TY - JOUR
T1 - Boundless baryons
T2 - how diffuse gas contributes to anisotropic tSZ signal around simulated Three Hundred clusters
AU - Lokken, Martine
AU - Cui, Weiguang
AU - Bond, J. Richard
AU - Hložek, Renée
AU - Murray, Norman
AU - Davé, Romeel
AU - van Engelen, Alexander
N1 - Funding Information:
The authors thank the anonymous referee for a thorough and helpful review of the manuscript. This work has been made possible by the ‘The Three Hundred’ collaboration,8 which has received financial support from the European Union’s Horizon 2020 - Research and Innovation Framework Programme under the Marie Sklodowskaw-Curie grant agreement number 734374, i.e. the LACEGAL project. The simulations used in this paper have been performed in the MareNostrum Supercomputer at the Barcelona Supercomputing centre, thanks to CPU time granted by the Red Espanola de Supercomputación. The CosmoSim data base used in this paper is a service by the Leibniz-Institute for Astrophysics Potsdam (AIP). The MultiDark data base was developed in cooperation with the Spanish MultiDark Consolider Project CSD2009-00064. ML acknowledges support from the Natural Sciences and Engineering Research Council of Canada Postgraduate Scholarships – Doctoral. ML also thanks Karen Scora for coming up with the alliterative title. WC is supported by the STFC AGP grant ST/V000594/1 and the Atracción de Talento contract no. 2020-T1/TIC-19882 granted by the Comunidad de Madrid in Spain. He also thanks the Ministerio de Ciencia e Innovación (Spain) for financial support under project grant PID2021-122603NB-C21. He further acknowledges the science research grants from the China Manned Space Project with nos. CMS-CSST-2021-A01 and CMS-CSST-2021-B01. JRB’s research was funded by the Natural Sciences and Engineering Research Council of Canada Discovery Grant Program and a fellowship from the Canadian Institute for Advanced Research (CIFAR) Gravity and Extreme Universe program. RH is a CIFAR Azrieli Global Scholar, Gravity & the Extreme Universe Program, 2019, and a 2020 Alfred P. Sloan Research Fellow. RH is supported by Natural Sciences and Engineering Research Council of Canada Discovery Grant Program and the Connaught Fund.
Funding Information:
RH is a CIFAR Azrieli Global Scholar, Gravity & the Extreme Universe Program, 2019, and a 2020 Alfred P. Sloan Research Fellow. RH is supported by Natural Sciences and Engineering Research Council of Canada Discovery Grant Program and the Connaught Fund.
Funding Information:
JRB’s research was funded by the Natural Sciences and Engineering Research Council of Canada Discovery Grant Program and a fellowship from the Canadian Institute for Advanced Research (CIFAR) Gravity and Extreme Universe program.
Funding Information:
WC is supported by the STFC AGP grant ST/V000594/1 and the Atracción de Talento contract no. 2020-T1/TIC-19882 granted by the Comunidad de Madrid in Spain. He also thanks the Ministerio de Ciencia e Innovación (Spain) for financial support under project grant PID2021-122603NB-C21. He further acknowledges the science research grants from the China Manned Space Project with nos. CMS-CSST-2021-A01 and CMS-CSST-2021-B01.
Funding Information:
This work has been made possible by the ‘The Three Hundred’ collaboration, which has received financial support from the European Union’s Horizon 2020 - Research and Innovation Framework Programme under the Marie Sklodowskaw-Curie grant agreement number 734374, i.e. the LACEGAL project. The simulations used in this paper have been performed in the MareNostrum Supercomputer at the Barcelona Supercomputing centre, thanks to CPU time granted by the Red Espaola de Supercomputacin. The CosmoSim data base used in this paper is a service by the Leibniz-Institute for Astrophysics Potsdam (AIP). The MultiDark data base was developed in cooperation with the Spanish MultiDark Consolider Project CSD2009-00064.
Publisher Copyright:
© 2023 The Author(s)
PY - 2023/7/1
Y1 - 2023/7/1
N2 - Upcoming advances in galaxy surveys and cosmic microwave background data will enable measurements of the anisotropic distribution of diffuse gas in filaments and superclusters at redshift z = 1 and beyond, observed through the thermal Sunyaev–Zel’dovich (tSZ) effect. These measurements will help distinguish between different astrophysical feedback models, account for baryons that appear to be ‘missing’ from the cosmic census, and present opportunities for using locally anisotropic tSZ statistics as cosmological probes. This study seeks to guide such future measurements by analysing whether diffuse intergalactic gas is a major contributor to anisotropic tSZ signal in THE THREE HUNDRED GIZMO-SIMBA hydrodynamic simulations. We apply multiple different halo boundary and temperature criteria to divide concentrated from diffuse gas at z = 1, then create mock Compton- y maps for the separated components. The maps from 98 simulation snapshots are centred on massive galaxy clusters, oriented by the most prominent filament axis in the galaxy distribution, and stacked. Results vary significantly depending on the definition used for diffuse gas, indicating that assumptions should be clearly defined when claiming observations of the warm-hot intergalactic medium. In all cases, the diffuse gas is important, contributing 25–60 per cent of the tSZ signal in the far field (>4 h−1 comoving Mpc) from the stacked clusters. The gas 1–2 virial radii from halo centres is especially key. Oriented stacking and environmental selections help to amplify the signal from the warm-hot intergalactic medium, which is aligned but less concentrated along the filament axis than the hot halo gas.
AB - Upcoming advances in galaxy surveys and cosmic microwave background data will enable measurements of the anisotropic distribution of diffuse gas in filaments and superclusters at redshift z = 1 and beyond, observed through the thermal Sunyaev–Zel’dovich (tSZ) effect. These measurements will help distinguish between different astrophysical feedback models, account for baryons that appear to be ‘missing’ from the cosmic census, and present opportunities for using locally anisotropic tSZ statistics as cosmological probes. This study seeks to guide such future measurements by analysing whether diffuse intergalactic gas is a major contributor to anisotropic tSZ signal in THE THREE HUNDRED GIZMO-SIMBA hydrodynamic simulations. We apply multiple different halo boundary and temperature criteria to divide concentrated from diffuse gas at z = 1, then create mock Compton- y maps for the separated components. The maps from 98 simulation snapshots are centred on massive galaxy clusters, oriented by the most prominent filament axis in the galaxy distribution, and stacked. Results vary significantly depending on the definition used for diffuse gas, indicating that assumptions should be clearly defined when claiming observations of the warm-hot intergalactic medium. In all cases, the diffuse gas is important, contributing 25–60 per cent of the tSZ signal in the far field (>4 h−1 comoving Mpc) from the stacked clusters. The gas 1–2 virial radii from halo centres is especially key. Oriented stacking and environmental selections help to amplify the signal from the warm-hot intergalactic medium, which is aligned but less concentrated along the filament axis than the hot halo gas.
KW - hydrodynamics
KW - intergalactic medium
KW - large-scale structure of Universe
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U2 - 10.1093/mnras/stad1414
DO - 10.1093/mnras/stad1414
M3 - Article
AN - SCOPUS:85161644904
SN - 0035-8711
VL - 523
SP - 1346
EP - 1363
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -