Evolution of the Thermodynamic Properties of Clusters of Galaxies out to Redshift of 1.8
Name
Ghirardini_2021_ApJ_910_14.pdf
Description
Published version
Size
4.46 MB
Format
Adobe PDF
Checksum (MD5)
4b620c040030c65a3e8a2854bac49e65
Author(s)
Ghirardini, Vittorio
Bulbul, Esra
Kraft, Ralph
Bayliss, Matt
Benson, Bradford
Bleem, Lindsey
Bocquet, Sebastian
Calzadilla, Micheal
Eckert, Dominique
Forman, William
Date Issued
2021
Journal
Astrophysical Journal
Publisher
American Astronomical Society
Citation
Ghirardini, Vittorio, Bulbul, Esra, Kraft, Ralph, Bayliss, Matt, Benson, Bradford et al. 2021. "Evolution of the Thermodynamic Properties of Clusters of Galaxies out to Redshift of 1.8." Astrophysical Journal, 910 (1).
Version
Final published version
Abstract
Abstract
The thermodynamic properties of the hot plasma in galaxy clusters retain information on the processes leading to the formation and evolution of the gas in their deep, dark matter potential wells. These processes are dictated not only by gravity but also by gas physics, e.g., active galactic nucleus feedback and turbulence. In this work, we study the thermodynamic properties, e.g., density, temperature, pressure, and entropy, of the most massive and the most distant (seven clusters at z > 1.2) clusters selected by the South Pole Telescope and compare them with those of the nearby clusters (13 clusters at z < 0.1) to constrain their evolution as a function of time and radius. We find that thermodynamic properties in the outskirts of high-redshift clusters are remarkably similar to the low-redshift clusters, and their evolution follows the prediction of the self-similar model. Their intrinsic scatter is larger, indicating that the physical properties that lead to the formation and virialization of cluster outskirts show evolving variance. On the other hand, thermodynamic properties in the cluster cores deviate significantly from self-similarity, indicating that the processes that regulate the core are already in place in these very high redshift clusters. This result is supported by the unevolving physical scatter of all thermodynamic quantities in cluster cores.
The thermodynamic properties of the hot plasma in galaxy clusters retain information on the processes leading to the formation and evolution of the gas in their deep, dark matter potential wells. These processes are dictated not only by gravity but also by gas physics, e.g., active galactic nucleus feedback and turbulence. In this work, we study the thermodynamic properties, e.g., density, temperature, pressure, and entropy, of the most massive and the most distant (seven clusters at z > 1.2) clusters selected by the South Pole Telescope and compare them with those of the nearby clusters (13 clusters at z < 0.1) to constrain their evolution as a function of time and radius. We find that thermodynamic properties in the outskirts of high-redshift clusters are remarkably similar to the low-redshift clusters, and their evolution follows the prediction of the self-similar model. Their intrinsic scatter is larger, indicating that the physical properties that lead to the formation and virialization of cluster outskirts show evolving variance. On the other hand, thermodynamic properties in the cluster cores deviate significantly from self-similarity, indicating that the processes that regulate the core are already in place in these very high redshift clusters. This result is supported by the unevolving physical scatter of all thermodynamic quantities in cluster cores.
MIT Department
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.3847/1538-4357/ABC68D
