2014/10/31 by Carlos A. Benavides, Alejandro Cárdenas-Avendaño, Alejandro Cardenas-Avendano +1 · 7 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Conformal map #Cosmology and Gravitation Theories #Gravitation #Gravitational field #Gravitational lens #Heterotic string theory #Limit (mathematics) #Pulsars and Gravitational Waves Research #Scalar field #Strong gravitational lensing #gr-qc
paper · pdf · doi:10.1007/s10773-015-2861-2
published in International Journal of Theoretical Physics 55(4), 2219-2236 (Springer Science+Business Media) · v3: 18 pages, 5 figures, references and an Appendix added
arxiv created 2015/10/19 · openalex publication_date 2015/11/17 · arxiv updated 2016/03/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this paper we calculate the strong field limit deflection angle for a light ray passing near a scalar charged spherically symmetric object, described by a metric which comes from the low-energy limit of heterotic string theory. Then, we compare the expansion parameters of our results with those obtained in the Einstein's canonical frame, obtained by a conformal transformation, and we show that, at least at first order, the results do not agree.