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  Detection of anti-correlation of hot and cold baryons in galaxy clusters

Farahi, A., Mulroy, S. L., Evrard, A. E., Smith, G. P., Finoguenov, A., Bourdin, H., et al. (2019). Detection of anti-correlation of hot and cold baryons in galaxy clusters. Nature Communications, 10: 2504. doi:10.1038/s41467-019-10471-y.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-8CE8-9 Version Permalink: http://hdl.handle.net/21.11116/0000-0004-8CE9-8
Genre: Journal Article

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 Creators:
Farahi, Arya, Author
Mulroy, Sarah L., Author
Evrard, August E., Author
Smith, Graham P., Author
Finoguenov, Alexis1, Author              
Bourdin, Hervé, Author
Carlstrom, John E., Author
Haines, Chris P., Author
Marrone, Daniel P., Author
Martino, Rossella, Author
Mazzotta, Pasquale, Author
Okabe, Christine O’Donnell Nobuhiro, Author
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1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: The largest clusters of galaxies in the Universe contain vast amounts of dark matter, plus baryonic matter in two principal phases, a majority hot gas component and a minority cold stellar phase comprising stars, compact objects, and low-temperature gas. Hydrodynamic simulations indicate that the highest-mass systems retain the cosmic fraction of baryons, a natural consequence of which is anti-correlation between the masses of hot gas and stars within dark matter halos of fixed total mass. We report observational detection of this anti-correlation based on 4 elements of a 9 × 9-element covariance matrix for nine cluster properties, measured from multi-wavelength observations of 41 clusters from the Local Cluster Substructure Survey. These clusters were selected using explicit and quantitative selection rules that were then encoded in our hierarchical Bayesian model. Our detection of anti-correlation is consistent with predictions from contemporary hydrodynamic cosmological simulations that were not tuned to reproduce this signal.

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 Dates: 2019-07-02
 Publication Status: Published online
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 Rev. Method: -
 Identifiers: DOI: 10.1038/s41467-019-10471-y
Other: LOCALID: 3156156
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 10 Sequence Number: 2504 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723