Proposal for a Real-Time Detection of our Acceleration through Space

Julien Bel and Christian Marinoni
Phys. Rev. Lett. 121, 021101 – Published 9 July 2018

Abstract

Our proper acceleration with respect to the cosmic microwave background results in a real-time change of the angular position of distant extragalactic sources. The cosmological component of this aberration drift signal, the noninertial motion generated by the large-scale distribution of matter, can, in principle, be detected by future high-precision astrometric experiments. It will provide interesting consistency tests of the standard model of cosmology, set independent constraints on the amplitude of the Hubble constant and the linear growth rate of cosmic structures, and be instrumental in searching for evidence of new physics beyond the standard model. We present the formalism of this novel cosmological test, discuss the physics to which it is sensitive, and show simulated forecasts of the accuracy with which it can be implemented.

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  • Received 22 November 2017
  • Revised 5 February 2018

DOI:https://doi.org/10.1103/PhysRevLett.121.021101

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Julien Bel and Christian Marinoni

  • Aix Marseille Univ, Université de Toulon, CNRS, CPT, Marseille, France

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Issue

Vol. 121, Iss. 2 — 13 July 2018

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