PRIYA: A New Suite of Lyman-alpha Forest Simulations for Cosmology

Abstract

We present the PRIYA suite of cosmological simulations, based on the code and hydrodynamic model of the ASTRID simulation, and designed for cosmological analyses of the Lyman-$\alpha$ forest. Our simulation suite spans a $9$-dimensional parameter space, including $4$ cosmological parameters and $5$ astrophysical/thermal parameters. We have run $48$ low fidelity simulations with $1536^3$ particles in a $120$ Mpc/h box and $3$ high fidelity simulations with $3072^3$ particles in a $120$ Mpc/h box. All our simulations include a full physics model for galaxy formation, including supernova and AGN feedback, and thus also contain a realistic population of DLAs. We advance on earlier simulations suites by larger particle loads, by incorporating new physical models for patchy hydrogen and helium reionization, and by self-consistently incorporating a model for AGN feedback. We show that patchy helium reionization imprints an excess in the 1D flux power spectrum on large scales, which may allow future measurements of helium reionization bubble sizes. Simulation parameters are chosen based on a Latin hypercube design and a Gaussian process is used to interpolate to arbitrary parameter combinations. We build a multi-fidelity emulator for the 1D flux power spectrum and the mean IGM temperature. We show that our final interpolation error is $<1\%$ and that our simulations produce a flux power spectrum converged at the percent level for $z=5.4$ - $2.2$. Our simulation suite will be used to interpret Lyman-$\alpha$ forest 1D flux power spectra from SDSS and future DESI data releases.

25 pages, 11 figures, matches version published in JCAP

References in corpus (30)

• Properties of galaxies reproduced by a hydrodynamic simulation
• Simulating galaxy formation with black hole driven thermal and kinetic feedback
• Simba: Cosmological Simulations with Black Hole Growth and Feedback
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• The Cosmic Linear Anisotropy Solving System (CLASS) I: Overview
• HeII Reionization and its Effect on the IGM
• Line-Intensity Mapping: 2017 Status Report
• Possible evidence for an inverted temperature-density relation in the intergalactic medium from the flux distribution of the Lyman-alpha forest
• An improved measurement of the flux distribution of the Ly-alpha forest in QSO absorption spectra: the effect of continuum fitting, metal contamination and noise properties
• Damped Lyman-alpha absorbers as a probe of stellar feedback
• Self-Consistent Modeling of Reionization in Cosmological Hydrodynamical Simulations
• Reproducing the Kinematics of Damped Lyman-alpha Systems
• The Lyman-alpha forest power spectrum from the XQ-100 Legacy Survey
• Long Dark Gaps in the Ly$\beta$ Forest at $z<6$: Evidence of Ultra Late Reionization from XQR-30 Spectra
• Scale-dependent bias in the BAO-scale intergalactic neutral hydrogen
• The Sherwood-Relics simulations: overview and impact of patchy reionization and pressure smoothing on the intergalactic medium
• Constraints on the cosmic expansion rate at redshift 2.3 from the Lyman-$\alpha$ forest
• Compressing the cosmological information in one-dimensional correlations of the Lyman-$\alpha$ forest
• Impact of inhomogeneous reionization on the Lyman-α forest
• Characterizing Protoclusters and Protogroups at z $\sim$ 2.5 Using Ly$\alpha$ Tomography
• Constraints on ionising photon production from the large-scale Lyman-alpha forest
• Efficient long-range AGN feedback affects the low redshift Lyman-$\alpha$ forest
• Modeling the Lyman-$\alpha$ forest with Eulerian and SPH hydrodynamical methods
• A neural network emulator for the Lyman-$\alpha$ 1D flux power spectrum
• The Sejong Suite: Cosmological Hydrodynamical Simulations with Massive Neutrinos, Dark Radiation, and Warm Dark Matter
• Planting a Lyman alpha forest on AbacusSummit
• Impact of Massive Neutrinos and Dark Radiation on the High-redshift Cosmic Web. I. Lyman-Alpha Forest Observables
• A Multi-Fidelity Emulator for the Lyman-$\alpha$ Forest Flux Power Spectrum
• Boosting Line Intensity Map Signal-to-Noise with the Ly-$\alpha$ Forest Cross-Correlation
• An Exploration of AGN and Stellar Feedback Effects in the Intergalactic Medium via the Low Redshift Lyman-$\alpha$ Forest

Cited by in corpus (14)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• $5\sigma$ tension between Planck cosmic microwave background and eBOSS Lyman-alpha forest and constraints on physics beyond $\Lambda$CDM
• Cosmological Constraints from the eBOSS Lyman-$\alpha$ Forest using the PRIYA Simulations
• Fresh Look at Neutrino Self-Interactions With the Lyman-$\alpha$ Forest: Constraints from EFT and PRIYA Simulations
• Constraining Mixed Dark Matter models with high redshift Lyman-alpha forest data
• Deep learning-driven likelihood-free parameter inference for 21-cm forest observations
• Modeling Post-Reionization HI Distributions in Fuzzy Dark Matter Cosmologies Using Conditional Normalizing Flows
• Signatures of Very Early Dark Energy in the Matter Power Spectrum
• Probing the cosmic web in Ly$\alpha$ emission over large scales: an Intensity Mapping forecast for DECaLS/BASS and DESI
• The Compressed 3D Lyman-Alpha Forest Bispectrum
• ForestFlow: predicting the Lyman-$\alpha$ forest clustering from linear to nonlinear scales
• Design and optimization of neural networks for multifidelity cosmological emulation
• Modeling the Cosmological Lyman-$\alpha$ Forest at the Field Level
• Neural network emulator to constrain the high-$z$ IGM thermal state from Lyman-$\alpha$ forest flux auto-correlation function