Strong gravitational lensing around Kehagias-Sfetsos compact objects surrounded by plasma
Authors
HENSH, Sudipta (356 India, belonging to the institution), Jan SCHEE (203 Czech Republic, belonging to the institution), Ahmadjon ABDUJABBAROV and Zdeněk STUCHLÍK (203 Czech Republic, belonging to the institution)
Edition
European Physical Journal Plus, DE - Spolková republika Německo, 2022, 2190-5444
We present the analysis how Horava gravity and plasma influence the strong lensing phenomena around Kehagias-Sfetsos (KS) black holes. Using the semi-analytical Bozza method of strong lensing limit, we determine the multiple images, namely their separation S, and magnification R. We apply our calculations to the case of supermassive black hole having mass M = 6.5x10(9)M(circle dot) and being at distance d(0) = 16.8Mpc from observer corresponding to those observed in M87. We show that the sensitivity of image magnification, image separation, and shadow angular size on KS parameter omega and plasma parameter k are of order from 1 to 10% for R and 16% for S.