2011/05/31 by Camille Bonvin, Ruth Durrer · 21 citations
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Computer science #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Galaxy #Measure (data warehouse) #Metric (unit) #Physics #Redshift #Redshift survey #Sky #astro-ph.CO
paper · pdf · doi:10.1103/physrevd.84.063505
published as Phys.Rev.D84:063505,2011 · 16 pages, 11 figures; v2: 1 table and 4 figures added showing the ratio between the new contributions and the total angular power spectrum. Accepted for publication in PRD. v3: sign typo corrected in eq. (31)
openalex publication_date 2011/09/02 · arxiv created 2012/07/04 · arxiv updated 2015/05/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper we compute the quantity which is truly measured in a large galaxy survey. We take into account the effects coming from the fact that we actually observe galaxy redshifts and sky positions and not true spatial positions. Our calculations are done within linear perturbation theory for both the metric and the source velocities but they can be used for nonlinear matter power spectra. We shall see that the complications due to the fact that we only observe on our background light cone, and that we do not truly know the distance of the observed galaxy but only its redshift, not only cause an additional difficulty, but provide even more a new opportunity for future galaxy surveys.