Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-01-30
Astrophys.J.594:665-673,2003
Astronomy and Astrophysics
Astrophysics
Submitted to Astrophysical Journal, 11 pages, 8 figures
Scientific paper
10.1086/376983
We 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.
Blake Chris
Glazebrook Karl
No associations
LandOfFree
Probing dark energy using baryonic oscillations in the galaxy power spectrum as a cosmological ruler does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Probing dark energy using baryonic oscillations in the galaxy power spectrum as a cosmological ruler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Probing dark energy using baryonic oscillations in the galaxy power spectrum as a cosmological ruler will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-563594