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Title: The Borg Cube Simulation: Cosmological Hydrodynamics with CRK-SPH

Abstract

A challenging requirement posed by next-generation observations is a firm theoretical grasp of the impact of baryons on structure formation. Cosmological hydrodynamic simulations modeling gas physics are vital in this regard. A high degree of modeling flexibility exists in this space, making it important to explore a range of methods in order to gauge the accuracy of simulation predictions. We present results from the first cosmological simulation using Conservative Reproducing Kernel Smoothed Particle Hydrodynamics (CRK-SPH). We employ two simulations: one evolved purely under gravity, and the other with nonradiative hydrodynamics. Each contains 2 × 23043 cold dark matter plus baryon particles in an 800 h-1Mpc box. We compare statistics to previous nonradiative simulations including power spectra, mass functions, baryon fractions, and concentration. We find self-similar radial profiles of gas temperature, entropy, and pressure and show that a simple analytic model recovers these results to better than 40% over two orders of magnitude in mass. We quantify the level of nonthermal pressure support in halos and demonstrate that hydrostatic mass estimates are biased low by 24% (10%) for halos of mass 1015 (1013) h-1 M⊙. Here, we compute angular power spectra for the thermal and kinematic Sunyaev–Zel’dovich effects and find goodmore » agreement with the low-ℓ Planck measurements. Finally, artificial scattering between particles of unequal mass is shown to have a large impact on the gravity-only run, and we highlight the importance of better understanding this issue in hydrodynamic applications. This is the first in a simulation campaign using CRK-SPH, with future work including subresolution gas treatments.« less

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [3];  [4];  [1];  [5]
  1. Argonne National Lab. (ANL), Lemont, IL (United States). ALCF Division
  2. Argonne National Lab. (ANL), Lemont, IL (United States). HEP Division; Univ. of Chicago, Chicago, IL (United States). Dept. of Physics
  3. Argonne National Lab. (ANL), Lemont, IL (United States). HEP Division; Argonne National Lab. (ANL), Lemont, IL (United States). MCS Division
  4. Argonne National Lab. (ANL), Lemont, IL (United States). HEP Division
  5. Argonne National Lab. (ANL), Lemont, IL (United States). CPS Division
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1542643
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
Journal Name: The Astrophysical Journal (Online); Journal Volume: 877; Journal Issue: 2; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; cosmology: theory; hydrodynamics; large-scale structure; methods: numerical

Citation Formats

Emberson, J. D., Frontiere, Nicholas, Habib, Salman, Heitmann, Katrin, Larsen, Patricia, Finkel, Hal, and Pope, Adrian. The Borg Cube Simulation: Cosmological Hydrodynamics with CRK-SPH. United States: N. p., 2019. Web. doi:10.3847/1538-4357/ab1b31.
Emberson, J. D., Frontiere, Nicholas, Habib, Salman, Heitmann, Katrin, Larsen, Patricia, Finkel, Hal, & Pope, Adrian. The Borg Cube Simulation: Cosmological Hydrodynamics with CRK-SPH. United States. https://doi.org/10.3847/1538-4357/ab1b31
Emberson, J. D., Frontiere, Nicholas, Habib, Salman, Heitmann, Katrin, Larsen, Patricia, Finkel, Hal, and Pope, Adrian. Wed . "The Borg Cube Simulation: Cosmological Hydrodynamics with CRK-SPH". United States. https://doi.org/10.3847/1538-4357/ab1b31. https://www.osti.gov/servlets/purl/1542643.
@article{osti_1542643,
title = {The Borg Cube Simulation: Cosmological Hydrodynamics with CRK-SPH},
author = {Emberson, J. D. and Frontiere, Nicholas and Habib, Salman and Heitmann, Katrin and Larsen, Patricia and Finkel, Hal and Pope, Adrian},
abstractNote = {A challenging requirement posed by next-generation observations is a firm theoretical grasp of the impact of baryons on structure formation. Cosmological hydrodynamic simulations modeling gas physics are vital in this regard. A high degree of modeling flexibility exists in this space, making it important to explore a range of methods in order to gauge the accuracy of simulation predictions. We present results from the first cosmological simulation using Conservative Reproducing Kernel Smoothed Particle Hydrodynamics (CRK-SPH). We employ two simulations: one evolved purely under gravity, and the other with nonradiative hydrodynamics. Each contains 2 × 23043 cold dark matter plus baryon particles in an 800 h-1Mpc box. We compare statistics to previous nonradiative simulations including power spectra, mass functions, baryon fractions, and concentration. We find self-similar radial profiles of gas temperature, entropy, and pressure and show that a simple analytic model recovers these results to better than 40% over two orders of magnitude in mass. We quantify the level of nonthermal pressure support in halos and demonstrate that hydrostatic mass estimates are biased low by 24% (10%) for halos of mass 1015 (1013) h-1 M⊙. Here, we compute angular power spectra for the thermal and kinematic Sunyaev–Zel’dovich effects and find good agreement with the low-ℓ Planck measurements. Finally, artificial scattering between particles of unequal mass is shown to have a large impact on the gravity-only run, and we highlight the importance of better understanding this issue in hydrodynamic applications. This is the first in a simulation campaign using CRK-SPH, with future work including subresolution gas treatments.},
doi = {10.3847/1538-4357/ab1b31},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 877,
place = {United States},
year = {Wed May 29 00:00:00 EDT 2019},
month = {Wed May 29 00:00:00 EDT 2019}
}

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journal, September 2016


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text, January 2008


Impact of Cluster Physics on the Sunyaev-Zel'dovich Power Spectrum
text, January 2010


Deconstructing the kinetic SZ Power Spectrum
text, January 2011


The gas distribution in the outer regions of galaxy clusters
text, January 2011


Evolution of the Merger Induced Hydrostatic Mass Bias in Galaxy Clusters
text, January 2011


The Baryon Oscillation Spectroscopic Survey of SDSS-III
text, January 2012


The Atacama Cosmology Telescope: likelihood for small-scale CMB data
text, January 2013


Planck 2013 results. I. Overview of products and scientific results
text, January 2013


Enzo: An Adaptive Mesh Refinement Code for Astrophysics
text, January 2013


HACC: Simulating Sky Surveys on State-of-the-Art Supercomputing Architectures
text, January 2014


Planck 2015 results. XXII. A map of the thermal Sunyaev-Zeldovich effect
text, January 2015


The Mira-Titan Universe: Precision Predictions for Dark Energy Surveys
text, January 2015


Simulations of the Pairwise Kinematic Sunyaev-Zel'dovich Signal
text, January 2015


Accurate initial conditions in mixed Dark Matter--Baryon simulations
text, January 2016


First results from the IllustrisTNG simulations: matter and galaxy clustering
text, January 2017


Modelling Baryonic Effects on Galaxy Cluster Mass Profiles
text, January 2017


Two-Body Relaxation in Cosmological Simulations
text, January 2001


A Universal Temperature Profile for Galaxy Clusters
text, January 2002


The radial structure of galaxy groups and clusters
text, January 2003


A dynamical model for the distribution of dark matter and gas in galaxy clusters
text, January 2003


Cosmological simulations of the intracluster medium
text, January 2004


Supersonic Motions of Galaxies in Clusters
text, January 2004


The influence of non-uniform reionization on the CMB
text, January 2005


The baryon fraction in hydrodynamical simulations of galaxy clusters
text, January 2005


The baseline intracluster entropy profile from gravitational structure formation
text, January 2005


The influence of baryons on the clustering of matter and weak lensing surveys
text, January 2005


Shape, spin and baryon fraction of clusters in the MareNostrum Universe
text, January 2007


Effects of Baryons and Dissipation on the Matter Power Spectrum
text, January 2007


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