Observing the millimeter Universe with the NIKA2 camera

Session

Cluster cosmology

6 juin 2019, 09:00

44. The MUSIC of Galaxy Clusters: A database of synthetic clusters from cosmological hydrodynamical simulations

Prof. Gustavo Yepes (Universidad autónoma de Madrid)

06/06/2019 09:00

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...

47. Confirmation of NIKA2 investigation of the Sunyaev-Zel'dovich effect by using synthetic clusters of galaxies

Prof. Marco De Petris (Dept. of Physics - University La Sapienza)

06/06/2019 09:30

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...

8. Implication of an evolution of the mean pressure profile of galaxy clusters on the cosmological parameters estimated from the Planck tSZ power spectrum

Dr Florian Ruppin (MIT)

06/06/2019 10:00

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...

33. Cosmological constraints from the thermal Sunyaev Zeldovich power spectrum and cluster counts

Dr Boris Bolliet (The University of Manchester)

06/06/2019 10:30

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...

14. X-Ray and Microwave Cosmology: synergy and competition - What we expect from SRG/eRosita spacecraft and ground based microwave telescopes?

Prof. Rashid Sunyaev (Max Planck Garching)

06/06/2019 11:30

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 ...