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The halo MASS-BIAS redshift evolution in the ΛCDM cosmology
Manolis Plionis
Acceso Abierto
We derive an analytic model for the redshift evolution of linear-bias, allowing for interactions and merging of the mass-tracers, by solving a second order differential equation based on linear perturbation theory and the Friedmann-Lemaitre solutions of the cosmological field equations. We then study the halomass dependence of the bias evolution, using the dark matter halo distribution in a ΛCDM simulation in order to calibrate the free parameters of the model. Finally, we compare our theoretical predictions with available observational data and find a good agreement. In particular, we find that the bias of optical QSO’s evolve differently than those selected in X-rays and that their corresponding typical dark matter halo mass is ∼ 10¹³ h⁻¹ Mꙩ and ≿5 × 10¹³ h⁻¹ Mꙩ, respectively.
The astrophysical journal
Público en general
Basilakos, S., et al., (2008). The halo MASS-BIAS redshift evolution in the ΛCDM cosmology, The astrophysical journal. Vol.678(2):627-634
Versión aceptada
acceptedVersion - Versión aceptada
Appears in Collections:Artículos de Astrofísica

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