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Baryon acoustic oscillations and dynamical dark energy

Michael Doran, Steffen Stern and Eduard Thommes

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We compute the impact of dark energy at last scattering on measurements of baryon acoustic oscillations (BAOs). We show that an early dark energy component can contribute a systematic uncertainty to BAO measurements of up to 2.5%. Whilst this effect turns out to only slightly affect current BAO surveys, the results of future BAO surveys might become biased. We find that BAO surveys alone appear unable to resolve this systematic uncertainty, so supplementary measurements are necessary.


Keywords

surveys of galaxies

power spectrum

dark energy theory

 

E-print Number: astro-ph/0609075

Cited: by |

Refers: to

PACS

95.36.+x Dark energy

98.70.Vc Background radiations

98.80.Cq Particle-theory and field-theory models of the early Universe (including cosmic pancakes, cosmic strings, chaotic phenomena, inflationary universe, etc.)

Subjects

Gravitation and cosmology

Particle physics and field theory

Astrophysics and astroparticles

Dates

Issue 04 (April 2007)

Received 7 September 2006, accepted for publication 20 March 2007

Published 20 April 2007



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