PSZ2G091:A massive double cluster at z=0.822 observed by the NIKA2 camera
arXiv:2111.05082 · doi:10.1051/epjconf/202225700003
Abstract
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.
arXiv comment"To appear in the Proceedings of the International Conference entitled "mm Universe @ NIKA2", Rome (Italy), June 2021, EPJ Web of conferences."
References in corpus (7)
- The universal galaxy cluster pressure profile from a representative sample of nearby systems (REXCESS) and the Y_SZ-M_500 relation
- Effects of Galaxy Formation on Thermodynamics of the Intracluster Medium
- The galaxy cluster mass scale and its impact on cosmological constraints from the cluster population
- New constraints on gravity from clusters of galaxies
- Constraints from thermal Sunyaev-Zeldovich cluster counts and power spectrum combined with CMB
- Cosmological constraints from Planck galaxy clusters with CMB lensing mass bias calibration
- Tests of Gravity with Galaxy Clusters