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Finding a high precision semi-analytic mass function

Morgan Le Delliou
Instituto de Fısica Teorica, Universidade Estadual de Sao Paulo, Brazil

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  Mvir = 5 X 109 h−1 Msun — 5 X 1014 h−1 Msun 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 Msun.

2017 July 10, 12:00

Faculdade de CiÍncias da Universidade de Lisboa (C6.2.51)
Campo Grande, 1749-016 Lisboa

Instituto de Astrof√≠sica e Ci√™ncias do Espa√ßo Universidade do Porto Faculdade de Ciências da Universidade de Lisboa Funda√ß√£o para a Ci√™ncia e a Tecnologia