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SZ and X-rays

Date: 4 juin 13:30 - 19:00

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Affichage9 contributions sur 9
Session: SZ and X-rays
The abundance of galaxy clusters, per unit of mass and redshift, is a very powerful tool in order to constrain cosmological parameters as the matter density Ωm, and the amplitude of the primordial fluctuation σ8. However, the cluster mass is not an observable. The multicomponent nature of galaxy clusters helps to bypass this problem. In fact, from the observation of each different cluster compon ... Plus
Présenté par Mr. Antonio FERRAGAMO on 4/6/2019 à 15:00
Session: SZ and X-rays
We present the dynamical properties and the individual spatially resolved radial mass profiles of a sample of 77 massive clusters in the [0.05-1] redshift range detected via the Sunyaev-Zel'dovich effect. For the 5 clusters at z>0.9, we present a method to study such objects that optimally exploits information from XMM-Newton and Chandra observations. The combination of Chandra’s excellent spa ... Plus
Présenté par Dr. Iacopo BARTALUCCI on 4/6/2019 à 14:00
Session: SZ and X-rays
The Sunyaev-Zeldovich effect provides an observational window to the intracluster medium complementary to X-ray observations, and over the last few years has proved to be a mature technique to efficiently detect and characterize galaxy clusters. For instance, the Planck survey has mapped the whole microwave sky, detecting almost 2000 candidate massive clusters up to z~1, performing the first all-s ... Plus
Présenté par Dr. Mariachiara ROSSETTI on 4/6/2019 à 14:30
Session: SZ and X-rays
High-resolution spectral imaging observations of the SZ effects promise to provide a vastly broaden view of structure and evolution of galaxy clusters, by enabling unique measurements of thermodynamic and kinematic properties of the cluster gas via thermal and kinematic SZ effects. One of the new frontiers includes the exploration of the extremely low-density regions in the outskirts of galaxy clu ... Plus
Présenté par Prof. Daisuke NAGAI on 4/6/2019 à 15:30
Session: SZ and X-rays
TBD
Présenté par Mr. Juan Francisco MACIAS-PEREZ on 4/6/2019 à 13:00
Session: SZ and X-rays
The imaging of galaxy clusters through the Sunyaev-Zel'dovich effect is a valuable tool to probe the thermal pressure of the intra-cluster gas especially in the outermost regions, where X-ray observations suffer from photon statistics. For the first time, we produce maps of the Comptonization parameter by applying a locally parametric algorithm for sparse component separation to the latest *P ... Plus
Présenté par Anna Silvia BALDI on 4/6/2019 à 12:30
Session: SZ and X-rays
X-ray and Sunyaev-Zeldovich observations provide independent and complementary ways of determining the properties of the intracluster medium (ICM). Joint reconstructions of galaxy cluster properties combining X-ray and SZ data are clearly superior to similar analyzes based on one observable only, since the two methods have a different radial dependency and probe different thermodynamic quantities. ... Plus
Présenté par Dr. Dominique ECKERT on 4/6/2019 à 12:00
Session: SZ and X-rays
The total mass of a galaxy cluster is one of its most fundamental properties. Together with the redshift, the mass links observation and theory, allowing us to use the cluster population to test models of structure formation and to constrain cosmological parameters. I summarise the state of the art in cluster mass estimation methods, with particular emphasis on SZ measurements and their combinatio ... Plus
Présenté par Dr. Gabriel PRATT
Session: SZ and X-rays
Galaxy clusters are dark-matter dominated systems enclosed in a volume that is a high-density microcosm of the rest of the universe. What is their true mass scale? What are the statistical properties of the representative population? How does their detectability depend on baryon physics? We have learned a lot on these fundamental questions with our current projects, like XMM-Newton Cluster Outsk ... Plus
Présenté par Dr. Stefano ETTORI on 4/6/2019 à 11:30
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