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Article Dans Une Revue Physical Review Letters Année : 2017

The Linear Point: A cleaner cosmological standard ruler

Stefano Anselmi
  • Fonction : Auteur
Glenn D. Starkman
  • Fonction : Auteur
Ravi K. Sheth
  • Fonction : Auteur
Idit Zehavi
  • Fonction : Auteur

Résumé

We show how a characteristic length scale imprinted in the galaxy two-point correlation function, dubbed the linear point, can serve as a comoving cosmological standard ruler. In contrast to the Baryon Acoustic Oscillation peak location, this scale is constant in redshift and is una ected by nonlinear e ects to within 0:5 percent precision. We measure the location of the linear point in the galaxy correlation function of the LOWZ and CMASS samples from the Twelfth Data Release (DR12) of the Baryon Oscillation Spectroscopic Survey (BOSS) collaboration. We combine our linear-point measurement with cosmic-microwave-background constraints from the Planck satellite to estimate the isotropic-volume distance DV (z), without relying on a model-template or reconstruction method. We nd DV (0:32) = 126428 Mpc and DV (0:57) = 205622 Mpc respectively, consistent with the quoted values from the BOSS collaboration. This remarkable result suggests that all the distance information contained in the baryon acoustic oscillations can be conveniently compressed into the single length associated with the linear point.
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Dates et versions

hal-02462174 , version 1 (31-01-2020)

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Stefano Anselmi, Glenn D. Starkman, Pier-Stefano Corasaniti, Ravi K. Sheth, Idit Zehavi. The Linear Point: A cleaner cosmological standard ruler. Physical Review Letters, 2017, 121 (2), ⟨10.1103/PhysRevLett.121.021302⟩. ⟨hal-02462174⟩
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