2012/10/08 by J. Bel, Bel, J., C. Marinoni +1 · 1 citation
Neuroscience · Physics and Astronomy · #Circadian rhythm and melatonin #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #astro-ph.CO
paper · pdf · doi:10.48550/arxiv.1210.2365
11 pages, 8 figures, accepted for publication in A&A, references added
openalex publication_date 2012/10/08 · arxiv created 2013/12/12 · arxiv updated 2013/12/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We demonstrate that accurate and precise cosmological information can be extracted from the cell count analysis of the 3D spatial clustering of galaxies once the second-order ratio between one- and two-point moments of the smoothed galaxy density distribution is analyzed. This probe does not require the calibration of any standard rod, the knowledge of the galaxy bias nor the modeling of galaxy redshift distortions. Using the spectroscopic Sloan Digital Sky Survey (SDSS) data release 7 (DR7) galaxy sample, no cosmic microwave background (CMB) information, weak (flat) priors on the value of the curvature of the universe (Omegak) and the constant value of the dark energy equation of state (w), we estimate the abundance of matter (Omegam) with a relative error of 11% (at 68% c.l.). The method may be instrumental in searching for evidences of new physics beyond the standard model of cosmology and in planning future missions such as BigBOSS or EUCLID.