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MICROSCOPE mission: first constraints on the violation of the weak equivalence principle by a light scalar dilaton
Joel Bergé, Philippe Brax, Gilles Métris +3
The existence of a light or massive scalar field with a coupling to matter weaker than gravitational strength is a possible source of violation of the weak equivalence principle. W…
The signal of the stochastic gravitational wave background and the angular correlation of its energy density
Giulia Cusin, Cyril Pitrou, Jean-Philippe Uzan
The gravitational wave radiation emitted by all, resolved and unresolved, astrophysical sources in the observable universe generates a stochastic background. This background has a…
Exploring stellar evolution with gravitational-wave observations
Irina Dvorkin, Jean-Philippe Uzan, Elisabeth Vangioni +1
Recent detections of gravitational waves from merging binary black holes opened new possibilities to study the evolution of massive stars and black hole formation. In particular, s…
Effects of axions on Population III stars
Arthur Choplin, Alain Coc, Georges Meynet +3
Following the renewed interest for axions as a dark matter component, we revisit the effects of energy loss by axion emission on the evolution of the first generation of stars. The…
Weak gravitational lensing of finite beams
Pierre Fleury, Julien Larena, Jean-Philippe Uzan
The standard theory of weak gravitational lensing relies on the infinitesimal light beam approximation. In this context, images are distorted by convergence and shear, the respecti…
Anisotropy of the astrophysical gravitational wave background: analytic expression of the angular power spectrum and correlation with cosmological observations
Giulia Cusin, Cyril Pitrou, Jean-Philippe Uzan
Unresolved and resolved sources of gravitational waves are at the origin of a stochastic gravitational wave background. While the computation of its mean density as a function of f…