Gravitational radiospectrometer
Astrophysics
2009-11-13 v2 General Relativity and Quantum Cosmology
Abstract
Gravitational lensing is predicted by general relativity and is found in observations. When a gravitating body is surrounded by a plasma, the lensing angle depends on a frequency of the electromagnetic wave due to refraction properties, and the dispersion properties of the light propagation in plasma. The last effect leads to dependence, even in the uniform plasma, of the lensing angle on the frequency, what resembles the properties of the refractive prism spectrometer. The strongest action of this spectrometer is for the frequencies slightly exceeding the plasma frequency, what corresponds to very long radiowaves.
Cite
@article{arxiv.0809.1021,
title = {Gravitational radiospectrometer},
author = {G. S. Bisnovatyi-Kogan and O. Yu. Tsupko},
journal= {arXiv preprint arXiv:0809.1021},
year = {2009}
}
Comments
11 pages, 2 figures