199 citations · 1k across the 18 of their papers we have counts for
18 papers
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…
The BUFFALO HST Survey
Charles L. Steinhardt, Mathilde Jauzac, Ana Acebron +91
The Beyond Ultra-deep Frontier Fields and Legacy Observations (BUFFALO) is a 101 orbit + 101 parallel Cycle 25 Hubble Space Telescope Treasury program taking data from 2018-2020. B…
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.,…
A shock front at the radio relic of Abell 2744
Dominique Eckert, Mathilde Jauzac, Franco Vazza +5
Radio relics are Mpc-scale diffuse radio sources at the peripheries of galaxy clusters which are thought to trace outgoing merger shocks. We present XMM-Newton and Suzaku observati…
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…
Probing the cosmic-ray content of galaxy clusters by stacking Fermi-LAT count maps
B. Huber, C. Tchernin, D. Eckert +4
Observations in radio have shown that galaxy clusters are giant reservoirs of cosmic rays (CR). Although a gamma- ray signal from the cluster volume is expected to arise through in…
Measuring the correlation length of intergalactic magnetic fields from observations of gamma-ray induced cascades
A. Neronov, A. M. Taylor, C. Tchernin +1
Context. The imaging and timing properties of γ-ray emission from electromagnetic cascades initiated by very-high-energy (VHE) γ-rays in the intergalactic medium depend on the stre…
PeV neutrinos from interactions of cosmic rays with the interstellar medium in the Galaxy
A. Neronov, D. V. Semikoz, C. Tchernin
We present a self-consistent interpretation of the of very-high-energy neutrino signal from the direction of the inner Galaxy, which is a part of the astronomical neutrino signal r…
Neutrino signal from extended Galactic sources in IceCube
C. Tchernin, J. A. Aguilar, A. Neronov +1
We explore the detectability of the neutrino flux from the entire Galactic Plane or from a part of it with IceCube. We calculate the normalization and the spectral index of the neu…
An exploration of hadronic interactions in blazars using IceCube
C. Tchernin, J. A. Aguilar, A. Neronov +1
Context: Hadronic models, involving matter (proton or nuclei) acceleration in blazar jets, imply high energy photon and neutrino emissions due to interactions of high-energy proton…