Results 61 to 70 of about 236,146 (270)

Morphology of CMB fields—effect of weak gravitational lensing [PDF]

Journal of Cosmology and Astroparticle Physics, 2019
We study the morphology of the cosmic microwave background temperature and polarization fields using the shape and alignment parameters, β and α, that are constructed from the contour Minkowski tensor.
Priya Goyal, P. Chingangbam, S. Appleby
semanticscholar   +1 more source

Future prospects on testing extensions to ΛCDM through the weak lensing of gravitational waves [PDF]

Physical Review D, 2022
With planned space-based and 3rd generation ground-based gravitational wave detectors (LISA, Einstein Telescope, Cosmic Explorer), and proposed DeciHz detectors (DECIGO, Big Bang Observer), it is timely to explore statistical cosmological tests that can ...
Charlie T. Mpetha, G. Congedo, A. Taylor
semanticscholar   +1 more source

Weak gravitational lensing: A compact object with arbitrary quadrupole moment immersed in plasma [PDF]

Physical Review D, 2018
We study weak gravitational lensing around a quasi-Kerr black hole in the presence of plasma. The additional parameter $\epsilon$ regulating the quadrupole moment in the metric alters the deflection angle of light rays along with the plasma parameters ...
Hrishikesh Chakrabarty, Askar B. Abdikamalov, A. Abdujabbarov, C. Bambi   +3 more
semanticscholar   +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

Why weak lensing cluster shapes are insensitive to self-interacting dark matter [PDF]

, 2022
We investigate whether the shapes of galaxy clusters inferred from weak gravitational lensing can be used as a test of the nature of dark matter. We analyse mock weak lensing data, with gravitational lenses extracted from cosmological simulations run with two different dark matter models (CDM and SIDM).
arxiv   +1 more source

Gravitational lensing around Kehagias–Sfetsos compact objects surrounded by plasma

European Physical Journal C: Particles and Fields, 2019
We study the optical properties of the Kehagias–Sfetsos (KS) compact objects, characterized by the “Hořava” parameter $$\omega _{_{KS}}$$ ωKS , in the presence of plasma, considering its homogeneous or power-law density distribution.
Sudipta Hensh, Ahmadjon Abdujabbarov, Jan Schee, Zdeněk Stuchlík   +3 more
doaj   +1 more source

Weak gravitational lensing with the Square Kilometre Array [PDF]

, 2015
We investigate the capabilities of various stages of the SKA to perform world-leading weak gravitational lensing surveys. We outline a way forward to develop the tools needed for pursuing weak lensing in the radio band.
Abdalla, F. B., Bacon, D. J., Bridle, S., Brown, M. L., Camera, S., Harrison, I., Jarvis, M., Joachimi, B., Kitching, T. D., Metcalf, R. B., Miller, L., Patel, P., Pourtsidou, A., Takahashi, K., Zuntz, J. A.   +14 more
core   +3 more sources

Beyond adaptive preferences: Rethinking women's complicity in their own subordination

European Journal of Philosophy, Volume 30, Issue 4, Page 1317-1334, December 2022., 2022
Abstract An important question confronting feminist philosophers is why women are sometimes complicit in their own subordination. The dominant view holds that complicity is best understood in terms of adaptive preferences. This view assumes that agents will naturally gravitate away from subordination and towards flourishing as long as they do not have ...
Charlotte Knowles
wiley   +1 more source

Simulating weak lensing by large scale structure [PDF]

Astrophys.J.592:699-709,2003, 2003
We model weak gravitational lensing of light by large-scale structure using ray tracing through N-body simulations. The method is described with particular attention paid to numerical convergence. We investigate some of the key approximations in the multi-plane ray tracing algorithm. Our simulated shear and convergence maps are used to explore how well
arxiv   +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