317 citations · 1k across the 31 of their papers we have counts for
24 papers · 1 filter
Dark Matter Constraints from Small-Scale Cosmic Structure
Ethan O. Nadler, Keir K. Rogers, Alex Drlica-Wagner
Small-scale cosmic structure provides a powerful test of the fundamental nature of dark matter (DM). A wide range of DM models impact matter clustering on small scales, including w…
Strongest constraints on dark acoustic oscillations from the Lyman-alpha forest
Zhihan Yuan, Caleb Gemmell, Keir K. Rogers +4
We set the first constraints on a small-scale dark acoustic oscillation (DAO) in the linear matter power spectrum arising from dark sector interactions, with a full forward model o…
The Atacama Cosmology Telescope: Probing new signatures of ultralight axions with gravitational lensing
Alex Laguë, Keir K. Rogers, Mathew S. Madhavacheril +14
Ultralight axions (ULAs) are well-motivated dark matter particle candidates that arise in many extensions of the Standard Model of particle physics. ULAs with mass $m_\mathrm{a} \l…
Prospects for disentangling dark matter with weak lensing
Calvin Preston, Keir K. Rogers, Alexandra Amon +1
We investigate the degeneracy between the effects of ultra-light axion dark matter and baryonic feedback in suppressing the matter power spectrum. We forecast that galaxy shear dat…
Interference in Fuzzy Dark Matter Filaments: Idealised Models and Statistics
Tim Zimmermann, David J. E. Marsh, Keir K. Rogers +2
Fuzzy (wave) dark matter (FDM), the dynamical model underlying an ultralight bosonic dark matter species, produces a rich set of non-gravitational signatures that distinguishes it…
High-redshift, small-scale tests of ultralight axion dark matter using Hubble and Webb galaxy UV luminosities
Harrison Winch, Keir K. Rogers, Renée Hložek +1
We calculate the abundance of UV-bright galaxies in the presence of ultralight axion (ULA) dark matter (DM), finding that axions suppress their formation with a non-trivial depende…
Extreme Axions Unveiled: a Novel Fluid Approach for Cosmological Modeling
Harrison Winch, Renee Hlozek, David J. E. Marsh +2
Axion-like particles (ALPs) are a well-motivated dark matter candidate that solve some of the problems in the clustering of large scale structure in cosmology. ALPs are often descr…
Cosmological simulations of mixed ultralight dark matter
Alex Laguë, Bodo Schwabe, Renée Hložek +2
The era of precision cosmology allows us to test the composition of the dark matter. Mixed ultralight or fuzzy dark matter (FDM) is a cosmological model with dark matter composed o…
Ultra-light axions and the tension: joint constraints from the cosmic microwave background and galaxy clustering
Keir K. Rogers, Renée Hložek, Alex Laguë +5
We search for ultra-light axions as dark matter (DM) and dark energy particle candidates, for axion masses , by…
Non-linearities in the Lyman- forest and in its cross-correlation with dark matter halos
Jahmour J. Givans, Andreu Font-Ribera, Anže Slosar +6
Three-dimensional correlations of the Lyman- (Ly) forest and cross correlations between the Ly forest and quasars have been measured on large scales, allowing a precise me…
New limits on light dark matter - proton cross section from the cosmic large-scale structure
Keir K. Rogers, Cora Dvorkin, Hiranya V. Peiris
We set the strongest limits to-date on the velocity-independent dark matter (DM) - proton cross section for DM masses to , using large…
Fuzzy Dark Matter and the Dark Energy Survey Year 1 Data
Mona Dentler, David J. E. Marsh, Renée Hložek +3
Gravitational weak lensing by dark matter halos leads to a measurable imprint in the shear correlation function of galaxies. Fuzzy dark matter (FDM), composed of ultralight axion-l…
Constraining Ultralight Axions with Galaxy Surveys
Alex Laguë, J. Richard Bond, Renée Hložek +3
Ultralight axions and other bosons are dark matter candidates present in many high energy physics theories beyond the Standard Model. In particular, the string axiverse postulates…
An emulator for the Lyman- forest in beyond-CDM cosmologies
Christian Pedersen, Andreu Font-Ribera, Keir K. Rogers +4
Interpreting observations of the Lyman- forest flux power spectrum requires interpolation between a small number of expensive simulations. We present a Gaussian process emulator…
General framework for cosmological dark matter bounds using -body simulations
Keir K. Rogers, Hiranya V. Peiris
We present a general framework for obtaining robust bounds on the nature of dark matter using cosmological -body simulations and Lyman-alpha forest data. We construct an emulato…
Strong bound on canonical ultra-light axion dark matter from the Lyman-alpha forest
Keir K. Rogers, Hiranya V. Peiris
We present a new bound on the ultra-light axion (ULA) dark matter mass , using the Lyman-alpha forest to look for suppressed cosmic structure growth: a 95% lower limit…
Massive neutrinos and degeneracies in Lyman-alpha forest simulations
Christian Pedersen, Andreu Font-Ribera, Thomas D. Kitching +5
Using a suite of hydrodynamical simulations with cold dark matter, baryons, and neutrinos, we present a detailed study of the effect of massive neutrinos on the 1-D and 3-D flux po…
An Emulator for the Lyman-alpha Forest
Simeon Bird, Keir K. Rogers, Hiranya V. Peiris +3
We present methods for interpolating between the 1-D flux power spectrum of the Lyman- forest, as output by cosmological hydrodynamic simulations. Interpolation is necessary for…
Bayesian emulator optimisation for cosmology: application to the Lyman-alpha forest
Keir K. Rogers, Hiranya V. Peiris, Andrew Pontzen +3
The Lyman-alpha forest provides strong constraints on both cosmological parameters and intergalactic medium astrophysics, which are forecast to improve further with the next genera…
Cosmological Hydrodynamic Simulations with Suppressed Variance in the Lyman- Forest Power Spectrum
Lauren Anderson, Andrew Pontzen, Andreu Font-Ribera +3
We test a method to reduce unwanted sample variance when predicting Lyman- (ly) forest power spectra from cosmological hydrodynamical simulations. Sample variance arises due…
Correlations in the three-dimensional Lyman-alpha forest contaminated by high column density absorbers
Keir K. Rogers, Simeon Bird, Hiranya V. Peiris +3
Correlations measured in three dimensions in the Lyman-alpha forest are contaminated by the presence of the damping wings of high column density (HCD) absorbing systems of neutral…
Simulating the effect of high column density absorbers on the one-dimensional Lyman-alpha forest flux power spectrum
Keir K. Rogers, Simeon Bird, Hiranya V. Peiris +3
We measure the effect of high column density absorbing systems of neutral hydrogen (HI) on the one-dimensional (1D) Lyman-alpha forest flux power spectrum using cosmological hydrod…
Spin-SILC: CMB polarisation component separation with spin wavelets
Keir K. Rogers, Hiranya V. Peiris, Boris Leistedt +2
We present Spin-SILC, a new foreground component separation method that accurately extracts the cosmic microwave background (CMB) polarisation and modes from raw multifrequ…
SILC: a new Planck Internal Linear Combination CMB temperature map using directional wavelets
Keir K. Rogers, Hiranya V. Peiris, Boris Leistedt +2
We present new clean maps of the CMB temperature anisotropies (as measured by Planck) constructed with a novel internal linear combination (ILC) algorithm using directional, scale-…