Cosmology with Photometric Baryon Oscillation Experiments

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Cosmology with Photometric Baryon Oscillation
Experiments
and Weak Lensing

• Hu ZhanUC Davis

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BAO as a Standard Ruler
Angular diameter distance Hubble parameter
RS150 Mpc
(Sound horizon at recombination)
RS c Dz/H Dq D
(Angular radial scales)
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• 8.4-meter primary
• 10 deg2 FOV
• 3 billion pixels
• 0.3 - 1 µm

• 23,000 deg2 survey area
• r 26.5 mag
• Billions of galaxies up to z 3

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Angular Galaxy Power Spectra
Power spectra
Sensitivity to photo-z bias
Zhan, in prep
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Systematics
sz 0.05(1z), 50 galaxies/arcmin-2, EP
s(wp)s(wa), Nsys additive systematic noise
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Complementarity
Galaxy clustering bias
Photo-z bias
Photo-z rms
Spectroscopic calibrations must be carried out to
map the photo-z error distribution!
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LSST BO WL
sP(sz) sz/20 , Nsys 10-8
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Curvature?
Knox, Song, Zhan (2006), submitted
BO WL not affected by WK
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Photo-z rms and Power Spectrum Normalization
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Dark Energy Models
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DA G