123 citations · 514 across the 42 of their papers we have counts for
23 papers · 1 filter
CMBolic: Symbolic emulators for the Cosmic Microwave Background. I. Lensing
David M. J. Vokrouhlicky, Constantinos Skordis, Deaglan J. Bartlett +2
We present the first installment of CMBolic: a suite of symbolic cosmic microwave background (CMB) emulators. In this instance, we emulate the CMB lensing potential power spectrum…
KiDS-Legacy: WIMP dark matter constraints from the cross-correlation of weak lensing and Fermi-LAT gamma rays
Shiyang Zhang, Hendrik Hildebrandt, Ziang Yan +13
Dark matter dominates the matter content of the Universe, and its properties can be constrained through large-scale structure probes such as the cross-correlation between the unres…
Symbolically regressing dark matter halo profiles using weak lensing
Alicia Martín, Tariq Yasin, Deaglan J. Bartlett +2
The structure of dark matter haloes is often described by radial density profiles motivated by cosmological simulations. These are typically assumed to have a fixed functional form…
The Cosmological Dipole in Tilted Anisotropic Universes
Alicia Martín, Constantinos Skordis, Deaglan J. Bartlett +3
There is tentative evidence for a mismatch between the rest frames of matter and the cosmic microwave background, the "quasar dipole anomaly". We consider such a dipole in tilted a…
Constraining dark matter halo profiles with symbolic regression
Alicia Martín, Tariq Yasin, Deaglan J. Bartlett +2
Dark matter haloes are typically characterised by radial density profiles with fixed forms motivated by simulations (e.g. NFW). However, simulation predictions depend on uncertain…
Symbolic Emulators for Cosmology: Accelerating Cosmological Analyses Without Sacrificing Precision
Deaglan J. Bartlett, Shivam Pandey
In cosmology, emulators play a crucial role by providing fast and accurate predictions of complex physical models, enabling efficient exploration of high-dimensional parameter spac…
syren-baryon: Analytic emulators for the impact of baryons on the matter power spectrum
Lukas Kammerer, Deaglan J. Bartlett, Gabriel Kronberger +2
Baryonic physics has a considerable impact on the distribution of matter in our Universe on scales probed by current and future cosmological surveys, acting as a key systematic in…
The Velocity Field Olympics: Assessing velocity field reconstructions with direct distance tracers
Richard Stiskalek, Harry Desmond, Julien Devriendt +5
The peculiar velocity field of the local Universe provides direct insights into its matter distribution and the underlying theory of gravity, and is essential in cosmological analy…
syren-new: Precise formulae for the linear and nonlinear matter power spectra with massive neutrinos and dynamical dark energy
Ce Sui, Deaglan J. Bartlett, Shivam Pandey +3
Current and future large scale structure surveys aim to constrain the neutrino mass and the equation of state of dark energy. We aim to construct accurate and interpretable symboli…
CHARM: Creating Halos with Auto-Regressive Multi-stage networks
Shivam Pandey, Chirag Modi, Benjamin D. Wandelt +7
To maximize the amount of information extracted from cosmological datasets, simulations that accurately represent these observations are necessary. However, traditional simulations…
Scant evidence for thawing quintessence
William J. Wolf, Carlos García-García, Deaglan J. Bartlett +1
New constraints on the expansion rate of the Universe seem to favor evolving dark energy in the form of thawing quintessence models, i.e., models for which a canonical, minimally c…
Bye-bye, Local-in-matter-density Bias: The Statistics of the Halo Field Are Poorly Determined by the Local Mass Density
Deaglan J. Bartlett, Matthew Ho, Benjamin D. Wandelt
Bias models relating the dark matter field to the spatial distribution of halos are widely used in current cosmological analyses. Many models predict halos purely from the local Eu…
syren-halofit: A fast, interpretable, high-precision formula for the CDM nonlinear matter power spectrum
Deaglan J. Bartlett, Benjamin D. Wandelt, Matteo Zennaro +2
Rapid and accurate evaluation of the nonlinear matter power spectrum, , as a function of cosmological parameters and redshift is of fundamental importance in cosmology. Analy…
A precise symbolic emulator of the linear matter power spectrum
Deaglan J. Bartlett, Lukas Kammerer, Gabriel Kronberger +6
Computing the matter power spectrum, , as a function of cosmological parameters can be prohibitively slow in cosmological analyses, hence emulating this calculation is desira…
Optimal Inflationary Potentials
Tomás Sousa, Deaglan J. Bartlett, Harry Desmond +1
Inflation is a highly favoured theory for the early Universe. It is compatible with current observations of the cosmic microwave background and large scale structure and is a drive…
Constraints on dark matter and astrophysics from tomographic -ray cross-correlations
Anya Paopiamsap, David Alonso, Deaglan J. Bartlett +1
We study the cross-correlation between maps of the unresolved -ray background constructed from the 12-year data release of the Fermi Large-Area Telescope, and the overdensity of…
Modeling and testing screening mechanisms in the laboratory and in space
Valeri Vardanyan, Deaglan J. Bartlett
The non-linear dynamics of scalar fields coupled to matter and gravity can lead to remarkable density-dependent screening effects. In this short review we present the main classes…
No evidence for p- or d-wave dark matter annihilation from local large-scale structure
Andrija Kostić, Deaglan J. Bartlett, Harry Desmond
If dark matter annihilates into standard model particles with a cross-section which is velocity dependent, then Local Group dwarf galaxies will not be the best place to search for…
Exhaustive Symbolic Regression
Deaglan J. Bartlett, Harry Desmond, Pedro G. Ferreira
Symbolic Regression (SR) algorithms attempt to learn analytic expressions which fit data accurately and in a highly interpretable manner. Conventional SR suffers from two fundament…
Constraints on dark matter annihilation and decay from the large-scale structure of the nearby universe
Deaglan J. Bartlett, Andrija Kostić, Harry Desmond +2
Decaying or annihilating dark matter particles could be detected through gamma-ray emission from the species they decay or annihilate into. This is usually done by modelling the fl…
Improved cosmological fits with quantized primordial power spectra
D. J. Bartlett, W. J. Handley, A. N. Lasenby
We observationally examine cosmological models based on primordial power spectra with quantized wavevectors. Introducing a linearly quantized power spectrum with $k_0=3.225\times10…
Calibrating galaxy formation effects in galactic tests of fundamental physics
Deaglan J. Bartlett, Harry Desmond, Pedro G. Ferreira
Galactic scale tests have proven to be powerful tools in constraining fundamental physics in previously under-explored regions of parameter space. The astrophysical regime which th…
Constraints on galileons from the positions of supermassive black holes
Deaglan J. Bartlett, Harry Desmond, Pedro G. Ferreira
Galileons are scalar field theories which obey the Galileon symmetry and are capable of self-acceleration if they have an inverted sign for the kinetic term. T…