Accueil > Timetable > Session details
PDF | iCal

Cluster cosmology

Date: 6 juin 09:00 - 12:30

Ordre du jour | Liste des présentations

Affichage5 contributions sur 5
The NIKA2 Sunyaev-Zel'dovich Large Program (LPSZ) is focused on mapping the thermal SZ signal of a representative sample of selected Planck and ACT clusters spanning the redshift range 0.5 < z < 0.9. Clusters science implementation to Cosmology can be biased due to inaccurate knowledge of IntraCluster Medium (ICM) pressure profiles in shape, scatter and redshift evolution. Hydrodynamical N-body s ... Plus
Présenté par Prof. Marco DE PETRIS on 6/6/2019 à 7:30
In this talk we review the formalism for the modelling of the Sunyaev Zeldovich (SZ) power spectrum and cluster counts and how to compare them with observations. We outline their dependencies on cosmological parameters, as well as the mass bias associated with the X-ray calibration of the cluster masses. We outline the role played by the pressure profile of the intra cluster medium, for which N ... Plus
Présenté par Dr. Boris BOLLIET on 6/6/2019 à 8:30
Most recent studies show that the tension observed between the cosmological constraints based on cluster abundance from SZ catalogs and from CMB primary anisotropies can be cancelled by a variation of the hydrostatic bias parameter. However, the value of the hydrostatic bias needed in order to alleviate this tension is in strong disagreement with the current estimates of this parameter based on le ... Plus
Présenté par Dr. Florian RUPPIN on 6/6/2019 à 8:00
Galaxy clusters are the most massive gravitationally collapsed objects in the Universe. They are also the most rare objects and, therefore, large computational volumes have to be simulated if one wants to obtain a statistical significant sample of such objects that can be used to calibrate the global scaling relations, or to understand the possible mass biases due to inaccuracies of the classica ... Plus
Présenté par Prof. Gustavo YEPES on 6/6/2019 à 7:00
Our Universe is filled by cosmic microwave background radiation (CMB) which is extremely isotropic and has excellent black body spectrum with temperature 2.7 Kelvin and no spectral deviations from black body are detected in the CMB monopole till now. But 50 years ago it was recognised that "shadows" in the angular distribution of CMB in the directions where clouds of very hot T_e~10^6-10^ ... Plus
Présenté par Prof. Rashid SUNYAEV on 6/6/2019 à 9:30
Mise en place de l'ordre du jour...