Gravitational redshifts in electromagnetic bursts occuring near Schwarzschild horizon

Details Gravitational redshifts in electromagnetic bursts occuring near Schwarzschild horizon Gravitational redshifts in electromagnetic bursts occuring near Schwarzschild horizon

2002-11-29

arxiv.org/abs/gr-qc/0211104v1

Class.Quant.Grav. 20 (2003) 85-92

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, 2 figures. To appear in the Class. Q. Grav

Scientific paper

It was suggested earlier that the gravitational redshift formula can be invalid when the effect of the backscattering is strong. It is demonstrated here numerically, for an exemplary electromagnetic pulse that is: i) initially located very close to the horizon of a Schwarzschild black hole and ii) strongly backscattered, that a mean frequency does not obey the standard redshift formula. Redshifts appear to depend on the frequency and there manifests a backscatter-induced blueshift in the outgoing radiation.

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