22–26 Aug 2022
Rio de Janeiro
America/Sao_Paulo timezone

The cosmology dependence of the concentration-mass-redshift relation

Not scheduled
20m
Rio de Janeiro

Rio de Janeiro

Vice-Governador Rúbens Berardo street, 100 - Gávea Rio de Janeiro - 22451-070
Plenary/Parallel talk Poster session

Speaker

Daniel López

Description

The concentrations of dark matter haloes provide crucial information about their internal structure and how it depends on mass and redshift -- the so-called $c(M,z)$ relation. I will present an extensive study of the cosmology-dependence of halo concentrations based on a suite of 72 dark matter-only simulations in which the following cosmological parameters are varied: $\sigma_{8}$, $\Omega_{\mathrm{M}}$, $\Omega_{\mathrm{b}}$, $n_{\mathrm{s}}$, $h$, $M_{\nu}$, $w_{0}$ and $w_{\mathrm{a}}$. I will analyze how different cosmological parameters impact the values of the concentrations for different halo masses and redshifts. In agreement with previous work, and for all cosmologies studied, there exists a tight correlation between the characteristic densities of dark matter haloes and the critical density of the Universe at suitably defined formation time. This finding, when combined with excursion set modeling of halo formation histories, allows us to accurately predict the concentrations of dark matter haloes for arbitrary masses, redshifts, and values of the cosmological parameters.

Primary author

Co-authors

Dr Raul Angulo (DIPC) Dr Aaron Ludlow (UWA)

Presentation materials

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