Universality of free fall versus ephemeris

Olivier Minazzoli (1) , Léo Bernus (2, 3, 4, 5, 6, 7, 8, 9) , Agnès Fienga (3, 8, 9) , Aurélien Hees , Jacques Laskar (2, 5, 4, 6, 7) , Vishnu Viswanathan (3, 5, 8, 9)

1 ARTEMIS - Astrophysique Relativiste Théories Expériences Métrologie Instrumentation Signaux
2 IMCCE - Institut de Mécanique Céleste et de Calcul des Ephémérides
3 GEOAZUR 7329 - Géoazur
4 OP - Observatoire de Paris - Site de Paris
5 CNRS - Centre National de la Recherche Scientifique
6 PSL - Université Paris Sciences et Lettres
7 UPMC - Université Pierre et Marie Curie - Paris 6
8 OCA - Observatoire de la Côte d'Azur
9 Département de Mathématiques [Nice]

When a light scalar field with gravitational strength interacts with matter, the weak equivalence principle is in general violated, leading for instance to a violation of the universality of free fall. This has been known and tested for a while. However, recent developments [Minazzoli & Hees, PRD 2016] showed that a novel manifestation of the universality of free fall can appear in some models. Here we discuss this new scenario and expose how we intend to constrain it with INPOP ephemeris.

Domaines: Relativité Générale et Cosmologie Quantique [gr-qc]

Olivier Minazzoli, Léo Bernus, Agnès Fienga, Aurélien Hees, Jacques Laskar, et al.. Universality of free fall versus ephemeris. 52nd Rencontres de Moriond on Gravitation, Mar 2017, La Thuile, Italy. pp.101-104. ⟨hal-01768081⟩