89 citations · 609 across the 24 of their papers we have counts for
25 papers
Selection Function of Clusters in Dark Energy Survey Year 3 Data from Cross-Matching with South Pole Telescope Detections
S. Grandis, M. Costanzi, J. J. Mohr +52
Galaxy clusters selected based on overdensities of galaxies in photometric surveys provide the largest cluster samples. Yet modeling the selection function of such samples is compl…
SPT Clusters with DES and HST Weak Lensing. II. Cosmological Constraints from the Abundance of Massive Halos
S. Bocquet, S. Grandis, L. E. Bleem +193
We present cosmological constraints from the abundance of galaxy clusters selected via the thermal Sunyaev-Zel'dovich (SZ) effect in South Pole Telescope (SPT) data with a simultan…
Weak lensing mass bias and the alignment of center proxies
Martin W. Sommer, Tim Schrabback, Antonio Ragagnin +1
Galaxy cluster masses derived from observations of weak lensing suffer from a number of biases affecting the accuracy of mass-observable relations calibrated from such observations…
Extending empirical constraints on the SZ-mass scaling relation to higher redshifts via HST weak lensing measurements of nine clusters from the SPT-SZ survey at
Hannah Zohren, Tim Schrabback, Sebastian Bocquet +17
We present a Hubble Space Telescope (HST) weak gravitational lensing study of nine distant and massive galaxy clusters with redshifts ($z_\mathrm{medi…
Weak lensing mass modeling bias and the impact of miscentring
Martin W. Sommer, Tim Schrabback, Douglas E. Applegate +4
Parametric modeling of galaxy cluster density profiles from weak lensing observations leads to a mass bias, whose detailed understanding is critical in deriving accurate mass-obser…
Mass calibration of distant SPT galaxy clusters through expanded weak lensing follow-up observations with HST, VLT & Gemini-South
T. Schrabback, S. Bocquet, M. Sommer +18
Expanding from previous work we present weak lensing measurements for a total sample of 30 distant () massive galaxy clusters from the South Pole Telescope…
Weak lensing measurements of the APEX-SZ galaxy cluster sample
Matthias Klein, Holger Israel, Aarti Nagarajan +5
We present a weak lensing analysis for galaxy clusters from the APEX-SZ survey. For massive galaxy clusters that were observed via the Sunyaev-Zel\textquotesingle dovich effec…
A LOFAR study of non-merging massive galaxy clusters
Federica Savini, Annalisa Bonafede, Marcus Brueggen +15
Centrally located diffuse radio emission has been observed in both merging and non-merging galaxy clusters. Depending on their morphology and size, we distinguish between giant rad…
Discovery of large scale shock fronts correlated with the radio halo and radio relic in the A2163 galaxy cluster
Sophia Thölken, Thomas H. Reiprich, Martin W. Sommer +1
Imprints of galaxy cluster formation processes are visible in the intracluster medium and can arise in shock fronts, which are detectable via discontinuities in e.g. the gas temper…
Weak-lensing mass calibration of the Sunyaev-Zel'dovich effect using APEX-SZ galaxy clusters
A. Nagarajan, F. Pacaud, M. Sommer +16
The use of galaxy clusters as precision cosmological probes relies on an accurate determination of their masses. However, inferring the relationship between cluster mass and observ…
MERGHERS: An SZ-selected cluster survey with MeerKAT
Kenda Knowles, Andrew Baker, Kaustuv Basu +20
The MeerKAT telescope will be one of the most sensitive radio arrays in the pre-SKA era. Here we discuss a low-frequency SZ-selected cluster survey with MeerKAT, the MeerKAT Extend…
Galaxy cluster outskirts from the thermal SZ and non-thermal synchrotron link
Kaustuv Basu, Jens Erler, Martin Sommer +2
Galaxy cluster merger shocks are the main agent for the thermalization of the intracluster medium and the energization of cosmic ray particles in it. Shock propagation changes the…
Mpc-scale diffuse radio emission in two massive cool-core clusters of galaxies
Martin W. Sommer, Kaustuv Basu, Huib Intema +4
Radio halos are diffuse synchrotron sources on scales of ~1 Mpc that are found in merging clusters of galaxies, and are believed to be powered by electrons re-accelerated by the me…
ALMA-SZ Detection of a Galaxy Cluster Merger Shock at Half the Age of the Universe
Kaustuv Basu, Martin Sommer, Jens Erler +5
We present ALMA measurements of a merger shock using the thermal Sunyaev-Zel'dovich (SZ) effect signal, at the location of a radio relic in the famous El Gordo galaxy cluster at $z…
The impact of the SZ effect on cm-wavelength (1-30 GHz) observation of galaxy cluster radio relics
Kaustuv Basu, Franco Vazza, Jens Erler +1
(Abridged) Radio relics in galaxy clusters are believed to be associated with powerful shock fronts that originate during cluster mergers, and are a testbed for the acceleration of…
Radio halos in SZ-selected clusters of galaxies: the making of a halo?
A. Bonafede, H. T. Intema, M. Brüggen +8
Radio halos are synchrotron radio sources detected in some massive galaxy clusters. Their Mpc-size indicates that (re)acceleration processes are taking place in the host cluster. X…
Optical & Sunyaev-Zel'dovich Observations of a New Sample of Distant Rich Galaxy Clusters in the ROSAT All Sky Survey
A. Buddendiek, T. Schrabback, C. H. Greer +15
Finding a sample of the most massive clusters with redshifts can provide an interesting consistency check of the cold dark matter (CDM) model. Here we present result…
A giant radio halo in the cool core cluster CL1821+643
A. Bonafede, H. T. Intema, M. Brüggen +8
Giant radio halos are Mpc-size sources found in some merging galaxy clusters. The synchrotron emitting electrons are thought to be (re)accelerated by plasma turbulence induced by t…
Galaxy cluster scaling relations measured with APEX-SZ
A. N. Bender, J. Kennedy, P. A. R. Ade +30
We present thermal Sunyaev-Zel'dovich effect (SZE) measurements for 42 galaxy clusters observed at 150 GHz with the APEX-SZ experiment. For each cluster, we model the pressure prof…
A comparative study of radio halo occurrence in SZ and X-ray selected galaxy cluster samples
Martin W. Sommer, Kaustuv Basu
We aim at an unbiased census of the radio halo population in galaxy clusters and test whether current low number counts of radio halos have arisen from selection biases. We constru…
Redshift evolution of the 1.4 GHz volume averaged radio luminosity function in clusters of galaxies
M. W. Sommer, K. Basu, F. Pacaud +2
By cross-correlating large samples of galaxy clusters with publicly available radio source catalogs, we construct the volume-averaged radio luminosity function (RLF) in clusters of…
Joint X-ray/Sunyaev-Zel'dovich Analysis of the Intra-Cluster Medium
Kaustuv Basu, Martin W. Sommer, Yu-Ying Zhang
We present results from a joint X-ray/Sunyaev-Zel'dovich modeling of the intra-cluster gas using XMM-Newton and APEX-SZ imaging data. The goal is to study the physical properties o…
Submillimetre observations of RX J1856.5--3754
B. Posselt, K. Schreyer, R. Perna +3
We report on submillimetre bolometer observations of the isolated neutron star RX J1856.5--3754 using the LABOCA bolometer array on the Atacama Pathfinder Experiment (APEX) Telesco…
Submillimeter galaxies behind the Bullet Cluster (1E 0657-56)
Daniel Johansson, Cathy Horellou, Martin W. Sommer +6
Clusters of galaxies are effective gravitational lenses able to magnify background galaxies and making it possible to probe the fainter part of the galaxy population. Submillimeter…