The total mass of a galaxy cluster is one of its most fundamental properties. Together with
the redshift, the mass links observation and theory, allowing us to use the cluster population …

Galaxy groups and poor clusters are more common than rich clusters, and host the largest
fraction of matter content in the Universe. Hence, their studies are key to understand the …

eROSITA (extended ROentgen Survey with an Imaging Telescope Array) is the primary
instrument on the Spectrum-Roentgen-Gamma (SRG) mission, which was successfully …

Aims. The eROSITA Final Equatorial-Depth Survey has been carried out during the
performance verification phase of the Spectrum-Roentgen-Gamma/eROSITA telescope and …

The isotropy of the late Universe and consequently of the X-ray galaxy cluster scaling
relations is an assumption greatly used in astronomy. However, within the last decade, many …

We use a set of hydrodynamical and dark matter-only (DMonly) simulations to calibrate the
halo mass function (HMF). We explore the impact of baryons, propose an improved …

Context. Upcoming X-ray surveys like eROSITA require precise calibration between X-ray
observables and mass down to the low-mass regime to set tight constraints on the …

We present the first weak-lensing mass calibration and X-ray scaling relations of galaxy
clusters and groups selected in the eROSITA Final Equatorial Depth Survey (eFEDS) …

Context. Inferences about dark matter, dark energy, and the missing baryons all depend on
the accuracy of our model of large-scale structure evolution. In particular, with cosmological …

X-ray observations show that galaxy clusters have a very large range of morphologies. The
most disturbed systems, which are good to study how clusters form and grow and to test …