RadioAstron gravitational redshift experiment: Status update
Paper i proceeding, 2018

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.

Spacecraft Doppler tracking

General relativity

Gravitational redshift

RadioAstron

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Publicerad i

14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings

s. 3569-3575
978-981322659-3 (ISBN)

Konferens

14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories
Rom, Italy, 2015-07-11 - 2015-07-17

Kategorisering

Ämneskategorier (SSIF 2011)

Rymd- och flygteknik

Medicinsk laboratorie- och mätteknik

Astronomi, astrofysik och kosmologi

Identifikatorer

DOI

10.1142/9789813226609_0463

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Senast uppdaterat

2022-03-02