### Résumé

langue originale | Anglais |
---|---|

titre | AIP Conference Proceedings |

Pages | 804-810 |

Nombre de pages | 7 |

Volume | 1241 |

Les DOIs | |

état | Publié - 1 janv. 2010 |

### Empreinte digitale

### Citer ceci

*AIP Conference Proceedings*(Vol 1241, p. 804-810) https://doi.org/10.1063/1.3462720

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*AIP Conference Proceedings.*VOL. 1241, p. 804-810. https://doi.org/10.1063/1.3462720

**Imprints of dark energy on structure formation : No universality in mass functions?** / Courtin, J.; Alimi, J.-M.; Rasera, Y.; Corasaniti, P.-S.; Fuzfa, A.; Boucher, V.

Résultats de recherche: Contribution dans un livre/un catalogue/un rapport/dans les actes d'une conférence › Contribution à un catalogue

TY - CHAP

T1 - Imprints of dark energy on structure formation

T2 - No universality in mass functions?

AU - Courtin, J.

AU - Alimi, J.-M.

AU - Rasera, Y.

AU - Corasaniti, P.-S.

AU - Fuzfa, A.

AU - Boucher, V.

PY - 2010/1/1

Y1 - 2010/1/1

N2 - In this proceedings for the invisible universe conference, we present our results on the imprints of dark energy on structure formation [4]. This article follows the one of Rasera et al. [10] which features the imprints of dark energy on the non linear power spectrum [2]. In this proceedings, we focus on the non linear imprints of dark energy on the mass functions and question the Jenkins et al. approximation of the universality of mass functions in the context of dark energies [6]. We first calculate the critical density formation threshold δ(z) and the overdensity detection parameter Δ(z) for dark energy cosmologies, using the spherical collapse model. We show that these non linear parameters keep a record of the history of the universe expansion and in particular that these parameters are quantitatively modified by the recent acceleration, driven by the dark energy. We show that the consequences on the mass functions should be detected in numerical simulations. In the second section, we present our dark energy models, the numerical setup and discuss the numerical checks that were necessary to guarantee a relevant precision for the purpose of detecting dark imprints on the mass functions. In the third section, we present our numerical results. We show that a different nature of the dark energy, or a variation of the quantity of dark energy in the universe, can lead to more than 20% deviations of mass functions to a universal behavior. We then quantitatively explain these deviations on the basis of the non linear parameters and give a parameterisation for the detection parameter that permits a unique prediction of the dark energy cosmologies mass functions up to a precision of 5% (Courtin et al. [4]). We finally conclude.

AB - In this proceedings for the invisible universe conference, we present our results on the imprints of dark energy on structure formation [4]. This article follows the one of Rasera et al. [10] which features the imprints of dark energy on the non linear power spectrum [2]. In this proceedings, we focus on the non linear imprints of dark energy on the mass functions and question the Jenkins et al. approximation of the universality of mass functions in the context of dark energies [6]. We first calculate the critical density formation threshold δ(z) and the overdensity detection parameter Δ(z) for dark energy cosmologies, using the spherical collapse model. We show that these non linear parameters keep a record of the history of the universe expansion and in particular that these parameters are quantitatively modified by the recent acceleration, driven by the dark energy. We show that the consequences on the mass functions should be detected in numerical simulations. In the second section, we present our dark energy models, the numerical setup and discuss the numerical checks that were necessary to guarantee a relevant precision for the purpose of detecting dark imprints on the mass functions. In the third section, we present our numerical results. We show that a different nature of the dark energy, or a variation of the quantity of dark energy in the universe, can lead to more than 20% deviations of mass functions to a universal behavior. We then quantitatively explain these deviations on the basis of the non linear parameters and give a parameterisation for the detection parameter that permits a unique prediction of the dark energy cosmologies mass functions up to a precision of 5% (Courtin et al. [4]). We finally conclude.

UR - http://www.scopus.com/inward/record.url?scp=77955694463&partnerID=8YFLogxK

U2 - 10.1063/1.3462720

DO - 10.1063/1.3462720

M3 - Catalog chapter contribution

AN - SCOPUS:77955694463

VL - 1241

SP - 804

EP - 810

BT - AIP Conference Proceedings

ER -