BATALHA DE CASTRO, TIAGOTIAGOBATALHA DE CASTROBORGANI, STEFANOSTEFANOBORGANIKlaus DolagMARRA, VALERIOVALERIOMARRAMiguel QuartinAlex SaroSEFUSATTI, EmilianoEmilianoSEFUSATTI2022-03-172022-03-1720210035-8711http://hdl.handle.net/20.500.12386/31690Luminous 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.STAMPAenArticle10.1093/mnras/staa34732-s2.0-85099949901http://arxiv.org/abs/2009.01775v2https://academic.oup.com/mnras/article/500/2/2316/59742952021MNRAS.500.2316CFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_14 Cosmology