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Cited by 183

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The detectability of baryonic acoustic oscillations in future galaxy surveys: BAO detectability in future galaxy surveys

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Angulo, R. E., Baugh, C. M., Frenk, C. S., Lacey, C. G.·2007·Monthly Notices of the Royal Astronomical Society

Abstract

We assess the detectability of baryonic acoustic oscillation (BAO) in the power spectrum of galaxies using ultralarge volume N-body simulations of the hierarchical clustering of dark matter and semi-analytical modelling of galaxy formation. A step-by-step illustration is given of the various effects (non-linear fluctuation growth, peculiar motions, non-linear and scale-dependent bias) which systematically change the form of the galaxy power spectrum on large scales from the simple prediction of linear perturbation theory. Using a new method to extract the scale of the oscillations, we nevertheless find that the BAO approach gives an unbiased estimate of the sound horizon scale. Sampling variance remains the dominant source of error despite the huge volume of our simulation box (=2.41 h−3Gpc3). We use our results to forecast the accuracy with which forthcoming surveys will be able to measure the sound horizon scale, s, and, hence constrain the dark energy equation of state parameter, w (with simplifying assumptions and without marginalizing over the other cosmological parameters). Pan-STARRS could potentially yield a measurement with an accuracy of Δs/s= 0.5–0.7 per cent (corresponding to Δw≈ 2–3 per cent), which is competitive with the proposed WFMOS survey (Δs/s= 1 per cent Δw≈ 4 per cent). Achieving Δw≤ 1 per cent using BAO alone is beyond any currently commissioned project and will require an all-sky spectroscopic survey, such as would be undertaken by the SPACE mission concept under proposal to ESA.

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Metadata

Authors
Angulo, R. E., Baugh, C. M., Frenk, C. S., & Lacey, C. G.
Venue
Monthly Notices of the Royal Astronomical Society
Published
2007-12-07
Volume
383
Issue
2
Pages
755-776
ISSN
0035-8711 (ISSN-L)
OpenAlex
W2145230250
Cited by
183
References
9
FWCI
11.88
Type
journal article
Language
en
Open access
bronze

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Angulo, R. E., Baugh, C. M., Frenk, C. S., & Lacey, C. G. (2007). The detectability of baryonic acoustic oscillations in future galaxy surveys: BAO detectability in future galaxy surveys. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1111/j.1365-2966.2007.12587.x

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