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Article Dans Une Revue Monthly Notices of the Royal Astronomical Society Année : 2017

Rapid modelling of the redshift-space power spectrum multipoles for a masked density field

M.J. Wilson
  • Fonction : Auteur
J.A. Peacock
  • Fonction : Auteur
A.N. Taylor
  • Fonction : Auteur

Résumé

In this work, we reformulate the forward modelling of the redshift-space power spectrum multipole moments for a masked density field, as encountered in galaxy redshift surveys. Exploiting the symmetries of the redshift-space correlation function, we provide a masked-field generalization of the Hankel transform relation between the multipole moments in real and Fourier space. Using this result, we detail how a likelihood analysis requiring computation for a broad range of desired P(k) models may be executed 10^3–10^4 times faster than with other common approaches, together with significant gains in spectral resolution. We present a concrete application to the complex angular geometry of the VIMOS Public Extragalactic Redshift Survey PDR-1 release and discuss the validity of this technique for finite-angle surveys.

Dates et versions

hal-01554980 , version 1 (03-07-2017)

Identifiants

Citer

M.J. Wilson, J.A. Peacock, A.N. Taylor, S. de La Torre. Rapid modelling of the redshift-space power spectrum multipoles for a masked density field. Monthly Notices of the Royal Astronomical Society, 2017, 464 (3), pp.3121-3130. ⟨10.1093/mnras/stw2576⟩. ⟨hal-01554980⟩
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