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Non-parametric modeling of the intra-cluster gas using APEX-SZ bolometer imaging data
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- Basu, K. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universität Bonn,University of Bonn
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- Zhang, Y. Y. (author)
- Universität Bonn,University of Bonn
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- Sommer, M. W. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universität Bonn,University of Bonn
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- Bender, A. N. (author)
- University of Colorado at Boulder
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- Bertoldi, F. (author)
- Universität Bonn,University of Bonn
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- Dobbs, M. (author)
- McGill University
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- Eckmiller, H. (author)
- Universität Bonn,University of Bonn
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- Halverson, N. W. (author)
- University of Colorado at Boulder
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- Holzapfel, W. L. (author)
- University of California
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- Horellou, Cathy, 1967 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Jaritz, V. (author)
- Universität Bonn,University of Bonn
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- Johansson, Daniel, 1980 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Johnson, B. (author)
- University of California
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- Kennedy, J. (author)
- McGill University
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- Kneissl, R. (author)
- Atacama Large Millimeter-submillimeter Array (ALMA)
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- Lanting, T. (author)
- Cardiff University
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- Lee, A. T. (author)
- University of California,Lawrence Berkeley National Laboratory
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- Mehl, J. (author)
- University of Chicago
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- Menten, K. M. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Navarrete, F. P. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Pacaud, F. (author)
- Universität Bonn,University of Bonn
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- Reichardt, C. L. (author)
- University of California
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- Reiprich, T. H. (author)
- Universität Bonn,University of Bonn
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- Richards, P. L. (author)
- University of California
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- Schwan, D. (author)
- University of California
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- Westbrook, B. (author)
- University of California
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Max Planck Gesellschaft zur Förderung der Wissenschaften eV. (MPG) Universität Bonn (creator_code:org_t)
- 2010-09-08
- 2010
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 519:Article Number: A29
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Abstract
Subject headings
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- Aims. We aim to demonstrate the usability of mm-wavelength imaging data obtained from the APEX-SZ bolometer array to derive the radial temperature profile of the hot intra-cluster gas out to radius r(500) and beyond. The goal is to study the physical properties of the intra-cluster gas by using a non-parametric de-projection method that is, aside from the assumption of spherical symmetry, free from modeling bias. Methods. We use publicly available X-ray spectroscopic-imaging data in the 0.7-2 keV energy band from the XMM-Newton observatory and our Sunyaev-Zel'dovich Effect (SZE) imaging data from the APEX-SZ experiment at 150 GHz to de-project the density and temperature profiles for a well-studied relaxed cluster, Abell 2204. We derive the gas density, temperature and entropy profiles assuming spherical symmetry, and obtain the total mass profile under the assumption of hydrostatic equilibrium. For comparison with X-ray spectroscopic temperature models, a re-analysis of recent Chandra observation is done with the latest calibration updates. We compare the results with that from an unrelaxed cluster, Abell 2163, to illustrate some differences between relaxed and merging systems. Results. Using the non-parametric modeling, we demonstrate a decrease of gas temperature in the cluster outskirts, and also measure gas entropy profiles, both of which are done for the first time independently of X-ray spectroscopy using the SZE and X-ray imaging data. The gas entropy measurement in the central 100 kpc shows the usability of APEX-SZ data for inferring cluster dynamical states with this method. The contribution of the SZE systematic uncertainties in measuring T-e at large radii is shown to be small compared to XMM-Newton and Chandra systematic spectroscopic errors. The total mass profile obtained using the hydrostatic equilibrium assumption is in agreement with the published X-ray and weak lensing results; the upper limit on M-200 derived from the non-parametric method is consistent with the NFW model prediction from weak lensing analysis.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- hubble
- sunyaev-zeldovich
- relation
- constant
- xmm-newton
- mass-temperature
- X-rays: galaxies
- intergalactic medium
- cosmic microwave background
- intracluster
- clusters
- entropy profiles
- relaxed galaxy clusters
- galaxies: clusters: individual: Abell 2204
- cosmology: observations
- x-ray-clusters
- zeldovich effect observations
- medium
- 3-dimensional structure
Publication and Content Type
- art (subject category)
- ref (subject category)
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To the university's database
- By the author/editor
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Basu, K.
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Zhang, Y. Y.
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Sommer, M. W.
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Bender, A. N.
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Bertoldi, F.
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Dobbs, M.
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Eckmiller, H.
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Halverson, N. W.
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Holzapfel, W. L.
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Horellou, Cathy, ...
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Jaritz, V.
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Johansson, Danie ...
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Johnson, B.
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Kennedy, J.
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Kneissl, R.
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Lanting, T.
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Lee, A. T.
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Mehl, J.
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Menten, K. M.
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Navarrete, F. P.
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Pacaud, F.
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Reichardt, C. L.
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Reiprich, T. H.
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Richards, P. L.
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Schwan, D.
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Westbrook, B.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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Astronomy and As ...
- By the university
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Chalmers University of Technology