IA/U.Lisboa Seminar - Finding a high precision semi-analytic mass function - 10 julho 2017

I will discuss our paper that extends past works of Del Popolo that obtained a high precision mass function 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 ΛCDM paradigm, we found that our MF is in agreement at the 3% level to Klypin’s Bolshoi simulation, in the mass range  M_vir = 5 X 10⁹ h⁻¹ M_sun — 5 X 10¹⁴ h⁻¹ M_sun 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⁻¹ M_sun.