Title
RadioAstron gravitational redshift experiment: status update
Author
Litvinov, D.A. (Moscow State University; Lebedev Physical Institute)
Bach, U. (Max-Planck-Institute for Radio Astronomy)
Bartel, N. (University of York)
Belousov, K.G. (Lebedev Physical Institute)
Bietenholz, M. (University of York; Hartebeesthoek Radio Astronomy Observatory)
Biriukov, A.V. (Lebedev Physical Institute)
Cimo, G (Joint Institute for VLBI ERIC; Netherlands Institute for Radio Astronomy (ASTRON))
Duev, D. A. (Moscow State University; California Institute of Technology)
Gurvits, L. (TU Delft Astrodynamics & Space Missions; Joint Institute for VLBI ERIC) 
Gusev, A.V. (Moscow State University)
Haas, R (Chalmers University of Technology)
Kauts, V.L. (Lebedev Physical Institute; Moscow State University)
Kanevsky, B.Z. (Lebedev Physical Institute)
Kovalenko, A.V. (Pushchino Radio Astronomy Observatory)
Kronschnabl, G (Federal Agency for Cartography and Geodesy)
Kulagin, V.V. (Moscow State University)
Lindqvist, Maria (Chalmers University of Technology)
Molera Calves, G (Joint Institute for VLBI ERIC; Aalto University)
Neidhardt, A. (Technische Universität München)
Plotz, C. (Federal Agency for Cartography and Geodesy)
Pogrebenko, S. V. (Joint Institute for VLBI ERIC)
Porayko, N.K. (Moscow State University; Max-Planck-Institute for Radio Astronomy)
Rudenko, V.N. (Moscow State University)
Sokolovsky, K. V. (Lebedev Physical Institute; Moscow State University)
Smirnov, A.I. (Lebedev Physical Institute)
Stepanyants, V.A. (Russian Academy of Sciences)
Yang, J. (Chalmers University of Technology)
Zakhvatkin, M.V. (Russian Academy of Sciences)
Contributor
Bianchi, M. (editor)
Jantzen, R.T. (editor)
Ruffini, R. (editor)
Date
2016-03-20
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 × 10−4 . We expect to reach 2.5×10−5 with additional observations in 2016, an improvement of almost a magnitude over the 40-year old result of the GP-A mission.
Subject
galaxies: active
galaxies: jets
quasars: individual (3C273)
radio continuum: galaxies
techniques: interferometric
To reference this document use:
http://resolver.tudelft.nl/uuid:f1e2875d-388e-4cab-a4c4-fc4c9cd36b40
Source
Proceedings of the Fourteenth Marcel Grossman Meeting on General Relativity
Event
14th Marcel Grossmann Meeting, 2015-07-12 → 2015-07-18, Rome, Italy
Part of collection
Institutional Repository
Document type
conference paper
Rights
© 2016 D.A. Litvinov, U. Bach, N. Bartel, K.G. Belousov, M. Bietenholz, A.V. Biriukov, G Cimo, D. A. Duev, L. Gurvits, A.V. Gusev, R Haas, V.L. Kauts, B.Z. Kanevsky, A.V. Kovalenko, G Kronschnabl, V.V. Kulagin, Maria Lindqvist, G Molera Calves, A. Neidhardt, C. Plotz, S. V. Pogrebenko, N.K. Porayko, V.N. Rudenko, K. V. Sokolovsky, A.I. Smirnov, V.A. Stepanyants, J. Yang, M.V. Zakhvatkin