422 citations · 2k across the 35 of their papers we have counts for
17 papers · 1 filter
Differentiable Cosmological Hydrodynamics for Field-Level Inference and High Dimensional Parameter Constraints
Benjamin Horowitz, Zarija Lukic
Hydrodynamical simulations are the most accurate way to model structure formation in the universe, but they often involve a large number of astrophysical parameters modeling subgri…
The ACCEL2 Project: Precision Measurements of EFT Parameters and BAO Peak Shifts for the Lyman- Forest
Roger de Belsunce, Shi-Fan Chen, Mikhail M. Ivanov +4
We present precision measurements of the bias parameters of the one-loop power spectrum model of the Lyman-alpha (Lya) forest, derived within the effective field theory of large-sc…
Maximum A Posteriori Ly-alpha Estimator (MAPLE): Band-power and covariance estimation of the 3D Ly-alpha forest power spectrum
Benjamin Horowitz, Roger de Belsunce, Zarija Lukic
We present a novel maximum a posteriori estimator to jointly estimate band-powers and the covariance of the three-dimensional power spectrum (P3D) of Lyman-alpha forest flux fluctu…
Measurements of the Thermal and Ionization State of the Intergalactic Medium during the Cosmic Afternoon
Teng Hu, Vikram Khaire, Joseph F. Hennawi +4
We perform the first measurement of the thermal and ionization state of the intergalactic medium (IGM) across 0.9 < z < 1.5 using 301 \lya absorption lines fitted from 12 HST STIS…
The Impact of the WHIM on the IGM Thermal State Determined from the Low- Lyman- Forest
Teng Hu, Vikram Khaire, Joseph F. Hennawi +4
At , shock heating caused by large-scale velocity flows and possibly violent feedback from galaxy formation, converts a significant fraction of the cool gas ($T\sim 1…
Measuring the thermal and ionization state of the low- IGM using likelihood free inference
Teng Hu, Vikram Khaire, Joseph F. Hennawi +6
We present a new approach to measure the power-law temperature density relationship and the UV background photoionization rate of the IGM base…
Snowmass2021 Cosmic Frontier White Paper: Prospects for obtaining Dark Matter Constraints with DESI
Monica Valluri, Solene Chabanier, Vid Irsic +29
Despite efforts over several decades, direct-detection experiments have not yet led to the discovery of the dark matter (DM) particle. This has led to increasing interest in altern…
Simulating intergalactic gas for DESI-like small scale Lymanα forest observations
Michael Walther, Eric Armengaud, Corentin Ravoux +3
Measurements of the Ly forest based on large numbers of quasar spectra from sky surveys such as SDSS/eBOSS accurately probe the distribution of matter on small scales and thus p…
Report from the Tri-Agency Cosmological Simulation Task Force
Nick Battaglia, Andrew Benson, Tim Eifler +8
The Tri-Agency Cosmological Simulations (TACS) Task Force was formed when Program Managers from the Department of Energy (DOE), the National Aeronautics and Space Administration (N…
Inhomogeneous Reionization Models in Cosmological Hydrodynamical Simulations
Jose Oñorbe, F. B. Davies, Z. Lukić +2
In this work we present a new hybrid method to simulate the thermal effects of the reionization in cosmological hydrodynamical simulations. The method improves upon the standard ap…
A New Measurement of the Temperature Density Relation of the IGM From Voigt Profile Fitting
Hector Hiss, Michael Walther, Joseph F. Hennawi +3
We decompose the Lyman-α (Lyα) forest of an extensive sample of 74 high signal-to-noise ratio and high-resolution quasar spectra into a collection of Voigt profiles. Absorbers loca…
Measurement of the small-scale structure of the intergalactic medium using close quasar pairs
Alberto Rorai, Joseph F. Hennawi, Jose Oñorbe +6
The distribution of diffuse gas in the intergalactic medium (IGM) imprints a series of hydrogen absorption lines on the spectra of distant background quasars known as the Lyman-…
Constraining Reionization with the Lyman- Forest Power Spectrum: the Outlook after Planck
J. Oñorbe, J. F. Hennawi, Z. Lukić +1
The latest measurements of CMB electron scattering optical depth reported by Planck significantly reduces the allowed space of HI reionization models, pointing toward a later endin…
Measuring alignments between galaxies and the cosmic web at using IGM tomography
Alex Krolewski, Khee-Gan Lee, Zarija Lukic +1
Many galaxy formation models predict alignments between galaxy spin and the cosmic web (i.e. the directions of filaments and sheets), leading to intrinsic alignment between galaxie…
Structure Finding in Cosmological Simulations: The State of Affairs
Alexander Knebe, Frazer R. Pearce, Hanni Lux +32
The ever increasing size and complexity of data coming from simulations of cosmic structure formation demands equally sophisticated tools for their analysis. During the past decade…
Haloes gone MAD: The Halo-Finder Comparison Project
Alexander Knebe, Steffen R. Knollmann, Stuart I. Muldrew +34
[abridged] We present a detailed comparison of fundamental dark matter halo properties retrieved by a substantial number of different halo finders. These codes span a wide range of…
Particle mesh simulations of the Lyman-alpha forest and the signature of Baryon Acoustic Oscillations in the intergalactic medium
Martin White, Adrian Pope, Jordan Carlson +5
We present a set of ultra-large particle-mesh simulations of the LyA forest targeted at understanding the imprint of baryon acoustic oscillations (BAO) in the inter-galactic medium…