Cosmology with Photometric Baryon Acoustic Oscillation Measurements

Details Cosmology with Photometric Baryon Acoustic Oscillation Measurements Cosmology with Photometric Baryon Acoustic Oscillation Measurements

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.8609z&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #86.09; Bulletin of the American Astronomical Society, V

Astronomy and Astrophysics

Astronomy

1

Scientific paper

LSST will obtain photometric redshifts for more than 3 billion galaxies with the distribution peaking around z = 1 and approximately 10% of the galaxies at z > 2.5. It will achieve sub-percent level precision on the angular diameter distance to 7 redshift bins from z = 0.2 to 3 with a CMB-calibrated standard ruler baryon acoustic oscillations (BAO) in the galaxy/matter power spectrum. By themselves, LSST BAO will provide weaker constraints on the dark energy equation of state parameters, w0 and wa, than LSST weak lensing (WL). However, because one can calibrate the error distribution of photometric redshifts with galaxy power spectra and determine the galaxy bias with galaxy and WL shear power spectra, a joint analysis of LSST BAO and WL will reduce the error ellipse area in the w0-a plane to one sixth of that by LSST WL alone.

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