skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Kerr-Sen dilaton-axion black hole lensing in the strong deflection limit

Abstract

In the present work we study numerically quasiequatorial lensing by the charged, stationary, axially symmetric Kerr-Sen dilaton-axion black hole in the strong deflection limit. In this approximation we compute the magnification and the positions of the relativistic images. The most outstanding effect is that the Kerr-Sen black hole caustics drift away from the optical axis and shift in the clockwise direction with respect to the Kerr caustics. The intersections of the critical curves on the equatorial plane as a function of the black hole angular momentum are found, and it is shown that they decrease with the increase of the parameter Q{sup 2}/M. All of the lensing quantities are compared to particular cases as Schwarzschild, Kerr, and Gibbons-Maeda black holes.

Authors:
;  [1]
  1. Department of Theoretical Physics, Faculty of Physics, Sofia University, 5 James Bourchier Boulevard, 1164 Sofia (Bulgaria)
Publication Date:
OSTI Identifier:
20935201
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevD.75.023006; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANGULAR MOMENTUM; APPROXIMATIONS; AXIAL SYMMETRY; AXIONS; BLACK HOLES; KERR FIELD; RELATIVISTIC RANGE

Citation Formats

Gyulchev, Galin N., and Yazadjiev, Stoytcho S.. Kerr-Sen dilaton-axion black hole lensing in the strong deflection limit. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.023006.
Gyulchev, Galin N., & Yazadjiev, Stoytcho S.. Kerr-Sen dilaton-axion black hole lensing in the strong deflection limit. United States. doi:10.1103/PHYSREVD.75.023006.
Gyulchev, Galin N., and Yazadjiev, Stoytcho S.. Mon . "Kerr-Sen dilaton-axion black hole lensing in the strong deflection limit". United States. doi:10.1103/PHYSREVD.75.023006.
@article{osti_20935201,
title = {Kerr-Sen dilaton-axion black hole lensing in the strong deflection limit},
author = {Gyulchev, Galin N. and Yazadjiev, Stoytcho S.},
abstractNote = {In the present work we study numerically quasiequatorial lensing by the charged, stationary, axially symmetric Kerr-Sen dilaton-axion black hole in the strong deflection limit. In this approximation we compute the magnification and the positions of the relativistic images. The most outstanding effect is that the Kerr-Sen black hole caustics drift away from the optical axis and shift in the clockwise direction with respect to the Kerr caustics. The intersections of the critical curves on the equatorial plane as a function of the black hole angular momentum are found, and it is shown that they decrease with the increase of the parameter Q{sup 2}/M. All of the lensing quantities are compared to particular cases as Schwarzschild, Kerr, and Gibbons-Maeda black holes.},
doi = {10.1103/PHYSREVD.75.023006},
journal = {Physical Review. D, Particles Fields},
number = 2,
volume = 75,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}