Constraining dark energy with cross-correlated CMB and large scale structure data
Résumé
We investigate the possibility of constraining dark energy with the Integrated Sachs Wolfe effect recently detected by cross-correlating the WMAP maps with several Large Scale Structure surveys. In agreement with previous works, we found that, under the assumption of a flat universe, the ISW signal is a promising tool for constraining dark energy. Current available data put weak limits on a constant dark energy equation of state w. We also find no constraints on the dark energy sound speed c_e^2. For quintessence-like dark energy (c_e^2=1) we find w<-0.53, while tighter bounds are possible only if the dark energy is ``clustered'' (c_e^2=0), in such a case -1.94
Domaines
Astrophysique [astro-ph]
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https://hal.sorbonne-universite.fr/hal-02485284
Soumis le : jeudi 20 février 2020-09:28:00
Dernière modification le : vendredi 19 avril 2024-16:18:54
Archivage à long terme le : jeudi 21 mai 2020-13:03:16
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Identifiants
- HAL Id : hal-02485284 , version 1
- ARXIV : astro-ph/0504115
- DOI : 10.1103/PhysRevD.71.123521
Citer
P.S. Corasaniti, T. Giannantonio, A. Melchiorri. Constraining dark energy with cross-correlated CMB and large scale structure data. Physical Review D, 2005, 71 (12), pp.123521. ⟨10.1103/PhysRevD.71.123521⟩. ⟨hal-02485284⟩
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