Constraining Hořava-Lifshitz gravity by weak and strong gravitational lensing

Zsolt Horváth, László Á. Gergely, Zoltán Keresztes, Tiberiu Harko, and Francisco S. N. Lobo
Phys. Rev. D 84, 083006 – Published 12 October 2011

Abstract

We discuss gravitational lensing in the Kehagias-Sfetsos space-time emerging in the framework of Hořava-Lifshitz gravity. In weak lensing, we show that there are three regimes, depending on the value of λ¯=1/ωd2, where ω is the Hořava-Lifshitz parameter and d characterizes the lensing geometry. When λ¯ is close to zero, light deflection typically produces two images, as in Schwarzschild lensing. For very large λ¯, the space-time approaches flatness, therefore there is only one undeflected image. In the intermediate range of λ¯, only the upper focused image is produced due to the existence of a maximal deflection angle δmax, a feature inexistent in the Schwarzschild weak lensing. We also discuss the location of Einstein rings, and determine the range of the Hořava-Lifshitz parameter compatible with present-day lensing observations. Finally, we analyze in the strong lensing regime the first two relativistic Einstein rings and determine the constraints on the parameter range to be imposed by forthcoming experiments.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 1 May 2011

DOI:https://doi.org/10.1103/PhysRevD.84.083006

© 2011 American Physical Society

Authors & Affiliations

Zsolt Horváth*, László Á. Gergely, and Zoltán Keresztes

  • Departments of Theoretical and Experimental Physics, University of Szeged, Dóm tér 9, Szeged 6720, Hungary

Tiberiu Harko§

  • Department of Physics and Center for Theoretical and Computational Physics, The University of Hong Kong, Pok Fu Lam Road, Hong Kong

Francisco S. N. Lobo

  • Centro de Astronomia e Astrofísica da Universidade de Lisboa, Campo Grande, Edifício C8 1749-016 Lisboa, Portugal

  • *zshorvath@titan.physx.u-szeged.hu
  • gergely@physx.u-szeged.hu
  • zkeresztes@titan.physx.u-szeged.hu
  • §harko@hkucc.hku.hk
  • flobo@cii.fc.ul.pt

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 84, Iss. 8 — 15 October 2011

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review D

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×