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HYPHY: Deep Generative Conditional Posterior Mapping of Hydrodynamical Physics

Journal Article · · The Astrophysical Journal
 [1];  [2];  [3];  [3]
  1. Princeton Univ., NJ (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  2. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  3. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
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Generating large-volume hydrodynamical simulations for cosmological observables is a computationally demanding task necessary for next-generation observations. In this work, we construct a novel fully convolutional variational autoencoder (VAE) to synthesize hydrodynamic fields conditioned on dark matter fields from N-body simulations. After training the model on a single hydrodynamical simulation, we are able to probabilistically map new dark-matter-only simulations to corresponding full hydrodynamical outputs. By sampling over the latent space of our VAE, we can generate posterior samples and study the variance of the mapping. We find that our reconstructed field provides an accurate representation of the target hydrodynamical fields as well as reasonable variance estimates. This approach has promise for the rapid generation of mocks as well as for implementation in a full inverse model of observed data.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1986013
Journal Information:
The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 1 Vol. 941; ISSN 0004-637X
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (35)

Recent advances in convolutional neural networks journal May 2018
Planck 2018 results: VI. Cosmological parameters journal September 2020
Properties of gas phases around cosmic filaments atz= 0 in the IllustrisTNG simulation journal May 2021
On the Density of Neutral Hydrogen in Intergalactic Space. journal November 1965
Formation and evolution of X-ray clusters - A hydrodynamic simulation of the intracluster medium journal November 1990
A hydrodynamic approach to cosmology - Methodology journal January 1992
Cosmological Simulations with TreeSPH journal July 1996
The Cosmic Baryon Budget journal August 1998
Effect of Metallicity on X-Ray Emission from the Warm-Hot Intergalactic Medium journal August 2010
Radiative Transfer in a Clumpy Universe. iv. new Synthesis Models of the Cosmic Uv/X-Ray Background journal February 2012
Nyx: A MASSIVELY PARALLEL AMR CODE FOR COMPUTATIONAL COSMOLOGY journal February 2013
Cosmological reconstruction from galaxy light: neural network based light-matter connection journal October 2018
The one-dimensional power spectrum from the SDSS DR14 Lyα forests journal July 2019
Hints, neutrino bounds, and WDM constraints from SDSS DR14 Lyman-α and Planck full-survey data journal April 2020
Simulating intergalactic gas for DESI-like small scale Lymanα forest observations journal April 2021
Equation of state of the photoionized intergalactic medium journal November 1997
Deep generative models for galaxy image simulations journal May 2021
On the evolution of the H i column density distribution in cosmological simulations journal February 2013
The Lyman α forest in optically thin hydrodynamical simulations journal December 2014
Baryons in the Cosmic Web of IllustrisTNG – I: gas in knots, filaments, sheets, and voids journal April 2019
Time-dependent behaviour of quasar proximity zones at z  ∼ 6 journal November 2019
Painting with baryons: augmenting N-body simulations with gas using deep generative models journal May 2019
Strong Bound on Canonical Ultralight Axion Dark Matter from the Lyman-Alpha Forest journal February 2021
The cosmological simulation code gadget-2 journal December 2005
E pur si muove: Galilean-invariant cosmological hydrodynamical simulations on a moving mesh journal January 2010
In situ and in-transit analysis of cosmological simulations journal August 2016
MODELING THE Ly α FOREST IN COLLISIONLESS SIMULATIONS journal August 2016
New Constraints on IGM Thermal Evolution from the Ly α Forest Power Spectrum journal February 2019
Revealing Reionization with the Thermal History of the Intergalactic Medium: New Constraints from the Ly α Flux Power Spectrum journal February 2019
TARDIS. I. A Constrained Reconstruction Approach to Modeling the z ∼ 2.5 Cosmic Web Probed by Ly α Forest Tomography journal December 2019
TARDIS. II. Synergistic Density Reconstruction from Lyα Forest and Spectroscopic Galaxy Surveys with Applications to Protoclusters and the Cosmic Web journal January 2021
HInet: Generating Neutral Hydrogen from Dark Matter with Neural Networks journal July 2021
Fast, High-fidelity Lyα Forests with Convolutional Neural Networks journal April 2022
The AREPO Public Code Release journal June 2020
Deep Neural Network Classifier for Variable Stars with Novelty Detection Capability journal May 2019

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