9 papers
Repulsive dark matter from Hosotani mechanism
Philippe Brax, Patrick Valageas
We build an ultralight dark matter model with repulsive self-interactions, starting from a 5D action that only includes a gauge field and several massive and charged free fe…
Burgers dynamics for Poisson point process initial conditions of the Weibull class
Patrick Valageas
We derive the statistical properties of one-dimensional Burgers dynamics with stochastic initial conditions for the velocity potential defined by a Poisson point process whose inte…
Euclid preparation. Review of forecast constraints on dark energy and modified gravity
Euclid Collaboration, N. Frusciante, M. Martinelli +326
The Euclid mission has been designed to provide, as one of its main deliverables, information on the nature of the gravitational interaction, which determines the expansion of the…
Burgers dynamics for Poisson point process initial conditions
Patrick Valageas
We investigate the statistical properties of one-dimensional Burgers dynamics evolving from stochastic initial conditions defined by a Poisson point process for the velocity potent…
Testing scalar dark matter clumps with Pulsar Timing Arrays
Philippe Brax, Patrick Valageas
Scalar dark matter is a viable alternative to particle dark matter models such as Weakly Interacting Massive Particles (WIMPS). This is particularly the case for scalars with a low…
3D Vortices and rotating solitons in ultralight dark matter
Ph. Brax, P. Valageas
We study the formation and the dynamics of vortex lines in rotating scalar dark matter halos, focusing on models with quartic repulsive self-interactions. In the nonrelativistic re…