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54 papers · 2 filters
RCSLenS: A new estimator for large-scale galaxy-matter correlations
A. Buddendiek, P. Schneider, H. Hildebrandt +9
We present measurements of the galaxy bias and the galaxy-matter cross-correlation coefficient for the BOSS LOWZ luminous red galaxy sample. Using a new statistical weak le…
Prospects for high-z cluster detections with Planck, based on a follow-up of 28 candidates using MegaCam@CFHT
R. F. J. van der Burg, H. Aussel, G. W. Pratt +13
The Planck catalogue of SZ sources limits itself to a significance threshold of 4.5 to ensure a low contamination rate by false cluster candidates. This means that only the most ma…
A Free-Form mass model of the Hubble Frontier Fields Cluster AS1063 (RXC J2248.7-4431) with over one hundred constraints
Jose M. Diego, Tom Broadhurst, Jess Wong +5
We derive a free-form mass distribution for the massive cluster AS1063 (z=0.348) using the completed optical imaging from the Hubble Frontier Fields programme. Based on a subset of…
Beyond CDM: Problems, solutions, and the road ahead
Philip Bull, Yashar Akrami, Julian Adamek +37
Despite its continued observational successes, there is a persistent (and growing) interest in extending cosmology beyond the standard model, CDM. This is motivated by a range o…
The brighter galaxies reionised the Universe
Mahavir Sharma, Tom Theuns, Carlos S. Frenk +4
Hydrogen in the Universe was (re)ionised between redshifts and . The nature of the sources of the ionising radiation is hotly debated, with faint galaxi…
CFHTLenS and RCSLenS: Testing Photometric Redshift Distributions Using Angular Cross-Correlations with Spectroscopic Galaxy Surveys
Ami Choi, Catherine Heymans, Chris Blake +6
We determine the accuracy of galaxy redshift distributions as estimated from photometric redshift probability distributions . Our method utilises measurements of the angular…