Bayesian analysis of weak gravitational lensing and Sunyaev-Zel’dovich data for six galaxy clusters★
| Autor: | Keith Grainge, Eduardo Serra Cypriano, Guy G. Pooley, Michael P. Hobson, Thomas Erben, Timothy W. Shimwell, Carmen Rodríguez-Gonzálvez, Farhan Feroz, Matthew L. Davies, Philip J. Marshall, Jonathan T. L. Zwart, Natasha Hurley-Walker, Sarah Bridle, David Titterington, Anthony Lasenby, Michel P. Schammel, Elizabeth Waldram, Anna M. M. Scaife, Thomas M. O. Franzen, Paul F. Scott, Richard D. E. Saunders, Malak Olamaie |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Arcminute Microkelvin Imager Bayesian probability Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Redshift law.invention Telescope Space and Planetary Science law Cluster (physics) Astrophysics::Galaxy Astrophysics Weak gravitational lensing Galaxy cluster |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 419:2921-2942 |
| ISSN: | 0035-8711 |
| Popis: | We present an analysis of observations made with the Arcminute Microkelvin Imager (AMI) and the Canada-France-Hawaii Telescope (CFHT) of six galaxy clusters in a redshift range of 0.16--0.41. The cluster gas is modelled using the Sunyaev--Zel'dovich (SZ) data provided by AMI, while the total mass is modelled using the lensing data from the CFHT. In this paper, we: i) find very good agreement between SZ measurements (assuming large-scale virialisation and a gas-fraction prior) and lensing measurements of the total cluster masses out to r_200; ii) perform the first multiple-component weak-lensing analysis of A115; iii) confirm the unusual separation between the gas and mass components in A1914; iv) jointly analyse the SZ and lensing data for the relaxed cluster A611, confirming our use of a simulation-derived mass-temperature relation for parameterizing measurements of the SZ effect. |
| Databáze: | OpenAIRE |
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