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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31690
Title: On the impact of baryons on the halo mass function, bias, and cluster cosmology
Authors: BATALHA DE CASTRO, TIAGO 
BORGANI, STEFANO 
Klaus Dolag
MARRA, VALERIO 
Miguel Quartin
Alex Saro
SEFUSATTI, Emiliano 
Issue Date: 2021
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 500
Issue: 2
First Page: 2316
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 halos 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 halos mass function and bias would significantly alter the inference of cosmological parameters from high-sensitivity next-generations surveys of galaxy clusters.
URI: http://hdl.handle.net/20.500.12386/31690
URL: http://arxiv.org/abs/2009.01775v2
https://academic.oup.com/mnras/article/500/2/2316/5974295
ISSN: 0035-8711
DOI: 10.1093/mnras/staa3473
Bibcode ADS: 2021MNRAS.500.2316C
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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