Spectral imaging of X-COP galaxy clusters with the Sunyaev–Zel’dovich effect
Università di Roma “Tor Vergata”, Via della Ricerca Scientifica, I-00133 Roma, Italy
2 Sapienza Università di Roma, Piazzale Aldo Moro 5, I-00085 Roma, Italy
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Published online: 27 January 2020
The Sunyaev–Zel’dovich effect is the ideal probe for investigating the outskirts of galaxy clusters. To map this signal, we apply a spectral imaging technique which combines parametric component separation and sparse representations. Our procedure is an improved version of an existing algorithm, which now features a better treatment of astrophysical contaminants, and the implementation of a new beam deconvolution. We use the most recent frequency maps delivered by Planck, and we consider the clusters analysed in the XMM Cluster Outskirts Project (X-COP). In particular, we focus on the images of two clusters which may be possibly interacting with neighbouring objects, namely A2029 and RXCJ1825. We also highlight the advantages of the new beam deconvolution method, through a comparison with the original version of the imaging algorithm.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.