TY - UNPB

T1 - Deconstructing Baryon Acoustic Oscillations: A Comparison of Methods

AU - Rassat, Anais

AU - Amara, Adam

AU - Amendola, Luca

AU - Castander, Francisco J.

AU - Kitching, Thomas

AU - Kunz, Martin

AU - Refregier, Alexandre

AU - Wang, Yun

AU - Weller, Jochen

PY - 2008/10/1

Y1 - 2008/10/1

N2 - The Baryon Acoustic Oscillations (BAOs) or baryon wiggles which are
present in the galaxy power spectrum at scales 100-150Mpc/h are powerful
features with which to constrain cosmology. The potential of these
probes is such that these are now included as primary science goals in
the planning of several future galaxy surveys. However, there is not a
uniquely defined BAO Method in the literature but a range of
implementations. We study the assumptions and cosmological performances
of three different BAO methods: the full Fourier space power spectrum
[P(k)], the `wiggles only' in Fourier space and the spherical harmonics
power spectrum [C(l)]. We contrast the power of each method to constrain
cosmology for two fiducial surveys taken from the Dark Energy Task Force
(DETF) report and equivalent to future ground and space based
spectroscopic surveys. We find that, depending on the assumptions used,
the dark energy Figure of Merit (FoM) can change by up to a factor of 35
for a given fiducial model and survey. We compare our results with the
DETF implementation and, discuss the robustness of each probe, by
quantifying the dependence of the FoM with the wavenumber range. The
more information used by a method, the higher its statistical
performance, but the higher its sensitivity to systematics and
implementations details.

AB - The Baryon Acoustic Oscillations (BAOs) or baryon wiggles which are
present in the galaxy power spectrum at scales 100-150Mpc/h are powerful
features with which to constrain cosmology. The potential of these
probes is such that these are now included as primary science goals in
the planning of several future galaxy surveys. However, there is not a
uniquely defined BAO Method in the literature but a range of
implementations. We study the assumptions and cosmological performances
of three different BAO methods: the full Fourier space power spectrum
[P(k)], the `wiggles only' in Fourier space and the spherical harmonics
power spectrum [C(l)]. We contrast the power of each method to constrain
cosmology for two fiducial surveys taken from the Dark Energy Task Force
(DETF) report and equivalent to future ground and space based
spectroscopic surveys. We find that, depending on the assumptions used,
the dark energy Figure of Merit (FoM) can change by up to a factor of 35
for a given fiducial model and survey. We compare our results with the
DETF implementation and, discuss the robustness of each probe, by
quantifying the dependence of the FoM with the wavenumber range. The
more information used by a method, the higher its statistical
performance, but the higher its sensitivity to systematics and
implementations details.

M3 - Working paper

VL - 0810

SP - 3

BT - Deconstructing Baryon Acoustic Oscillations: A Comparison of Methods

PB - ArXiv

ER -