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PSZ2 G091: A massive double cluster atz~ 0.822 observed by the NIKA2 camera

Artis, E., Adam, R., Ade, Peter ORCID: https://orcid.org/0000-0002-5127-0401, Ajeddig, H., André, P., Arnaud, M., Aussel, H., Bartalucci, I., Beelen, A., Benoît, A., Berta, S., Bing, L., Bourrion, O., Calvo, M., Catalano, A., De Petris, M., Désert, F.-X., Doyle, Simon ORCID: https://orcid.org/0000-0002-9054-986X, Driessen, E. F. C., Ferragamo, A., Gomez, A., Goupy, J., Kéruzoré, F., Kramer, C., Ladjelate, B., Lagache, G., Leclercq, S., Lestrade, J.-F., Macías-Pérez, J.-F., Maury, A., Mauskopf, Philip ORCID: https://orcid.org/0000-0001-6397-5516, Mayet, F., Monfardini, A., Muñoz-Echeverría, M., Paliwal, A., Perotto, L., Pisano, Giampaolo ORCID: https://orcid.org/0000-0003-4302-5681, Pointecouteau, E., Ponthieu, N., Pratt, G. W., Revéret, V., Rigby, Andrew, Ritacco, A., Romero, C., Roussel, H., Ruppin, F., Schuster, K., Shu, S., Sievers, A., Tucker, Carole ORCID: https://orcid.org/0000-0002-1851-3918, Yepes, G., Ferragamo, A. and Mayet, F. 2022. PSZ2 G091: A massive double cluster atz~ 0.822 observed by the NIKA2 camera. EPJ Web of Conferences 257 , 00003. 10.1051/epjconf/202225700003

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Abstract

PSZ2 G091.83+26.11 is a massive galaxy cluster with M500 = 7:43 × 1014M⊙ at z = 0:822. This object exhibits a complex morphology with a clear bimodality observed in X-rays. However, it was detected and analysed in the Planck sample as a single, spherical cluster following a universal profile [1]. This model can lead to miscalculations of thermodynamical quantities, like the pressure profile. As future multiwavelength cluster experiments will detect more and more objects at higher redshifts (where we expect the fraction of merging objects to be higher), it is crucial to quantify this systematic effect. In this work, we use high-resolution observations of PSZ2 G091.83+26.11 by the NIKA2 camera to integrate the morphological characteristics of the cluster in our modelling. This is achieved by fitting a two-halo model to the SZ image and then by reconstruction of the resulting projected pressure profile. We then compare these results with the spherical assumption.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Physics and Astronomy
Publisher: Società Italiana di Fisica
ISSN: 2100-014X
Date of First Compliant Deposit: 27 March 2023
Date of Acceptance: 17 January 2022
Last Modified: 18 May 2023 05:29
URI: https://orca.cardiff.ac.uk/id/eprint/157936

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