8 papers
Two-dimensional weak lensing shear for cluster mass, concentration, ellipticity and miscentering estimation
Calum Murray, Martin Kilbinger, Constantin Payerne
The effects of weak gravitational lensing induced by clusters of galaxies makes it possible to constrain their dark matter distribution. In general mass estimates from weak lensing…
Assessing the large-scale angular clustering of UNIONS Lyman Break Galaxies via cross-correlations
Constantin Payerne, Christophe Yèche, William d'Assignies Doumerg +8
Lyman-break galaxies (LBGs), selected via the strong spectral break blueward of the Lyman limit, are powerful tracers of large-scale structure at redshifts . In this work, we…
Measuring satellite galaxy subhalo masses in redMaPPer clusters with UNIONS weak lensing data
Roman Akhmetshyn, Jack Elvin-Poole, Michael J. Hudson +13
In this work, we present the observed galaxy-galaxy lensing signal of satellite galaxies in rich clusters obtained from the Ultraviolet Near-Infrared Optical Northern Survey (UNION…
Observing the Peculiar Acceleration of our Solar System with Quasar Proper Motions
Phu Huy Nguyen, Calum Murray
We measured the proper motion dipole of quasars observed by \textit{Gaia} to determine the acceleration of the Solar System with respect to the quasar rest frame. We characterised…
Simulation-based cosmological inference from optically-selected galaxy clusters with
Constantin Payerne, Calum Murray, Hugo Simon
Galaxy clusters are powerful probes of the growth of cosmic structure through measurements of their abundance as a function of mass and redshift. Extracting precise cosmological co…
Weak lensing mass-richness relation of redMaPPer clusters in the LSST DESC DC2 simulations
Constantin Payerne, Zhuowen Zhang, Michel Aguena +13
Cluster scaling relations are key ingredients in cluster abundance-based cosmological studies. In optical cluster cosmology, where clusters are detected through their richness, clu…
Towards including super-sample covariance in the unbinned likelihood for cluster abundance cosmology
Constantin Payerne, Calum Murray, Céline Combet +1
The measurement of the abundance of galaxy clusters in the Universe is a sensitive probe of cosmology, which depends on both the expansion history of the Universe and the growth of…
Multipole analysis of cluster weak lensing shear in The Three Hundred project
Constantin Payerne, Corentin Hanser, Calum Murray +2
Weak gravitational lensing is an important tool to estimate the masses of galaxy clusters, as it allows us to directly access their projected surface mass density along the line-of…