The pseudo phase-space density profile of clusters of galaxies

January 24 – 28, 2022

The structure of cosmological halos in phase-space holds clues on their formation and evolutionary processes. Numerical simulations have suggested that the pseudo phase-space density profile, Q≡ρ/σ^3, where ρ is the mass density and σ is the total velocity dispersion, follows a simple power-law in radius. Some observational studies have confirmed the expected theoretical behavior of Q(r) on the scale of galaxies and clusters of galaxies. In this project we plan to extend these observational studies to an unprecedentedly large number of 54 clusters, using the available WINGS data set. We will exploit the results of our dynamical analysis on this same data set that determined the mass and number density and velocity anisotropy profile of stacks of these 54 clusters with the MAMPOSSt algorithm.

Project proponent:

  • Andrea Biviano (INAF, Osservatorio Astronomico di Trieste)

List of participants:

  • Andrea Biviano (INAF, Osservatorio Astronomico di Trieste)
  • Gary Mamon (Institut d’Astrophysique de Paris)