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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
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Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29562
Title: Deriving the Hubble constant using Planck and XMM-Newton observations of galaxy clusters
Authors: Kozmanyan, Arpine
Bourdin, Hervé
Mazzotta, Pasquale
RASIA, ELENA 
Sereno, Mauro 
Issue Date: 2019
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 621
First Page: A34
Abstract: The possibility of determining the value of the Hubble constant using observations of galaxy clusters in X-ray and microwave wavelengths through the Sunyaev Zel'dovich (SZ) effect has long been known. Previous measurements have been plagued by relatively large errors in the observational data and severe biases induced, for example, by cluster triaxiality and clumpiness. The advent of Planck allows us to map the Compton parameter y, that is, the amplitude of the SZ effect, with unprecedented accuracy at intermediate cluster-centric radii, which in turn allows performing a detailed spatially resolved comparison with X-ray measurements. Given such higher quality observational data, we developed a Bayesian approach that combines informed priors on the physics of the intracluster medium obtained from hydrodynamical simulations of massive clusters with measurement uncertainties. We applied our method to a sample of 61 galaxy clusters with redshifts up to z < 0.5 observed with Planck and XMM-Newton and find H<SUB>0</SUB> = 67 ± 3 km s<SUP>-1</SUP> Mpc<SUP>-1</SUP>.
URI: http://hdl.handle.net/20.500.12386/29562
URL: https://www.aanda.org/articles/aa/full_html/2019/01/aa33879-18/aa33879-18.html
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201833879
Bibcode ADS: 2019A&A...621A..34K
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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