Year: 2006
Type: article
Abstract: We consider cosmological applications of galaxy number density correlations to be inferred from future deep and wide multiband optical surveys. We mostly focus on very large scales as a probe of possible features in the primordial power spectrum. We find the proposed survey of the Large Synoptic Survey Telescope may be competitive with future all-sky CMB experiments over a broad range of scales. On very large scales the inferred power spectrum is robust to photometric redshift errors and, given a sufficient number density of galaxies, to angular variations in dust extinction and photometric calibration errors. We also consider other applications, such as constraining dark energy with the two CMB-calibrated standard rulers in the matter power spectrum and controlling the effect of photometric redshift errors to facilitate the interpretation of cosmic shear data. We find that deep photometric surveys over a wide area can provide constraints that are competitive with spectroscopic surveys in small volumes.
Source: The Astrophysical Journal
DOI: 10.1086/500077
Authors: Hu Zhan, Lloyd Knox, J. Anthony Tyson, Vera Margoniner
Institution: University of California, Davis
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2089957430