publication . Preprint . Article . 2015

Galaxy cluster constraints on the coupling to photons of low-mass scalars

Philippe Brax; Pierre Brun; Denis Wouters;
Open Access English
  • Published: 02 Oct 2015
Abstract
We consider a broad class of interactions between radiation and a light scalar field, including both conformal and disformal couplings. Such a scalar field potentially acts on cosmological scales as dark energy and could also appear in modified gravity theories. We study the consequences of these couplings on the mixing between the scalar field and photons in galaxy clusters in the presence of a magnetic field. In particular we focus on the resulting turbulence-induced irregularities in the X-ray and UV bands. We find new bounds on the photon-to-scalar couplings, both conformal and disformal, which complement laboratory experiments and other astrophysical constr...
Subjects
arXiv: General Relativity and Quantum Cosmology
free text keywords: Astrophysics - High Energy Astrophysical Phenomena, High Energy Physics - Phenomenology, Particle physics, Coupling, Photon, Dark energy, Magnetic field, Scalar field, Scalar (mathematics), Physics, Cosmology, Galaxy cluster
Related Organizations
Funded by
EC| INVISIBLES
Project
INVISIBLES
INVISIBLES
  • Funder: European Commission (EC)
  • Project Code: 289442
  • Funding stream: FP7 | SP3 | PEOPLE
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