One pulsar, two white dwarfs, and a planet confirming the strong equivalence principle - Archive ouverte HAL
Communication Dans Un Congrès Année : 2022

One pulsar, two white dwarfs, and a planet confirming the strong equivalence principle

Guillaume Voisin
G Luth
  • Fonction : Auteur
I Cognard
  • Fonction : Auteur
P Freire
  • Fonction : Auteur
N Wex
  • Fonction : Auteur
L Guillemot
  • Fonction : Auteur
G Desvignes
  • Fonction : Auteur
M Kramer
  • Fonction : Auteur
G Theureau
  • Fonction : Auteur
M Saillenfest
  • Fonction : Auteur

Résumé

The strong equivalence principle is a cornerstone of general relativity, tested with exquisite accuracy in the Solar system. However, tests in the strong-field regime require a compact object. Currently, PSR J0337+1715 is the unique millisecond pulsar found in a triple stellar system, orbiting two white dwarfs within an area comparable to the orbit of the Earth. This configuration offers the opportunity for a dramatic improvement over previous tests, provided that accurate and regular timing of the pulsar can be achieved. This also requires the development of a new timing model solving numerically the relativistic three-body problem with great accuracy. We report on the analysis of the high-quality dataset gathered on PSR J0337+1715 by the Nançay radiotelescope over the past 8 years. In particular, I will show how we could obtain the most stringent limit to-date on a potential violation of the strong equivalent principle in the strong field regime. I will also introduce preliminary resuts showing that the presence of a small planet in the system may explain a tiny residual signal so far unaccounted for, which if confirmed would make this system exceptionally rich.
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Dates et versions

hal-03609770 , version 1 (18-05-2022)

Identifiants

Citer

Guillaume Voisin, G Luth, I Cognard, P Freire, N Wex, et al.. One pulsar, two white dwarfs, and a planet confirming the strong equivalence principle. 2022 Gravitation session of the 56th Rencontres de Moriond, Jan 2022, La Thuile, Italy. ⟨hal-03609770⟩
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