Oppizzi, F.F.OppizziDe Luca, F.F.De LucaBourdin, H.H.BourdinMazzotta, P.P.MazzottaETTORI, STEFANOSTEFANOETTORIGASTALDELLO, FabioFabioGASTALDELLOKay, S.S.KayLovisari, L.L.LovisariMaughan, B. J.B. J.MaughanPointecouteau, E.E.PointecouteauPratt, G. W.G. W.PrattROSSETTI, MariachiaraMariachiaraROSSETTISayers, J.J.SayersSERENO, MauroMauroSERENO2025-01-142025-01-1420230004-6361http://hdl.handle.net/20.500.12386/35628Context. Pressure profiles are sensitive probes of the thermodynamic conditions and the internal structure of galaxy clusters. The intra-cluster gas resides in hydrostatic equilibrium within the dark-matter gravitational potential. However, this equilibrium may be perturbed; for example, as a consequence of thermal energy losses, feedback, and non-thermal pressure supports. Accurate measures of the gas pressure over cosmic time are crucial for constraining cluster evolution as well as the contributions from astrophysical processes. <BR /> Aims: In this work we present a novel algorithm for deriving the pressure profiles of galaxy clusters from the Sunyaev-Zeldovich (SZ) signal measured on a combination of Planck and South Pole Telescope (SPT) observations. The synergy of the two instruments makes it possible to track the profiles on a wide range of spatial scales. We exploited the sensitivity of the Planck High-Frequency Instrument to the larger scales in order to observe the faint peripheries, and took advantage of the higher spatial resolution of SPT to solve the innermost regions. <BR /> Methods: We developed a two-step pipeline to take advantage of the specifications of each instrument. We first performed a component separation on the two data sets separately in order to remove the background (CMB) and foreground (Galactic emission) contaminants. We then jointly fitted a parametric pressure profile model on a combination of Planck and SPT data. <BR /> Results: We validated our technique on a sample of six CHEX-MATE clusters detected by SPT. We compare the results of the SZ analysis with profiles derived from X-ray observations with XMM-Newton. We find excellent agreement between these two independent probes of the gas pressure structure.STAMPAenArticle10.1051/0004-6361/2022450122-s2.0-85153387019http://arxiv.org/abs/2209.09601v1https://www.aanda.org/articles/aa/full_html/2023/04/aa45012-22/aa45012-22.html2023A&A...672A.156OFIS/05 - ASTRONOMIA E ASTROFISICA