학술논문
RadioAstron gravitational redshift experiment: status update
Document Type
Working Paper
Author
Litvinov, D. A.; Bach, U.; Bartel, N.; Belousov, K. G.; Bietenholz, M.; Biriukov, A. V.; Cimo, G.; Duev, D. A.; Gurvits, L. I.; Gusev, A. V.; Haas, R.; Kauts, V. L.; Kanevsky, B. Z.; Kovalenko, A. V.; Kronschnabl, G.; Kulagin, V. V.; Lindqvist, M.; Calves, G. Molera; Neidhardt, A.; Ploetz, C.; Pogrebenko, S. V.; Porayko, N. K.; Rudenko, V. N.; Smirnov, A. I.; Sokolovsky, K. V.; Stepanyants, V. A.; Yang, J.; Zakhvatkin, M. V.
Source
Subject
Language
Abstract
A test of a cornerstone of general relativity, the gravitational redshift effect, is currently being conducted with the RadioAstron spacecraft, which is on a highly eccentric orbit around Earth. Using ground radio telescopes to record the spacecraft signal, synchronized to its ultra-stable on-board H-maser, we can probe the varying flow of time on board with unprecedented accuracy. The observations performed so far, currently being analyzed, have already allowed us to measure the effect with a relative accuracy of $4\times10^{-4}$. We expect to reach $2.5\times10^{-5}$ with additional observations in 2016, an improvement of almost a magnitude over the 40-year old result of the GP-A mission.
Comment: Submitted to the 14th Marcel Grossmann Meeting Proceedings
Comment: Submitted to the 14th Marcel Grossmann Meeting Proceedings