1k citations · 4.7k across the 35 of their papers we have counts for
30 papers · 1 filter
The halo model for cosmology: a pedagogical review
Marika Asgari, Alexander J. Mead, Catherine Heymans
We present a pedagogical review of the halo model, a flexible framework that can describe the distribution of matter and its tracers on non-linear scales for both conventional and…
On constraining Cosmology and the Halo Mass Function with Weak Gravitational Lensing
Shiming Gu, Marc-Antoine Dor, Ludovic van Waerbeke +4
The discrepancy between the weak lensing (WL) and the {\it Planck} measurements of has been a subject of several studies. These studies tend to show that a suppression of the…
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…
The halo model with beyond-linear halo bias: unbiasing cosmological constraints from galaxy-galaxy lensing and clustering
Constance Mahony, Andrej Dvornik, Alexander Mead +6
We determine the error introduced in a joint halo model analysis of galaxy-galaxy lensing and galaxy clustering observables when adopting the standard approximation of linear halo…
Constraining AGN feedback model with SZ profile
Hideki Tanimura, Gary Hinshaw, Ian G. McCarthy +7
Relativistic jets from AGN have a wide range of impacts on galaxy groups and clusters and are key for understanding their formation and physical properties. However, this non-gravi…
Joint constraints on cosmology and the impact of baryon feedback: combining KiDS-1000 lensing with the thermal Sunyaev-Zeldovich effect from Planck and ACT
Tilman Tröster, Alexander J. Mead, Catherine Heymans +13
We conduct a pseudo- analysis of the tomographic cross-correlation between 1000 deg of weak lensing data from the Kilo-Degree Survey (KiDS-1000) and the thermal Sunyaev…
Probing galaxy bias and intergalactic gas pressure with KiDS Galaxies-tSZ-CMB lensing cross-correlations
Ziang Yan, Ludovic van Waerbeke, Tilman Tröster +14
We constrain the redshift dependence of gas pressure bias (bias-weighted average electron pressure), which characterises the thermo…
Including beyond-linear halo bias in halo models
Alexander Mead, Licia Verde
We derive a simple prescription for including beyond-linear halo bias within the standard, analytical halo-model power spectrum calculation. This results in a corrective term that…
KiDS-1000 Cosmology: constraints beyond flat CDM
Tilman Tröster, Marika Asgari, Chris Blake +26
We present constraints on extensions to the flat CDM cosmological model by varying the spatial curvature , the sum of the neutrino masses , the dark energy equati…
Impact of cosmological signatures in two-point statistics beyond the linear regime
Dante V. Gomez-Navarro, Alexander Mead, Alejandro Aviles +1
Some beyond CDM cosmological models have dark-sector energy densities that suffer phase transitions. Fluctuations entering the horizon during such a transition can receive enhan…
HMcode-2020: Improved modelling of non-linear cosmological power spectra with baryonic feedback
Alexander Mead, Samuel Brieden, Tilman Tröster +1
We present an updated version of the HMcode augmented halo model that can be used to make accurate predictions of the non-linear matter power spectrum over a wide range of cosmolog…
Axion Quark Nugget Dark Matter: Time Modulations and Amplifications
Xunyu Liang, Alexander Mead, Md Shahriar Rahim Siddiqui +2
We study the new mechanism of the axion production suggested recently in [1,2]. This mechanism is based on the so-called Axion Quark Nugget (AQN) dark matter model, which was origi…
Modelling baryonic feedback for survey cosmology
Nora Elisa Chisari, Alexander J. Mead, Shahab Joudaki +10
Observational cosmology in the next decade will rely on probes of the distribution of matter in the redshift range between to elucidate the nature of dark matter and dark e…
Gravitationally trapped axions on Earth
Kyle Lawson, Xunyu Liang, Alexander Mead +3
We advocate for the idea that there is a fundamentally new mechanism for axion production on Earth, as recently suggested in Fischer et al. (2018) and Liang & Zhitnitsky (2018). We…
Probing hot gas around luminous red galaxies through the Sunyaev-Zel'dovich effect
Hideki Tanimura, Gary Hinshaw, Ian G. McCarthy +7
We construct the mean thermal Sunyaev-Zel'dovich (tSZ) Comptonization y profile around Luminous Red Galaxies (LRGs) in the redshift range 0.16 < z < 0.47 from the Sloan Digital Sky…
KiDS+VIKING-450: Cosmic shear tomography with optical+infrared data
H. Hildebrandt, F. Köhlinger, J. L. van den Busch +25
We present a tomographic cosmic shear analysis of the Kilo-Degree Survey (KiDS) combined with the VISTA Kilo-Degree Infrared Galaxy Survey (VIKING). This is the first time that a f…
Core Cosmology Library: Precision Cosmological Predictions for LSST
Nora Elisa Chisari, David Alonso, Elisabeth Krause +27
The Core Cosmology Library (CCL) provides routines to compute basic cosmological observables to a high degree of accuracy, which have been verified with an extensive suite of valid…
On the road to percent accuracy: nonlinear reaction of the matter power spectrum to dark energy and modified gravity
Matteo Cataneo, Lucas Lombriser, Catherine Heymans +4
We present a general method to compute the nonlinear matter power spectrum for dark energy and modified gravity scenarios with percent-level accuracy. By adopting the halo model an…
Perturbative Gaussianizing transforms for cosmological fields
Alex Hall, Alexander Mead
Constraints on cosmological parameters from large-scale structure have traditionally been obtained from two-point statistics. However, non-linear structure formation renders these…
KiDS-450 + 2dFLenS: Cosmological parameter constraints from weak gravitational lensing tomography and overlapping redshift-space galaxy clustering
Shahab Joudaki, Chris Blake, Andrew Johnson +19
We perform a combined analysis of cosmic shear tomography, galaxy-galaxy lensing tomography, and redshift-space multipole power spectra (monopole and quadrupole) using 450 deg…
KiDS-450: Testing extensions to the standard cosmological model
Shahab Joudaki, Alexander Mead, Chris Blake +16
We test extensions to the standard cosmological model with weak gravitational lensing tomography using 450 deg of imaging data from the Kilo Degree Survey (KiDS). In these exte…
Spherical collapse, formation hysteresis and the deeply non-linear cosmological power spectrum
Alexander Mead
I examine differences in non-linear structure formation between cosmological models that share a linear power spectrum in both shape and amplitude, but that differ via their…
KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
H. Hildebrandt, M. Viola, C. Heymans +33
We present cosmological parameter constraints from a tomographic weak gravitational lensing analysis of ~450deg of imaging data from the Kilo Degree Survey (KiDS). For a flat $…
Accurate halo-model matter power spectra with dark energy, massive neutrinos and modified gravitational forces
Alexander Mead, Catherine Heymans, Lucas Lombriser +3
We present an accurate non-linear matter power spectrum prediction scheme for a variety of extensions to the standard cosmological paradigm, which uses the tuned halo model previou…