Speaker
Aurelien Valade
(IP2I/AIP)
Description
Our goal is to recover the linear peculiar velocity and density field from observations of galaxy peculiar velocities, specifically the Cosmicflows3 catalog. Our efforts are focused on attempting to recover the posterior probability function of the peculiar velocity field according to the ΛCDM model. By assuming the priors of the Λ CDM model we use a Hamiltonian Monte Carlo technique to sample from the posterior probability function in order to recover the linear peculiar velocity field and the corresponding cosmographic density field.
