Publicação: A high precision semi-analytic mass function
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In this paper, extending past works of Del Popolo, we show how a high precision mass function (MF) can be obtained using the excursion set approach and an improved barrier taking implicitly into account a non-zero cosmological constant, the angular momentum acquired by tidal interaction of proto-structures and dynamical friction. In the case of the ΛCDM paradigm, we find that our MF is in agreement at the 3% level to Klypin's Bolshoi simulation, in the mass range Mvir = 5 × 109 h-1Mo - 5 × 1014 h-1Mo and redshift range 0 ≲ z ≲ 10. For z = 0 we also compared our MF to several fitting formulae, and found in particular agreement with Bhattacharya's within 3% in the mass range 1012-1016 h-1Mo. Moreover, we discuss our MF validity for different cosmologies.
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dark matter theory, galaxy formation
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Inglês
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Journal of Cosmology and Astroparticle Physics, v. 2017, n. 3, 2017.
