All-sky angular power spectra from cleaned WISE x SuperCOSMOS galaxy number counts

Autor(es)

Xavier, H. S. ^[1] ; Costa-Duarte, V, M. ; Balaguera-Antolinez, A. ^{[2, 3]} ; Bilicki, M. ^{[4, 5]}

Afiliação do(s) autor(es)

^[1] V, Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, Cidade Univ, Sao Paulo, SP - Brazil

^[2] Univ La Laguna, Dept Astrofis, E-38206 Tenerife - Spain

^[3] Inst Astrofis Canarias, E-38205 Tenerife - Spain

^[4] Leiden Univ, Leiden Observ, Niels Bohrweg 2, NL-2333 CA Leiden - Netherlands

^[5] Polish Acad Sci, Ctr Theoret Phys, Al Lotnikow 32-46, PL-02668 Warsaw - Poland

• Tipo de documento: Artigo Científico
• Fonte: Journal of Cosmology and Astroparticle Physics; n. 8 AUG 2019.
• Citações Web of Science: 1

Resumo

Aiming to extract cosmological information from linear scales of the WISE x SuperCOSMOS photometric redshift catalog, we perform a characterization of the systematic effects associated with stellar content, evidencing the presence of contamination and obscuration. We create an integrated model for these effects (which together we call ``usurper contamination{''}), devise a method to remove both of them simultaneously and show its functionality by applying it to a set of mock catalogs. When administered to WISE x SuperCOSMOS data, our method shows to improve the measurements of angular power spectra on scales l less than or similar to 15 and the extraction of cosmological parameters therefrom, even though a significant excess of power remains at these scales. When ignoring scales l < 15, we still find strong indications of systematics, albeit these can be localized in the southern equatorial hemisphere. An independent analysis of the northern hemisphere at l >= 15 agrees with the ACDM model with parameters from the Planck satellite and gives Omega(c) = 0.254 +/- 0.020 and Omega(b) < 0.065 at 95% confidence limit when combined with priors on H-0, A(s) and n(s). (AU)

• Processo FAPESP: 09/54006-4 - Um cluster de computadores para o Departamento de Astronomia do IAG-USP e para o Núcleo de Astrofísica da UNICSUL
• Beneficiário: Elisabete Maria de Gouveia Dal Pino
• Linha de fomento: Auxílio à Pesquisa - Programa Equipamentos Multiusuários