Under the assumption that the gas mass fraction of galaxy clusters estimated out to an outer hydrostatic radius is constant, it is possible to constrain the cosmological parameters by using the angular diameter distance relation with redshift. We applied this to a sample of galaxy clusters from redshifts of 0.1 to 0.94, for which published gas and total masses are available from X-ray data. Aft...

We report on the possibility of studying proprieties cosmic diffuse baryons by self-gravitating clumps and filaments connected to galaxy clusters. While are challenging detect with X-ray observations, higher density makes them visible a viable tracer study thermodynamical undergoing accretion along web onto developed new algorithms identify these structures applied set non-radiative cosmologica...

We present the characterisation of massive cluster ClG J104803.7+313843 at z = 0.76 performed using a serendipitous XMM-Newton observation. High redshift and objects represent an ideal laboratory to benchmark our understanding how clusters form assembly formation is mainly driven by gravity. Leveraging high throughput we were firstly able determine object, shedding light on ambiguous photometri...

ABSTRACT We present resolved thermodynamic profiles out to 500 kpc, about r500, of the z = 1.75 galaxy cluster IDCS J1426.5+3508 with 40 kpc resolution. Thanks combination Sunyaev–Zel’dovich and X-ray data sets, becomes most distant profiles. These are derived assuming a non-parametric pressure profile very flexible model for electron density profile. The shape is flatter than universal tempera...

We combine spatially resolved ASCA temperature data with ROSAT imaging data to constrain the total mass distribution in the cluster A401, assuming that the cluster is in hydrostatic equilibrium, but without the assumption of gas isothermality. We obtain a total mass within the X-ray core (290 h 50 kpc) of 1.2 −0.5×10 14 h 50 M⊙ at the 90 % confidence level, 1.3 times larger than the isothermal ...

ABSTRACT A specific modification of Newtonian dynamics known as MOND has been shown to reproduce the most astrophysical systems at different scales without invoking non-baryonic dark matter (DM). There is, however, a long-standing unsolved problem when is applied rich clusters galaxies in form deficit (by factor around two) predicted dynamical mass derived from virial theorem with respect obser...

ABSTRACT We study the evolution of satellite galaxies in clusters c-eagle simulations, a suite 30 high-resolution cosmological hydrodynamical zoom-in simulations based on eagle code. find that majority are quenched at z = 0 (?80${{\ \rm per\ cent}}$) reached this state dense environment (log10M200[M?] ?13.5). At low redshift, regardless final cluster mass, appear to reach their quenching low-ma...

We investigate the properties of the intracluster medium (ICM) that forms within N-body/hydrodynamical simulations of galaxy clusters in a CDM cosmology. When radiative cooling and a simple model for galactic feedback are included, our clusters have X-ray luminosities and temperatures in good agreement with observed systems, demonstrating the required excess entropy in their cores. More general...

We present an analysis of deep XMM-Newton and Chandra observations of the z = 1.05 galaxy cluster XLSSJ022403.9-041328 (hereafter XLSSC 029), detected in the XMM-Newton large scale structure survey. Density and temperature profiles of the X-ray emitting gas were used to perform a hydrostatic mass analysis of the system. This allowed us to measure the total mass and gas fraction in the cluster a...

Introduction: We describe an analysis of a large sample of numerically simulated clusters which demonstrates the effects of using X-ray fitted βmodel parameters with Sunyaev-Zeldovich effect (SZE) data. There is a fundamental incompatibility between β fits to X-ray surface brightness profiles and those done with SZE profiles. Since observational SZE radial profiles are in short supply, the X-ra...