Iqbal, AsifAsifIqbalMajumdar, SubhabrataSubhabrataMajumdarNath, Biman B.Biman B.NathETTORI, STEFANOSTEFANOETTORIEckert, DominiqueDominiqueEckertMalik, Manzoor A.Manzoor A.Malik2020-07-202020-07-2020170035-8711http://hdl.handle.net/20.500.12386/26528We estimate the 'non-gravitational' entropy-injection profiles, ∆K, and the resultant energy feedback profiles, ∆E, of the intracluster medium for 17 clusters using their Planck Sunyaev-Zel'dovich and ROSAT X-ray observations, spanning a large radial range from 0.2r<SUB>500</SUB> up to r<SUB>200</SUB>. The feedback profiles are estimated by comparing the observed entropy, at fixed gas mass shells, with theoretical entropy profiles predicted from non-radiative hydrodynamic simulations. We include non-thermal pressure and gas clumping in our analysis. The inclusion of non-thermal pressure and clumping results in changing the estimates for r<SUB>500</SUB> and r<SUB>200</SUB> by 10-20 per cent. When clumpiness is not considered it leads to an underestimation of ∆K ≈ 300 keV cm<SUP>2</SUP> at r<SUB>500</SUB> and ∆K ≈ 1100 keV cm<SUP>2</SUP> at r<SUB>200</SUB>. On the other hand, neglecting non-thermal pressure results in an overestimation of ∆K ≈ 100 keV cm<SUP>2</SUP> at r<SUB>500</SUB> and underestimation of ∆K ≈ 450 keV cm<SUP>2</SUP> at r<SUB>200</SUB>. For the estimated feedback energy, we find that ignoring clumping leads to an underestimation of energy per particle ∆E ≈ 1 keV at r<SUB>500</SUB> and ∆E ≈ 1.5 keV at r<SUB>200</SUB>. Similarly, neglect of the non-thermal pressure results in an overestimation of ∆E ≈ 0.5 keV at r<SUB>500</SUB> and underestimation of ∆E ≈ 0.25 keV at r<SUB>200</SUB>. We find entropy floor of ∆K ≈ 300 keV cm<SUP>2</SUP> is ruled out at ≈3σ throughout the entire radial range and ∆E ≈ 1 keV at more than 3σ beyond r<SUB>500</SUB>, strongly constraining intracluster medium pre-heating scenarios. We also demonstrate robustness of results w.r.t. sample selection, X-ray analysis procedures, entropy modelling, etc. <P />STAMPAenArticle10.1093/mnras/stx19992-s2.0-85036541581000413765800057https://academic.oup.com/mnras/article/472/1/713/40643832017MNRAS.472..713IFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation