PSZ2 G091.83+26.11 is a massive galaxy cluster with M500 = 7.43 x 10^14 Msun 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.
@article{arxiv.2111.05082,
title = {PSZ2G091:A massive double cluster at z=0.822 observed by the NIKA2 camera},
author = {E. Artis and R. Adam and P. Ade and H. Ajeddig and P. André and M. Arnaud and H. Aussel and I. Bartalucci and A. Beelen and A. Benoît and S. Berta and L. Bing and O. Bourrion and M. Calvo and A. Catalano and M. De Petris and F. -X. Désert and S. Doyle and E. F. C. Driessen and A. Ferragamo and A. Gomez and J. Goupy and F. Kéruzoré and C. Kramer and B. Ladjelate and G. Lagache and S. Leclercq and J. -F. Lestrade and J. -F. Macías-Pérez and A. Maury and P. Mauskopf and F. Mayet and A. Monfardini and M. Muñoz-Echeverrí and A. Paliwal and L. Perotto and G. Pisano and E. Pointecouteau and N. Ponthieu and G. W. Pratt and V. Revéret and A. J. Rigby and A. Ritacco and C. Romero and H. Roussel and F. Ruppin and K. Schuster and S. Shu and A. Sievers and C. Tucker and G. Yepes},
journal= {arXiv preprint arXiv:2111.05082},
year = {2022}
}
Comments
"To appear in the Proceedings of the International Conference entitled "mm Universe @ NIKA2", Rome (Italy), June 2021, EPJ Web of conferences."