Cosmological parameters from a million photometric redshifts of SDSS LRGs

Blake, C
Collister, A A
Bridle, S
Lahav, O

Publication date

May 2006

Abstract

We analyze MegaZ-LRG, a new photometric-redshift catalogue of Luminous Red Galaxies (LRGs) based on the imaging data of the Sloan Digital Sky Survey (SDSS) 4th Data Release. MegaZ-LRG, presented in a companion paper, contains > 10^6 photometric redshifts derived with ANNz, an Artificial Neural Network method, constrained by a spectroscopic sub-sample of ~13,000 galaxies obtained by the 2dF-SDSS LRG and Quasar (2SLAQ) survey. The catalogue spans the redshift range 0.4<z<0.7 with an r.m.s. redshift error ~ 0.03(1+z). We present the first cosmological parameter fits to galaxy angular power spectra from a photometric redshift survey. Combining the redshift slices with appropriate covariances, we determine the matter density Omega_m and baryon d...

Extracted data

We use cookies to provide a better user experience.

Data Protection

Cosmological parameters from a million photometric redshifts of SDSS LRGs

Blake, C
Collister, A A
Bridle, S
Lahav, O

Open link

Publication date

May 2006

Cosmological parameters from a million photometric redshifts of SDSS LRGs

Abstract

Extracted data

Cosmological parameters from a million photometric redshifts of SDSS LRGs

Abstract

Extracted data

Related items

Related items