Probing dark energy using baryonic oscillations in the galaxy power spectrum as a cosmological ruler

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dc.creatorBlake, Chris
dc.creatorGlazebrook, Karl
dc.date2003-01-30
dc.date2003-05-16
dc.date.accessioned2026-07-07T10:47:34Z
dc.date.available2026-07-07T10:47:34Z
dc.descriptionWe show that the baryonic oscillations expected in the galaxy power spectrum may be used as a "standard cosmological ruler'' to facilitate accurate measurement of the cosmological equation of state. Our approach involves a straight-forward measurement of the oscillation "wavelength'' in Fourier space, which is fixed by fundamental linear physics in the early Universe and hence is highly model-independent. We quantify the ability of future large-scale galaxy redshift surveys with mean redshifts z~1 and z~3 to delineate the baryonic peaks in the power spectrum, and derive corresponding constraints on the parameter w describing the equation of state of the dark energy. For example, a survey of three times the Sloan volume at z ~ 1 can produce a measurement with accuracy dw ~ 0.1. We suggest that this method of measuring the dark energy powerfully complements other probes such as Type Ia supernovae, and suffers from a different (and arguably less serious) set of systematic uncertainties.
dc.descriptionSubmitted to Astrophysical Journal, 11 pages, 8 figures
dc.identifierhttps://arxiv.org/abs/astro-ph/0301632
dc.identifierhttp://arxiv.org/abs/astro-ph/0301632
dc.identifierAstrophys.J.594:665-673,2003
dc.identifierdoi:10.1086/376983
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/183578
dc.subjectAstrophysics
dc.titleProbing dark energy using baryonic oscillations in the galaxy power spectrum as a cosmological ruler
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