Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 456, Issue 1, Pages L45-L48Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnrasl/slv159
Keywords
cosmological parameters; cosmology: observations; dark energy; distance scale; large-scale structure of Universe
Categories
Funding
- Lyon Institute of Origins [ANR-10-LABX-66]
- CONICYT Anillo Project [ACT-1122]
- UMI-FCA (Laboratoire Franco-Chilien d'Astronomie) [UMI 3386]
- CNRS/INSU, France
- Universidad de Chile
- National Science Centre, Poland [2014/13/B/ST9/00845]
- Polish NCN [DEC-2013/08/M/ST9/00664]
- Poznan Supercomputing and Networking Center (PSNC) [197]
- Alfred P. Sloan Foundation
- National Science Foundation
- US Department of Energy
- National Aeronautics and Space Administration
- Japanese Monbukagakusho
- Max Planck Society
- Higher Education Funding Council for England
Ask authors/readers for more resources
In the standard model of cosmology, the Universe is static in comoving coordinates; expansion occurs homogeneously and is represented by a global scale factor. The baryon acoustic oscillation (BAO) peak location is a statistical tracer that represents, in the standard model, a fixed comoving-length standard ruler. Recent gravitational collapse should modify the metric, rendering the effective scale factor, and thus the BAO standard ruler, spatially inhomogeneous. Using the Sloan Digital Sky Survey, we show to high significance (P < 0.001) that the spatial compression of the BAO peak location increases as the spatial paths' overlap with superclusters increases. Detailed observational and theoretical calibration of this BAO peak location environment dependence will be needed when interpreting the next decade's cosmological surveys.
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