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Distinct distributions of elliptical and disk galaxies across the Local Supercluster as a CDM prediction
Till Sawala, Carlos Frenk, Jens Jasche +2
Galaxies of different types are not equally distributed in the Local Universe. In particular, the supergalactic plane is prominent among the brightest ellipticals, but inconspicuou…
The FLAMINGO project: Baryonic impact on weak gravitational lensing convergence peak counts
Jeger C. Broxterman, Matthieu Schaller, Joop Schaye +12
Weak gravitational lensing convergence peaks, the local maxima in weak lensing convergence maps, have been shown to contain valuable cosmological information complementary to commo…
The FLAMINGO Project: Galaxy clusters in comparison to X-ray observations
Joey Braspenning, Joop Schaye, Matthieu Schaller +10
Galaxy clusters are important probes for both cosmology and galaxy formation physics. We test the cosmological, hydrodynamical FLAMINGO simulations by comparing to observations of…
Inferring the dark matter splashback radius from cluster gas and observable profiles in the FLAMINGO simulations
Imogen Towler, Scott T. Kay, Joop Schaye +10
The splashback radius, coinciding with the minimum in the dark matter radial density gradient, is thought to be a universal definition of the edge of a dark matter halo. Observatio…
The FLAMINGO project: revisiting the tension and the role of baryonic physics
Ian G. McCarthy, Jaime Salcido, Joop Schaye +12
A number of recent studies have found evidence for a tension between observations of large-scale structure (LSS) and the predictions of the standard model of cosmology with the cos…
The abundance of dark matter haloes down to Earth mass
Haonan Zheng, Sownak Bose, Carlos S. Frenk +5
We use the Voids-within-Voids-within-Voids (VVV) simulations, a suite of successive nested N-body simulations with extremely high resolution (denoted, from low to high resolution,…
Non-linear CMB lensing with neutrinos and baryons: FLAMINGO simulations vs. fast approximations
Amol Upadhye, Juliana Kwan, Ian G. McCarthy +11
Weak lensing of the cosmic microwave background is rapidly emerging as a powerful probe of neutrinos, dark energy, and new physics. We present a fast computation of the non-linear…
Origins of the north-south asymmetry in the ALFALFA HI velocity width function
Richard A. N. Brooks, Kyle A. Oman, Carlos S. Frenk
The number density of extragalactic 21-cm radio sources as a function of their spectral line-widths -- the HI width function (HIWF) -- is a tracer of the dark matter halo mass func…
Where shadows lie: reconstruction of anisotropies in the neutrino sky
Willem Elbers, Carlos S. Frenk, Adrian Jenkins +5
The Cosmic Neutrino Background (CNB) encodes a wealth of information, but has not yet been observed directly. To determine the prospects of detection and to study its information c…
Ghostly galaxies: accretion-dominated stellar systems in low-mass dark matter halos
Chung-Wen Wang, Andrew P. Cooper, Sownak Bose +2
Wide-area deep imaging surveys have discovered large numbers of extremely low surface brightness dwarf galaxies, which challenge galaxy formation theory and, potentially, offer new…
The Early Data Release of the Dark Energy Spectroscopic Instrument
DESI Collaboration, A. G. Adame, J. Aguilar +266
The Dark Energy Spectroscopic Instrument (DESI) completed its five-month Survey Validation in May 2021. Spectra of stellar and extragalactic targets from Survey Validation constitu…
Validation of the Scientific Program for the Dark Energy Spectroscopic Instrument
DESI Collaboration, A. G. Adame, J. Aguilar +261
The Dark Energy Spectroscopic Instrument (DESI) was designed to conduct a survey covering 14,000 deg over five years to constrain the cosmic expansion history through precise m…
FLAMINGO: Calibrating large cosmological hydrodynamical simulations with machine learning
Roi Kugel, Joop Schaye, Matthieu Schaller +17
To fully take advantage of the data provided by large-scale structure surveys, we need to quantify the potential impact of baryonic effects, such as feedback from active galactic n…
The FLAMINGO project: cosmological hydrodynamical simulations for large-scale structure and galaxy cluster surveys
Joop Schaye, Roi Kugel, Matthieu Schaller +17
We introduce the Virgo Consortium's FLAMINGO suite of hydrodynamical simulations for cosmology and galaxy cluster physics. To ensure the simulations are sufficiently realistic for…
The mass accretion history of dark matter haloes down to Earth mass
Yizhou Liu, Liang Gao, Sownak Bose +6
We take advantage of the unprecedented dynamical range provided by the "Cosmic-Zoom" project to study the mass accretion history (MAH) of present-day dark matter haloes over the en…
The impact of the Large Magellanic Cloud on dark matter direct detection signals
Adam Smith-Orlik, Nima Ronaghi, Nassim Bozorgnia +9
We study the effect of the Large Magellanic Cloud (LMC) on the dark matter (DM) distribution in the Solar neighborhood, utilizing the Auriga magneto-hydrodynamical simulations of M…
Strong gravitational lensing's 'external shear' is not shear
Amy Etherington, James W. Nightingale, Richard Massey +19
The distribution of mass in galaxy-scale strong gravitational lenses is often modelled as an elliptical power law plus 'external shear', which notionally accounts for neighbouring…