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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29567
Title: Thermodynamic profiles of galaxy clusters from a joint X-ray/SZ analysis
Authors: Shitanishi, Jennifer A.
Pierpaoli, Elena
Sayers, Jack
Golwala, Sunil R.
Ameglio, Silvia
Mantz, Adam B.
Mroczkowski, Tony K.
RASIA, ELENA 
Siegel, Seth
Issue Date: 2018
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 481
Issue: 1
First Page: 749
Abstract: We jointly analyse the Bolocam Sunyaev-Zel'dovich (SZ) effect and Chandra X-ray data for a set of 45 clusters to derive gas density and temperature profiles without using spectroscopic information. The sample spans the mass and redshift range 3 × 10^{14} M_{☉} ≤ M_{500} ≤ 25 × 10^{14} M_{☉} and 0.15 ≤ z ≤ 0.89. We define cool-core and non-cool core subsamples based on the central X-ray luminosity, and 17 out of 45 clusters are classified as cool core. In general, the profiles derived from our analysis are found to be in good agreement with previous analyses, and profile constraints beyond r<SUB>500</SUB> are obtained for 34 out of 45 clusters. In approximately 30 per cent of the cool-core clusters, our analysis shows a central temperature drop with a statistical significance of >3σ; this modest detection fraction is due mainly to a combination of coarse angular resolution and modest signal-to-noise ratio in the SZ data. Most clusters are consistent with an isothermal profile at the largest radii near r<SUB>500</SUB>, although 10 out of 45 show a significant temperature decrease with increasing radius. The sample mean density profile is in good agreement with previous studies, and shows a minimum intrinsic scatter of approximately 10 per cent near 0.5r<SUB>500</SUB>. The sample mean temperature profile is consistent with isothermal, and has an intrinsic scatter of approximately 50 per cent independent of radius. This scatter is significantly higher compared to earlier X-ray-only studies, which find intrinsic scatters near 10 per cent , likely due to a combination of unaccounted-for non-idealities in the SZ noise, projection effects, and sample selection.
URI: http://hdl.handle.net/20.500.12386/29567
URL: https://academic.oup.com/mnras/article-abstract/481/1/749/5069407
ISSN: 0035-8711
DOI: 10.1093/mnras/sty2195
Bibcode ADS: 2018MNRAS.481..749S
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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