Conveners
Tuesday P2
- Laura Salvati (IAS, Paris-Saclay)
Tuesday P2
- Florian Ruppin (IP2I)
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Inigo Zubeldia (University of Cambridge)27/06/2023, 13:50
As demonstrated by Planck, ACT, and SPT, the abundance of tSZ-detected galaxy clusters across mass and redshift is a powerful cosmological probe. The upcoming Simons Observatory (SO) will lead to the detection of about 20 000 clusters, an order of magnitude more objects than what previous experiments found, thereby providing an unprecedented constraining potential. However, in order for this...
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Jyothis Chandran (IFCA, Universida de Cantabria)27/06/2023, 14:15
An all-sky map of the thermal Sunyaev-Zeldovich (SZ) effect has been publicly released by the Planck Collaboration in 2015, using a Needlet Internal Linear Combination (NILC) component separation method on Planck PR2 data. The quality of the Planck data has improved since then. The Planck PR4 data release provides full-sky maps in LFI and HFI frequency bands with improved systematics and...
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Gaspard Aymerich (Institut d'Astrophysique Spatiale, Université Paris-Saclay)27/06/2023, 14:35
Galaxy clusters are a powerful cosmological probe: they track the latest evolution of large scale structure and are therefore fundamental for testing the cosmological model in the recent Universe. To compare the observations of galaxy clusters with the theoretical prediction and thus constrain the cosmological parameters of the underlying model, a precise knowledge of clusters’ masses and...
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Federico De Luca (Università degli Studi di Roma Tor Vergata)27/06/2023, 14:55
Assuming spherical symmetry, joint X-ray and millimetre observations of galaxy cluster atmospheres allow us to measure intra-cluster distances. Using XMM-Newton and Planck observations of CHEX-MATE galaxy clusters, we investigate the relationship between X-ray and X-ray+mm inferences of cluster temperature profiles. The average ratio between X-ray and X-ray+mm temperatures,...
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Raven Gassis (University of Cincinnati)27/06/2023, 15:15
Strong lensing galaxy clusters provide a powerful observational test of Cold Dark Matter (CDM) structure predictions derived from simulation. Specifically, the shape and relative alignments of the dark matter halo, stars, and hot intracluster gas tells us the extent to which theoretical structure predictions hold for clusters in various dynamical states. We measure the position angles,...
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Emily Silich (Caltech)27/06/2023, 15:35
Galaxy clusters represent the current stage of cosmological structure formation, and major mergers are central to the growth of these objects. Studies of merger dynamics can therefore test the paradigm of hierarchical structure formation in the universe over cosmic time. We have assembled a set of deep, multi-wavelength data (X-ray, SZ, and optical) for a sample of 8 galaxy clusters, 7 of...
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Daniel de Andres Hernandez (Universidad Autonoma de Madrid)27/06/2023, 16:40
In our previews works, deep learning techniques have succeeded in estimating galaxy cluster masses in observations of Sunyaev Zel'dovich maps, e.g. in the Planck PSZ2 catalog and mass radial profiles from SZ mock maps. In the next step, we explore inferring 2D mass density from mock observations of SZ, X-ray and stars using THE THREE HUNDRED (The300) cosmological simulation. In order to do...
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Alice Moyer (LPSC IN2P3)27/06/2023, 17:00
In Sunyaev Zeldovich (SZ) cluster cosmology, one of the main parameter of interest is cluster mass. It is needed to constrain cosmological parameters through the cluster number count. As the mass is not an observable, a scaling relation is needed to link cluster masses to the integrated Compton parameters Y, i.e the SZ observable.
Current cosmological results use the Planck scaling...
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Corentin Hanser27/06/2023, 17:20
As the largest gravitationally bound objects in the Universe, galaxy clusters are key tools to study large-scale structure formation processes and to constrain cosmological models. These studies, however, require a precise characterization of cosmological tools such as a mass-observable scaling relation and a mean electronic pressure profile. Systematic effects, in particular at high redshift,...
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