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Found 12 papers, 5 papers with code
The CAMELS project: Expanding the galaxy formation model space with new ASTRID and 28-parameter TNG and SIMBA suites
We present CAMELS-ASTRID, the third suite of hydrodynamical simulations in the Cosmology and Astrophysics with MachinE Learning (CAMELS) project, along with new simulation sets that extend the model parameter space based on the previous frameworks of CAMELS-TNG and CAMELS-SIMBA, to provide broader training sets and testing grounds for machine-learning algorithms designed for cosmological studies.
AI-assisted super-resolution cosmological simulations II: Halo substructures, velocities and higher order statistics
In this work, we expand and test the capabilities of our recently developed super-resolution (SR) model to generate high-resolution (HR) realizations of the full phase-space matter distribution, including both displacement and velocity, from computationally cheap low-resolution (LR) cosmological N-body simulations.
AI-assisted super-resolution cosmological simulations
Cosmological simulations of galaxy formation are limited by finite computational resources.
Automated Measurement of Quasar Redshift with a Gaussian Process
Our technique is an extension of an earlier Gaussian process method for detecting damped Lyman-alpha absorbers (DLAs) in quasar spectra with known redshifts.
Astrophysics of Galaxies Instrumentation and Methods for Astrophysics
Cosmic Filaments from Cosmic Strings
We show that the largest effect of the cosmic string is an overdensity in the filament distribution around the string wake.
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory
Detecting Multiple DLAs per Spectrum in SDSS DR12 with Gaussian Processes
We present a revised version of our automated technique using Gaussian processes (GPs) to detect Damped Lyman-$\alpha$ absorbers (DLAs) along quasar (QSO) sightlines.
Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies Data Analysis, Statistics and Probability
Bayesian emulator optimisation for cosmology: application to the Lyman-alpha forest
Starting with a Latin hypercube sampling (other schemes with good space-filling properties can be used), we iteratively augment the training set with extra simulations at new parameter positions which balance the need to reduce interpolation error while focussing on regions of high likelihood.
Cosmology and Nongalactic Astrophysics
The BAHAMAS project: the CMB--large-scale structure tension and the roles of massive neutrinos and galaxy formation
Recent studies have presented evidence for tension between the constraints on Omega_m and sigma_8 from the cosmic microwave background (CMB) and measurements of large-scale structure (LSS).
Cosmology and Nongalactic Astrophysics
Detecting Damped Lyman-$α$ Absorbers with Gaussian Processes
We develop an automated technique for detecting damped Lyman-$\alpha$ absorbers (DLAs) along spectroscopic lines of sight to quasi-stellar objects (QSOs or quasars).
Cosmology and Nongalactic Astrophysics Data Analysis, Statistics and Probability
The BAHAMAS project: Calibrated hydrodynamical simulations for large-scale structure cosmology
The evolution of the large-scale distribution of matter is sensitive to a variety of fundamental parameters that characterise the dark matter, dark energy, and other aspects of our cosmological framework.
Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies
Properties of galaxies reproduced by a hydrodynamic simulation
Previous simulations of the growth of cosmic structures have broadly reproduced the 'cosmic web' of galaxies that we see in the Universe, but failed to create a mixed population of elliptical and spiral galaxies due to numerical inaccuracies and incomplete physical models.
Cosmology and Nongalactic Astrophysics
Massive Neutrinos and the Non-linear Matter Power Spectrum
We extend the widely used HALOFIT approximation to account for the effect of massive neutrinos on the power spectrum.
Cosmology and Nongalactic Astrophysics
