An influence of the matter distribution on the positional accuracy of reference sources
Abstract
We consider an influence of a non-stationary gravitational field of the Galaxy on the visible positions of extragalactic sources. A contribution of the baryonic component of the galactic matter as well as of the hidden matter (including a population of brown dwarfs) were took into account. The observed variations of the deflection angle of light rays in a gravitational field of randomly moving point-like masses can be considered as a stochastic process. Using such an approach we constructed an autocorrelation function of studied stochastic process and found that its relative changes are about 15% for one year and about 35% for ten years.
Keywords
Cite
@article{arxiv.1410.0353,
title = {An influence of the matter distribution on the positional accuracy of reference sources},
author = {T. I. Larchenkova and A. A. Lutovinov and N. S. Lyskova},
journal= {arXiv preprint arXiv:1410.0353},
year = {2014}
}
Comments
Proceedings of the 49th Rencontres de Moriond (Cosmology), Eds. E.Aug\'e, J. Dumarchez, J. Tr\^an Thanh V\^an, p.381