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  On the impact of baryons on the halo mass function, bias, and cluster cosmology

Castro, T., Borgani, S., Dolag, K., Marra, V., Quartin, M., Saro, A., et al. (2020). On the impact of baryons on the halo mass function, bias, and cluster cosmology. Monthly Notices of the Royal Astronomical Society, 500(2), 2316-2335. doi:10.1093/mnras/staa3473.

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Castro, Tiago, Author
Borgani, Stefano, Author
Dolag, Klaus1, Author              
Marra, Valerio, Author
Quartin, Miguel, Author
Saro, Alexandro, Author
Sefusatti, Emiliano, Author
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1Computational Structure Formation, MPI for Astrophysics, Max Planck Society, ou_2205642              

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 Abstract: Luminous matter produces very energetic events, such as active galactic nuclei and supernova explosions, that significantly affect the internal regions of galaxy clusters. Although the current uncertainty in the effect of baryonic physics on cluster statistics is subdominant as compared to other systematics, the picture is likely to change soon as the amount of high-quality data is growing fast, urging the community to keep theoretical systematic uncertainties below the ever-growing statistical precision. In this paper, we study the effect of baryons on galaxy clusters, and their impact on the cosmological applications of clusters, using the magneticum suite of cosmological hydrodynamical simulations. We show that the impact of baryons on the halo mass function can be recast in terms on a variation of the mass of the haloes simulated with pure N-body, when baryonic effects are included. The halo mass function and halo bias are only indirectly affected. Finally, we demonstrate that neglecting baryonic effects on haloes mass function and bias would significantly alter the inference of cosmological parameters from high-sensitivity next-generations surveys of galaxy clusters.

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 Dates: 2020-11-10
 Publication Status: Published online
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/staa3473
Other: LOCALID: 3291364
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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 500 (2) Sequence Number: - Start / End Page: 2316 - 2335 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150