Clarifying Forecasts of Dark Energy Constraints from Baryon Acoustic Oscillations

Details Clarifying Forecasts of Dark Energy Constraints from Baryon Acoustic Oscillations Clarifying Forecasts of Dark Energy Constraints from Baryon Acoustic Oscillations

2009-04-14

arxiv.org/abs/0904.2218v3

Mod.Phys.Lett.A25:3093-3113,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

10 pages, 10 color figures. Text revised for clarification. Results unchanged

Scientific paper

10.1142/S0217732310034316

The measurement of baryon acoustic oscillations (BAO) from a galaxy redshift survey provides one of the most promising methods for probing dark energy. In this paper, we clarify the assumptions that go into the forecasts of dark energy constraints from BAO. We show that assuming a constant nP_{0.2}/G^2(z) (where P_{0.2} is the real space galaxy power spectrum at k=0.2h/Mpc and redshift z) gives a good approximation of the observed galaxy number density expected from a realistic flux-limited galaxy redshift survey. We find that assuming nP_{0.2}/G^2(z)=10 gives very similar dark energy constraints to assuming nP_{0.2}=3, but the latter corresponds to a galaxy number density larger by ~70% at z=2. We show how the Figure-of-Merit (FoM) for constraining dark energy depends on the assumed galaxy number density, redshift accuracy, redshift range, survey area, and the systematic errors due to calibration and uncertainties in the theory of nonlinear evolution and galaxy biasing. We find that an additive systematic noise of up to 0.4-0.5% per dz=0.1 redshift slice does not lead to significant decrease in the BAO FoM.

Affiliated with

Also associated with

No associations

Rating

Clarifying Forecasts of Dark Energy Constraints from Baryon Acoustic Oscillations 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 Clarifying Forecasts of Dark Energy Constraints from Baryon Acoustic Oscillations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clarifying Forecasts of Dark Energy Constraints from Baryon Acoustic Oscillations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-591277