An improved test of the strong equivalence principle with the pulsar in a triple star system

@article{Voisin2020AnIT,
  title={An improved test of the strong equivalence principle with the pulsar in a triple star system},
  author={Guillaume Voisin and Ismael Cognard and Paulo C. C. Freire and Norbert Wex and Lucas Guillemot and Gregory Desvignes and Michael Kramer and Gilles Theureau},
  journal={Astronomy \& Astrophysics},
  year={2020}
}
Context.The gravitational strong equivalence principle (SEP) is a cornerstone of the general theory of relativity (GR). Hence, testing the validity of SEP is of great importance when confronting GR, or its alternatives, with experimental data. Pulsars that are orbited by white dwarf companions provide an excellent laboratory, where the extreme difference in binding energy between neutron stars and white dwarfs allows for precision tests of the SEP via the technique of radio pulsar timing.Aims… 

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References

SHOWING 1-10 OF 108 REFERENCES

Testing relativity with laser ranging to the moon

THE PROBLEM OF MOTION IN NEWTONIAN AND EINSTEINIAN GRAVITY

General relativity verified by a triple-star system

  • C. Will
  • Physics, Education
    Nature
  • 2018
TLDR
A triple-star system provides a stringent test of the theory of gravity, based on the principle that all objects accelerate identically in an external gravitational field.

Gaia Data Release 2

Context. For Gaia DR2, 280 million spectra collected by the Radial Velocity Spectrometer instrument on board Gaia were processed, and median radial velocities were derived for 9.8 million sources

A&A proofs: manuscript

  • 2019

TEMPO2, a new pulsar-timing package - I. An overview

Contemporary pulsar-timing experiments have reached a sensitivity level where systematic errors introduced by existing analysis procedures are limiting the achievable science. We have developed

Schwerkraft und Weltall, Die Wissenschaft

  • International Journal of Theoretical Physics,
  • 1974

PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter

Neutron stars are not only of astrophysical interest, but are also of great interest to nuclear physicists because their attributes can be used to determine the properties of the dense matter in

A pulsar-based time-scale from the International Pulsar Timing Array

We have constructed a new time-scale, TT(IPTA16), based on observations of radio pulsars presented in the first data release from the International Pulsar Timing Array (IPTA). We used two analysis

Space test of the equivalence principle: first results of the MICROSCOPE mission

The weak equivalence principle (WEP), stating that two bodies of different compositions and/or mass fall at the same rate in a gravitational field (universality of free fall), is at the very
...