Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

A low-mass galaxy cluster as a test-case study for the NIKA2 SZ Large Program

Kéruzoré, F., Adam, R., Ade, P. ORCID:, André, P., Andrianasolo, A., Arnaud, M., Aussel, H., Bartalucci, I., Beelen, A., Benoît, A., Bideaud, A., Bourrion, O., Calvo, M., Catalano, A., Comis, B., De Petris, M., Désert, F.-X., Doyle, S. ORCID:, Driessen, E.F.C., Gomez, A., Goupy, J., Kramer, C., Ladjelate, B., Lagache, G., Leclercq, S., Lestrade, J.-F., Macías-Pérez, J.F., Mauskopf, P., Mayet, F., Monfardini, A., Perotto, L., Pisano, G. ORCID:, Pointecouteau, E., Ponthieu, N., Pratt, G.W., Revéret, V., Ritacco, A., Romero, C., Roussel, H., Ruppin, F., Schuster, K., Shu, S., Sievers, A., Tucker, C. ORCID: and Zylka, R. 2020. A low-mass galaxy cluster as a test-case study for the NIKA2 SZ Large Program. EPJ Web of Conferences 228 , 00012. 10.1051/epjconf/202022800012

[thumbnail of epjconf_mmuniverse2019_00012.pdf]
PDF - Published Version
Available under License Creative Commons Attribution.

Download (399kB) | Preview


High-resolution mapping of the hot gas in galaxy clusters is a key tool for cluster-based cosmological analyses. Taking advantage of the NIKA2 millimeter camera operated at the IRAM 30-m telescope, the NIKA2 SZ Large Program seeks to get a high-resolution follow-up of 45 galaxy clusters covering a wide mass range at high redshift in order to re-calibrate some of the tools needed for the cosmological exploitation of SZ surveys. We present the second cluster analysis of this program, targeting one of the faintest sources of the sample in order to tackle the difficulties in data reduction for such faint, low-SNR clusters. In this study, the main challenge is the precise estimation of the contamination by sub-millimetric point sources, which greatly affects the tSZ map of the cluster. We account for this contamination by performing a joint fit of the SZ signal and of the flux density of the compact sources. A prior knowledge of these fluxes is given by the adjustment of the SED of each source using data from both NIKA2 and the Herschel satellite. The first results are very promising and demonstrate the possibility to estimate thermodynamic properties with NIKA2, even in a compact cluster heavily contaminated by point sources.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: EDP Sciences
ISSN: 2100-014X
Date of First Compliant Deposit: 10 March 2020
Date of Acceptance: 27 January 2020
Last Modified: 05 May 2023 09:57

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics