Observations of radio sources near the Sun
Abstract
Geodetic Very Long Baseline Interferometry (VLBI) data are capable of measuring the light deflection caused by the gravitational field of the Sun and large planets with high accuracy. The parameter of the parametrized Post-Newtonian (PPN) formalism estimated using observations of reference radio sources near the Sun should be equal to unity in the general relativity. We have run several VLBI experiments tracking reference radio sources from 1 to 3 degrees from the Sun. The best formal accuracy of the parameter achieved in the single-session mode is less than 0.01 percent, or better than the formal accuracy obtained with a global solution included all available observations at arbitrary elongation from the Sun. We are planning more experiments starting from 2020 using better observing conditions near the minimum of the Solar activity cycle.
Keywords
Cite
@article{arxiv.1908.00973,
title = {Observations of radio sources near the Sun},
author = {Oleg Titov and Sebastien Lambert and Benedikt Soja and Fengchun Shu and Alexei Melnikov and Jamie McCallum and Lucia McCallum and Matthias Schartner and Aletha de Witt and Dmitrii Ivanov and Andrei Mikhailov and Sang Oh Yi and Wen Chen and Bo Xia and Masafumi Ishigaki and Sergei Gulyaev and Tim Natusch and Stuart Weston},
journal= {arXiv preprint arXiv:1908.00973},
year = {2019}
}
Comments
Proceeding of the EVGA 2019 Meeting. arXiv admin note: substantial text overlap with arXiv:1806.11299