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 ($B$) pulsar (SMP). Unlike its GR counterpart, the photon dynamics in NLED leads to a new effective GL, which depends also on the $B$-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 $B$-field stars from their X-ray emission.

12(ws-ijmpa.cls) pages, 3 figures. Accepted for publication in IJMPA

References in corpus (3)

• Gravitational radiation from gamma-ray bursts as observational opportunities for LIGO and VIRGO
• Nonlinear electrodynamics and the gravitational redshift of highly magnetised neutron stars
• Nonlinear electrodynamics and the surface redshift of pulsars

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