Extrasolar planets as a probe of modified gravity

Abstract

We propose a new method to test modified gravity theories, taking advantage of the available data on extrasolar planets. We computed the deviations from the Kepler third law and use that to constrain gravity theories beyond General Relativity. We investigate gravity models which incorporate three screening mechanisms: the Chameleon, the Symmetron and the Vainshtein. We find that data from exoplanets orbits are very sensitive to the screening mechanisms putting strong constraints in the parameter space for the Chameleon models and the Symmetron, complementary and competitive to other methods, like interferometers and solar system. With the constraints on Vainshtein we are able to work beyond the hypothesis that the crossover scale is of the same order of magnitude than the Hubble radius $r_c\sim H_0^{-1}$, which makes the screening work automatically, testing how strong this hypothesis is and the viability of other scales.

7 pages, 5 figures, Published in Physics Letters B

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• Beyond the Cosmological Standard Model
• Atom-interferometry constraints on dark energy
• The Exoplanet Orbit Database II: Updates to exoplanets.org
• Efficient fitting of multiplanet Keplerian models to radial velocity and astrometry data
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• Detecting Chameleons through Casimir Force Measurements
• Constraining Dark Energy Anisotropic Stress
• Atomic Precision Tests and Light Scalar Couplings
• Chameleon dark energy models with characteristic signatures
• Astrophysical Tests of Modified Gravity: Stellar and Gaseous Rotation Curves in Dwarf Galaxies
• Les Houches Lectures on Physics Beyond the Standard Model of Cosmology

Cited by in corpus (9)

• Direct detection of dark energy: the XENON1T excess and future prospects
• Constraining symmetron fields with atom interferometry
• Screening mechanisms in hybrid metric-Palatini gravity
• Metric-affine gravity effects on terrestrial (exo-)planets profiles
• Probing a $r^{-n}$ modification of the Newtonian potential with Exoplanets
• Non-homogeneous exoplanets in metric-affine gravity
• Post-Newtonian effects on some characteristic timescales of transiting exoplanets
• When the anomalistic, draconitic and sidereal orbital periods do not coincide: the impact of post-Keplerian perturbing accelerations
• Red Giant evolution in Modified Gravity