak gravitational lensing and abundance with Subaru HSC first-year data [PDF]

Nippon Tenmon Gakkai obun kenkyu hokoku, 2019
Constraining the relation between the richness N and the halo mass M over a wide redshift range for optically selected clusters is a key ingredient for cluster-related science in optical surveys, including the Subaru Hyper Suprime-Cam (HSC) survey.
Ryoma Murata, M. Oguri, T. Nishimichi, M. Takada, R. Mandelbaum, S. More, M. Shirasaki, A. Nishizawa, K. Osato   +8 more
semanticscholar   +1 more source

Gravitational lensing by a black-bounce-Reissner–Nordström spacetime

European Physical Journal C: Particles and Fields, 2022
We investigate the weak and strong deflection gravitational lensing by a black-bounce-Reissner–Nordström spacetime and obtain their lensing observables. Assuming the supermassive black holes in the Galactic Center and at the center of M87, Sgr A* and M87*
Jing Zhang, Yi Xie
doaj   +1 more source