4 papers
The kinematic cosmic dipole beyond Ellis and Baldwin
Albert Bonnefous
The cosmic dipole anomaly, currently detected at a significance exceeding 5 in several independent survey poses a significant challenge to the standard model of cosmology. The E…
Weak Lensing Low Multipoles
Albert Bonnefous, Roya Mohayaee
We analyse the low--multipole components of the weak-lensing convergence field in a FLRW universe. The low--multipole convergence field, encodes the largest-angle coherent potentia…
Monge-Ampère gravity, optimal transport theory and their link to the Galileons
Albert Bonnefous, Yann Brenier, Roya Mohayaee
Mathematicians have been proposing for sometimes that Monge-Ampère equation, a nonlinear generalization of the Poisson equation, where trace of the Hessian is replaced by its deter…
Velocity recostruction with graph neural networks
Hideki Tanimura, Albert Bonnefous, Jia Liu +1
In this work, we seek to improve the velocity reconstruction of clusters by using Graph Neural Networks -- a type of deep neural network designed to analyze sparse, unstructured da…