Scaling of the 1-halo terms with bias

Autor(es)

Raul Abramo, L. ^[1] ; Balmes, Irene ^[1] ; Lacasa, Fabien ^{[2, 3]} ; Lima, Marcos ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, Dept Fis Matemat, BR-05314970 Sao Paulo - Brazil

^[2] Univ Estadual Paulista, UNESP, Inst Fis Teor, BR-01140070 Sao Paulo, SP - Brazil

^[3] Univ Estadual Paulista, UNESP, ICTP South Amer Inst Fundamental Res, BR-01140070 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Monthly Notices of the Royal Astronomical Society; v. 454, n. 3, p. 2844-2854, DEC 11 2015.
• Citações Web of Science: 3

Resumo

In the Halo Model, galaxies are hosted by dark matter haloes, while the haloes themselves are biased tracers of the underlying matter distribution. Measurements of galaxy correlation functions include contributions both from galaxies in different haloes, and from galaxies in the same halo (the so-called one-halo terms). We show that, for highly biased tracers, the one-halo term of the power spectrum obeys a steep scaling relation in terms of bias. We also show that the one-halo term of the trispectrum has a steep scaling with bias. The steepness of these scaling relations is such that the one-halo terms can become key contributions to the n-point correlation functions, even at large scales. We interpret these results through analytical arguments and semi-analytical calculations in terms of the statistical properties of haloes. (AU)

• Processo FAPESP: 13/19936-6 - Cosmologia observacional e a radiação cósmica de fundo em micro-ondas
• Beneficiário: Fabien Lacasa
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/21069-9 - Retardamento de sinais em sistemas com lentes gravitacionais e perfis de halos de matéria escura
• Beneficiário: Irène Balmes
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado