Einstein's gravitational lensing and nonlinear electrodynamics
Abstract
In 1936 Einstein predicted the phenomenon presently known as gravitational lensing (GL). A prime feature of GL is the magnification, because of the gravitational field, of the star visible surface as seen from a distant observer. We show here that nonlinear electrodynamics (NLED) modifies in a fundamental basis Einstein's general relativistic (GR) original derivation. The effect becomes apparent by studying the light propagation from a strongly magnetic () pulsar (SMP). Unlike its GR counterpart, the photon dynamics in NLED leads to a new effective GL, which depends also on the -field permeating the pulsar. The apparent radius of a SMP appears then unexpectedly diminished, by a large factor, as compared to the classical Einstein's prediction. This may prove very crucial in determining physical properties of high -field stars from their X-ray emission.
Cite
@article{arxiv.astro-ph/0408152,
title = {Einstein's gravitational lensing and nonlinear electrodynamics},
author = {Herman J. Mosquera Cuesta and Jose' A. de Freitas Pacheco and Jose' M. Salim},
journal= {arXiv preprint arXiv:astro-ph/0408152},
year = {2010}
}
Comments
12(ws-ijmpa.cls) pages, 3 figures. Accepted for publication in IJMPA