A high precision semi-analytic mass function
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-str...
| Authors: | ; ; |
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| Format: | Article |
| Status: | Published version |
| Publication date: | 2017 |
| Country: | Brasil |
| Institution: | UNESP |
| Repository: | Repositório Institucional da UNESP |
| Language: | English |
| OAI Identifier: | oai:repositorio.unesp.br:11449/174432 |
| Online Access: | http://dx.doi.org/10.1088/1475-7516/2017/03/032 http://hdl.handle.net/11449/174432 |
| Access Level: | Open access |
| Keyword: | dark matter theory galaxy formation |
| Summary: | 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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