Results 1 to 10 of about 32,743 (208)

Strong Gravitational Lensing with SKA [PDF]

New Astronomy Reviews, 2004
The advent of new observational facilities in the last two decades has allowed the rapid discovery and high-resolution optical imaging of many strong lens systems from galaxy to cluster scales, as well as their spectroscopic follow-up.
Browne, I.W.A. Browne, L.V.E. Koopmans, Myers, N.J. Jackson, Schneider   +5 more
core   +4 more sources

Strong Gravitational Lensing by Sgr A* [PDF]

Classical and Quantum Gravity, 2010
In recent years, there has been increasing recognition of the potential of the galactic center as a probe of general relativity in the strong field. There is almost certainly a black hole at Sgr A* in the galactic center, and this would allow us the ...
Amitai Y Bin-Nun, Bin-Nun A Y, Bozza V, Bozza V, Bozza V, Eiroa E F Sendra C M, Ghez A M, Gillessen S, Holz D E, Misner C W, Schneider P, Wambsganss J, Whisker R   +12 more
core   +2 more sources

Strong gravitational lensing by wormholes [PDF]

Journal of Cosmology and Astroparticle Physics, 2019
We study strong gravitational lensing by a class of static wormhole geometries. Analytical approaches to the same are developed, and the results differ substantially from strong lensing by black holes, first reported by Bozza.
Banerjee, Pritam, Paul, Suvankar, Sarkar, Tapobrata, Shaikh, Rajibul   +3 more
core   +2 more sources

Simulations of Strong Gravitational Lensing with Substructure [PDF]

Monthly Notices of the Royal Astronomical Society, 2006
Galactic sized gravitational lenses are simulated by combining a cosmological N-body simulation and models for the baryonic component of the galaxy.
Amara, Adam, Cox, Thomas J., Metcalf, R. Benton, Ostriker, Jeremiah P.   +3 more
core   +4 more sources

Strong Gravitational Lensing by Kiselev Black Hole [PDF]

Physical Review D, 2015
We investigate the gravitational lensing scenario due to Schwarzschild-like black hole surrounded by quintessence (Kiselev black hole). We work for the special case of Kiselev black hole where we take the state parameter $w_{q}=-\frac{2}{3}$.
Bahamonde, Sebastian, Hussain, Saqib, Jamil, Mubasher, Younas, Azka   +3 more
core   +6 more sources

Shadows and strong gravitational lensing: a brief review

General Relativity and Gravitation, 2018
For ultra compact objects (UCOs), Light Rings (LRs) and Fundamental Photon Orbits (FPOs) play a pivotal role in the theoretical analysis of strong gravitational lensing effects, and of BH shadows in particular.
Pedro V P Cunha, Carlos A R Herdeiro
exaly   +3 more sources

Strong Gravitational Lensing and Dark Energy Complementarity [PDF]

Physical Review D, 2004
In the search for the nature of dark energy most cosmological probes measure simple functions of the expansion rate. While powerful, these all involve roughly the same dependence on the dark energy equation of state parameters, with anticorrelation ...
A. Cooray, A. Goobar, A.N. Davis, B.A. Bassett, C. Alcock, C.P. Ma, D.E. Holz, E.V. Linder, E.V. Linder, E.V. Linder, E.V. Linder, E.V. Linder, E.V. Linder, E.V. Linder, Eric V. Linder, G.F. Lewis, G.M. Bernstein, H-J. Seo, I.M.H. Etherington, J.A. Frieman, K. Yamamoto, M. Kuhlen, M. Oguri, M. Oguri, M. Takada, N. Dalal, N. Sarbu, R. Davé, R.C. Tolman   +28 more
core   +4 more sources

Strong Gravitational Lensing with Gauss-Bonnet correction [PDF]

Journal of Cosmology and Astroparticle Physics, 2014
In this paper we investigate the strong gravitational lensing with Gauss-Bonnet gravity. By considering the logarithmic term for deflection angle, we obtain the deflection angle $\hat\alpha$ and corresponding parameters $\bar{a}$ and $\bar{b}$.
Sadeghi, J., Vaez, H.
core   +2 more sources

Gravitational lensing in the strong field limit [PDF]

Physical Review D, 2002
We provide an analytic method to discriminate among different types of black holes on the ground of their strong field gravitational lensing properties.
A. Einstein, A. Janis, B. Carter, C.-M. Claudel, D. Richstone, E. F. Eiroa, H. Falcke, K. S. Virbhadra, K. S. Virbhadra, M. Wyman, R. Gautreau, S. Frittelli, S. U. Viergutz, V. Bozza, V. Bozza   +14 more
core   +4 more sources

Strong Gravitational Lensing and Its Cosmic Constraints [PDF]

Modern Physics Letters A, 2013
In this paper, we propose a new method to use the strong lensing data sets to constrain a cosmological model. By taking the ratio $\mathcal{D}^{obs}_{ij}=\theta_{\mathrm{E_{\mathrm{i}}}}\sigma_{\mathrm{0_{\mathrm{j}}}}^2/\theta_{\mathrm{E_{\mathrm{j ...
Wang, Nannan, Xu, Lixin
core   +2 more sources