Is the baryon acoustic oscillation peak a cosmological standard ruler?
Author
dc.contributor.author
Roukema, Boudewijn F.
Author
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Buchert, Thomas
Author
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Fujii, Hirokazu
Author
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Ostrowski, Jan J.
Admission date
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2016-05-18T16:53:38Z
Available date
dc.date.available
2016-05-18T16:53:38Z
Publication date
dc.date.issued
2016
Cita de ítem
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MNRAS 456, L45–L48 (2016)
en_US
Identifier
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DOI: 10.1093/mnrasl/slv159
Identifier
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https://repositorio.uchile.cl/handle/2250/138362
General note
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Artículo de publicación ISI
en_US
Abstract
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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.