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Non-parametric deprojection of NIKA SZ observations: Pressure distribution in thePlanck-discovered cluster PSZ1?G045.85+57.71

Ruppin, F., Adam, R., Comis, B., Ade, Peter, André, P., Arnaud, M., Beelen, A., Benoît, A., Bideaud, A., Billot, N., Bourrion, O., Calvo, M., Catalano, A., Coiffard, G., D?Addabbo, A., De Petris, M., Désert, F.-X., Doyle, Simon, Goupy, J., Kramer, C., Leclercq, S., Macías-Pérez, J. F., Mauskopf, P., Mayet, F., Monfardini, A., Pajot, F., Pascale, E., Perotto, L., Pisano, Giampaolo, Pointecouteau, E., Ponthieu, N., Pratt, G. W., Revéret, V., Ritacco, A., Rodriguez, L., Romero, C., Schuster, K., Sievers, A., Triqueneaux, S., Tucker, Carole and Zylka, R. 2017. Non-parametric deprojection of NIKA SZ observations: Pressure distribution in thePlanck-discovered cluster PSZ1?G045.85+57.71. Astronomy & Astrophysics 597 , A110. 10.1051/0004-6361/201629405

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Abstract

The determination of the thermodynamic properties of clusters of galaxies at intermediate and high redshift can bring new insights into the formation of large-scale structures. It is essential for a robust calibration of the mass-observable scaling relations and their scatter, which are key ingredients for precise cosmology using cluster statistics. Here we illustrate an application of high resolution (<20 arcsec) thermal Sunyaev-Zel’dovich (tSZ) observations by probing the intracluster medium (ICM) of the Planck-discovered galaxy cluster PSZ1 G045.85+57.71 at redshift z = 0.61, using tSZ data obtained with the NIKA camera, which is a dual-band (150 and 260 GHz) instrument operated at the IRAM 30-m telescope. We deproject jointly NIKA and Planck data to extract the electronic pressure distribution from the cluster core (R ~ 0.02 R500) to its outskirts (R ~ 3 R500) non-parametrically for the first time at intermediate redshift. The constraints on the resulting pressure profile allow us to reduce the relative uncertainty on the integrated Compton parameter by a factor of two compared to the Planck value. Combining the tSZ data and the deprojected electronic density profile from XMM-Newton allows us to undertake a hydrostatic mass analysis, for which we study the impact of a spherical model assumption on the total mass estimate. We also investigate the radial temperature and entropy distributions. These data indicate that PSZ1 G045.85+57.71 is a massive (M500 ~ 5.5 × 1014M⊙) cool-core cluster. This work is part of a pilot study aiming at optimizing the treatment of the NIKA2 tSZ large program dedicated to the follow-up of SZ-discovered clusters at intermediate and high redshifts. This study illustrates the potential of NIKA2 to put constraints on thethermodynamic properties and tSZ-scaling relations of these clusters, and demonstrates the excellent synergy between tSZ and X-ray observations of similar angular resolution.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: EDP Sciences
ISSN: 00046361
Date of First Compliant Deposit: 7 September 2017
Date of Acceptance: 10 September 2016
Last Modified: 27 Jul 2019 21:56
URI: http://orca-mwe.cf.ac.uk/id/eprint/104413

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