TY - JOUR
T1 - Weak gravitational lensing by Kerr-MOG black hole and Gauss–Bonnet theorem
AU - OVGUN, ALI
AU - Sakallı, İzzet
AU - SAAVEDRA ALVEAR, JOEL FRANCISCO
N1 - Publisher Copyright:
© 2019 Elsevier Inc.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/12
Y1 - 2019/12
N2 - The deflection angle of Kerr-MOG black holes is studied for different values of the parameter in modified gravity (MOG). To this end, we employ the Gauss–Bonnet theorem, which was first studied by Gibbons and Werner and then extended by Ono, Ishihara and Asada, who use a generalized optical metric where the deflection of light for an observer and source at finite distance. By using this method, we study the weak gravitational lensing by Kerr-MOG black hole. Our computations show that with an increase in the MOG parameter (α), the deflection angle becomes significantly larger than that of Kerr black hole. The results obtained show that MOG effect could be taken into account in the gravitational lensing experiments.
AB - The deflection angle of Kerr-MOG black holes is studied for different values of the parameter in modified gravity (MOG). To this end, we employ the Gauss–Bonnet theorem, which was first studied by Gibbons and Werner and then extended by Ono, Ishihara and Asada, who use a generalized optical metric where the deflection of light for an observer and source at finite distance. By using this method, we study the weak gravitational lensing by Kerr-MOG black hole. Our computations show that with an increase in the MOG parameter (α), the deflection angle becomes significantly larger than that of Kerr black hole. The results obtained show that MOG effect could be taken into account in the gravitational lensing experiments.
KW - Black hole
KW - Gauss–Bonnet theorem
KW - Gravitational lensing
KW - Light deflection
UR - http://www.scopus.com/inward/record.url?scp=85073949901&partnerID=8YFLogxK
U2 - 10.1016/j.aop.2019.167978
DO - 10.1016/j.aop.2019.167978
M3 - Article
AN - SCOPUS:85073949901
VL - 411
JO - Annals of Physics
JF - Annals of Physics
SN - 0003-4916
M1 - 167978
ER -