199 citations · 1k across the 18 of their papers we have counts for
11 papers · 1 filter
Triaxiality in galaxy clusters: Mass versus Potential reconstructions
Sebastian Stapelberg, Céline Tchernin, Damaris Hug +2
Accounting for the triaxial shapes of galaxy clusters will become important in the context of upcoming cosmological surveys. We show that, compared to the gas density distribution,…
Characterizing galaxy clusters by their gravitational potential: systematics of cluster potential reconstruction
C. Tchernin, E. T. Lau, S. Stapelberg +2
Context. Biases in mass measurements of galaxy clusters are one of the major limiting systematics in constraining cosmology with clusters. Aims. We aim to demonstrate that the syst…
Joint cluster reconstructions: Combining free-form lensing and X-rays
Korbinian Huber, Celine Tchernin, Julian Merten +2
Galaxy clusters provide a multitude of observational data across wavelengths and their structure and morphology are of considerable interest in cosmology as well as astrophysics. W…
Non-thermal pressure support in X-COP galaxy clusters
D. Eckert, V. Ghirardini, S. Ettori +13
Galaxy clusters are the endpoints of structure formation and are continuously growing through the merging and accretion of smaller structures. Numerical simulations predict that a…
Reconstruction of the two-dimensional gravitational potential of galaxy clusters from X-ray and Sunyaev-Zel'dovich measurements
C. Tchernin, M. Bartelmann, K. Huber +8
The mass of galaxy clusters is not a direct observable, nonetheless it is commonly used to probe cosmological models. Based on the combination of all main cluster observables, that…
Mapping the temperature of the intra-cluster medium with the tSZ effect
G. Hurier, C. Tchernin
The hot electrons in the intra-cluster medium produce a spectral distorsion of the cosmic microwave background (CMB) black body emission, the thermal Sunyaev-Zel'dovich effect (tSZ…
The XMM Cluster Outskirts Project (X-COP)
D. Eckert, S. Ettori, E. Pointecouteau +3
Galaxy clusters are thought to grow hierarchically through the continuous merging and accretion of smaller structures across cosmic time. In the local Universe, these phenomena are…
The XMM Cluster Outskirts Project (X-COP): Physical conditions to the virial radius of Abell 2142
C. Tchernin, D. Eckert, S. Ettori +9
Context. Galaxy clusters are continuously growing through the accretion of matter in their outskirts. This process induces inhomogeneities in the gas density distribution (clumping…
The Extraordinary Amount of Substructure in the Hubble Frontier Fields Cluster Abell 2744
M. Jauzac, D. Eckert, J. Schwinn +21
We present a joint optical/X-ray analysis of the massive galaxy cluster Abell 2744 (z=0.308). Our strong- and weak-lensing analysis within the central region of the cluster, i.e.,…
Warm-hot baryons comprise 5-10 per cent of filaments in the cosmic web
Dominique Eckert, Mathilde Jauzac, HuanYuan Shan +8
Observations of the cosmic microwave background indicate that baryons account for 5% of the Universe's total energy content. In the local Universe, the census of all observed baryo…
Reconstructing the projected gravitational potential of Abell 1689 from X-ray measurements
Celine Tchernin, Charles L. Majer, Sven Meyer +3
Context. Galaxy clusters can be used as cosmological probes, but to this end, they need to be thoroughly understood. Combining all cluster observables in a consistent way will help…