Relativistic gravitational experiments in SAI MSU

by Valentin. N. Rudenko (Sternberg Astronomical Institute Moscow)

Monday 19 Dec 2016, 16:00 → 17:00 Europe/Rome

Aula Conversi (Dip. di Fisica - Edificio G. Marconi)

Current status of two relativistic experiments carried out in SAI MSU is described. The first one is associated with the problem of enhancing of sensitivity of the opto-acoustic gravitational wave antenna OGRAN, installed in the underground facilities of Baksan Neutrino Observatory, is analyzed including the study and prototyping of cryogenics implementation. The second one is related to the task of frequency estimate of a quasi-harmonic signal from "Radioastron" satellite, approaching the problem of gravitational red shift effect. Generalized likelihood method applies in the compensation data processing algorithm using the one-way and two-ways communication modes with the satellite. Results of data processing in test runs are presented as a feasibility demonstration to achieve relative accuracy 0.0001 in red shift measurement over 20 minutes-long runs. Finally, the detection of very low frequency gravitational perturbations using Virgo interferometer will be discussed.