The signature of dark energy perturbations in galaxy cluster surveys (2009)
- Authors:
- Autor USP: ABRAMO, LUIS RAUL WEBER - IF
- Unidade: IF
- DOI: 10.1088/1475-7516/2009/07/040
- Subjects: GALÁXIAS; MATÉRIA ESCURA
- Language: Inglês
- Abstract: Models of dynamical dark energy unavoidably possess fluctuations in the energy density and pressure of that new component. In this paper we estimate the impact of dark energy fluctuations on the number of galaxy clusters in the Universe using a generalization of the spherical collapse model and the Press-Schechter formalism. The observations we consider are several hypothetical Sunyaev-Zel’dovich and weak lensing (shear maps) cluster surveys, with limiting masses similar to ongoing (SPT, DES) as well as future (LSST, Euclid) surveys. Our statistical analysis is performed in a 7-dimensional cosmological parameter space using the Fisher matrix method. We find that, in some scenarios, the impact of these fluctuations is large enough that their effect could already be detected by existing instruments such as the South Pole Telescope, when priors from other standard cosmological probes are included. We also show how dark energy fluctuations can be a nuisance for constraining cosmological parameters with cluster counts, and point to a degeneracy between the parameter that describes dark energy pressure on small scales (the effective sound speed) and the parameters describing its equation of state
- Imprenta:
- Source:
- Título do periódico: Journal of Cosmology and Astroparticle Physics
- ISSN: 1475-7516
- Volume/Número/Paginação/Ano: v. 07, n. 040, p. 1-13, 2009
- Este periódico é de assinatura
- Este artigo é de acesso aberto
- URL de acesso aberto
- Cor do Acesso Aberto: green
-
ABNT
ABRAMO, Luis Raul Weber e BATISTA, R C e ROSENFELD, Rogerio. The signature of dark energy perturbations in galaxy cluster surveys. Journal of Cosmology and Astroparticle Physics, v. 07, n. 040, p. 1-13, 2009Tradução . . Disponível em: https://doi.org/10.1088/1475-7516/2009/07/040. Acesso em: 30 abr. 2024. -
APA
Abramo, L. R. W., Batista, R. C., & Rosenfeld, R. (2009). The signature of dark energy perturbations in galaxy cluster surveys. Journal of Cosmology and Astroparticle Physics, 07( 040), 1-13. doi:10.1088/1475-7516/2009/07/040 -
NLM
Abramo LRW, Batista RC, Rosenfeld R. The signature of dark energy perturbations in galaxy cluster surveys [Internet]. Journal of Cosmology and Astroparticle Physics. 2009 ; 07( 040): 1-13.[citado 2024 abr. 30 ] Available from: https://doi.org/10.1088/1475-7516/2009/07/040 -
Vancouver
Abramo LRW, Batista RC, Rosenfeld R. The signature of dark energy perturbations in galaxy cluster surveys [Internet]. Journal of Cosmology and Astroparticle Physics. 2009 ; 07( 040): 1-13.[citado 2024 abr. 30 ] Available from: https://doi.org/10.1088/1475-7516/2009/07/040 - Can the local supercluster explain the low CBM multipoles?
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Informações sobre o DOI: 10.1088/1475-7516/2009/07/040 (Fonte: oaDOI API)
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