https://doi.org/10.1140/epjc/s10052-019-7034-7
Regular Article - Theoretical Physics
Gravitational lensing around Kehagias–Sfetsos compact objects surrounded by plasma
1
Institute of Physics and Research Centre of Theoretical Physics and Astrophysics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo náměstí 13, 74601, Opava, Czech Republic
2
Center for Field Theory and Particle Physics and Department of Physics, Fudan University, Shanghai, 200438, China
3
Ulugh Beg Astronomical Institute, Astronomicheskaya 33, Tashkent, 100052, Uzbekistan
* e-mail: f170656@fpf.slu.cz
** e-mail: sudiptahensh2009@gmail.com
Received:
5
April
2019
Accepted:
9
June
2019
Published online:
21
June
2019
We study the optical properties of the Kehagias–Sfetsos (KS) compact objects, characterized by the “Hořava” parameter 
, in the presence of plasma, considering its homogeneous or power-law density distribution. The strong effects of both “Hořava” parameter and plasma on the shadow cast by the KS compact objects are demonstrated. Using the weak field approximation, we investigate the gravitational lensing effect. Strong dependence of the deflection angle of the light on both the “Hořava” and plasma parameter is explicitly shown. The magnification of image source due to the weak gravitational lensing is given for both the homogeneous and inhomogeneous plasma.
© The Author(s), 2019
