111 citations · 455 across the 13 of their papers we have counts for
13 papers
6x2pt: Forecasting gains from joint weak lensing and galaxy clustering analyses with spectroscopic-photometric galaxy cross-correlations
Harry Johnston, Nora Elisa Chisari, Shahab Joudaki +25
We explore the enhanced self-calibration of photometric galaxy redshift distributions, , through the combination of up to six two-point functions. Our config…
The Intrinsic Alignment of Galaxy Clusters and Impact of Projection Effects
Jingjing Shi, Tomomi Sunayama, Toshiki Kurita +7
Galaxy clusters, being the most massive objects in the Universe, exhibit the strongest alignment with the large-scale structure. However, mis-identification of members due to proje…
KiDS-1000: Combined halo-model cosmology constraints from galaxy abundance, galaxy clustering and galaxy-galaxy lensing
Andrej Dvornik, Catherine Heymans, Marika Asgari +14
We present constraints on the flat CDM cosmological model through a joint analysis of galaxy abundance, galaxy clustering and galaxy-galaxy lensing observables with the Kilo-Deg…
Intrinsic correlations of galaxy sizes in a hydrodynamical cosmological simulation
Harry Johnston, Dana Sophia Westbeek, Sjoerd Weide +4
Residuals between measured galactic radii and those predicted by the Fundamental Plane (FP) are possible tracers of weak lensing magnification. However, observations have shown the…
Euclid: Calibrating photometric redshifts with spectroscopic cross-correlations
K. Naidoo, H. Johnston, B. Joachimi +126
Cosmological constraints from key probes of the Euclid imaging survey rely critically on the accurate determination of the true redshift distributions, , of tomographic redsh…
KiDS-1000: Constraints on the intrinsic alignment of luminous red galaxies
Maria Cristina Fortuna, Henk Hoekstra, Harry Johnston +11
We constrain the luminosity and redshift dependence of the intrinsic alignment (IA) of a nearly volume-limited sample of luminous red galaxies selected from the fourth public data…
Bright galaxy sample in the Kilo-Degree Survey Data Release 4: selection, photometric redshifts, and physical properties
M. Bilicki, A. Dvornik, H. Hoekstra +16
We present a bright galaxy sample with accurate and precise photometric redshifts (photo-zs), selected using photometry from the Kilo-Degree Survey (KiDS) Da…
Organised Randoms: Learning and correcting for systematic galaxy clustering patterns in KiDS using self-organising maps
Harry Johnston, Angus H. Wright, Benjamin Joachimi +10
We present a new method for the mitigation of observational systematic effects in angular galaxy clustering via corrective random galaxy catalogues. Real and synthetic galaxy data,…
The PAU Survey: Intrinsic alignments and clustering of narrow-band photometric galaxies
Harry Johnston, Benjamin Joachimi, Peder Norberg +20
We present the first measurements of the projected clustering and intrinsic alignments (IA) of galaxies observed by the Physics of the Accelerating Universe Survey (PAUS). With pho…
Clustering of red-sequence galaxies in the fourth data release ofthe Kilo-Degree Survey
Mohammadjavad Vakili, Henk Hoekstra, Maciej Bilicki +13
We present a sample of luminous red-sequence galaxies to study the large-scale structure in the fourth data release of the Kilo-Degree Survey. The selected galaxies are defined by…
The halo model as a versatile tool to predict intrinsic alignments
Maria Cristina Fortuna, Henk Hoekstra, Benjamin Joachimi +4
Intrinsic alignments (IAs) of galaxies are an important contaminant for cosmic shear studies, but the modelling is complicated by the dependence of the signal on the source galaxy…
KiDS+GAMA: Intrinsic alignment model constraints for current and future weak lensing cosmology
Harry Johnston, Christos Georgiou, Benjamin Joachimi +8
We directly constrain the non-linear alignment (NLA) model of intrinsic galaxy alignments, analysing the most representative and complete flux-limited sample of spectroscopic galax…
The dependence of intrinsic alignment of galaxies on wavelength using KiDS and GAMA
Christos Georgiou, Harry Johnston, Henk Hoekstra +6
The outer regions of galaxies are more susceptible to the tidal interactions that lead to intrinsic alignments of galaxies. The resulting alignment signal may therefore depend on t…