2013/11/30 by Alvise Raccanelli, Daniele Bertacca, Roy Maartens +2 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Cluster analysis #Correlation function (quantum field theory) #Cosmology #Galaxies: Formation, Evolution, Phenomena #Galaxy #Observer (physics) #Redshift #Relativistic quantum chemistry #Scientific Research and Discoveries #Strong gravitational lensing #Weak gravitational lensing #astro-ph.CO
paper · pdf · doi:10.1007/s10714-016-2076-8
published as Gen.Rel.Grav. 48 (2016) no.7, 84 · 13 pages, 11 figures; Minor changes. Version accepted by GRG
openalex publication_date 2016/06/02 · arxiv created 2016/06/07 · arxiv updated 2016/06/08 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Galaxy clustering on very large scales can be probed via the 2-point correlation function in the general case of wide and deep separations, including all the lightcone and relativistic effects. Using our recently developed formalism, we analyze the behavior of the local and integrated contributions and how these depend on redshift range, linear and angular separations and luminosity function. Relativistic corrections to the local part of the correlation can be non-negligible but they remain generally sub-dominant. On the other hand, the additional correlations arising from lensing convergence and time-delay effects can become very important and even dominate the observed total correlation function. We investigate different configurations formed by the observer and the pair of galaxies, and we find that the case of near-radial large-scale separations is where these effects will be the most important.