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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

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

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Autor(es):
Xavier, H. S. [1] ; Costa-Duarte, V, M. ; Balaguera-Antolinez, A. [2, 3] ; Bilicki, M. [4, 5]
Número total de Autores: 4
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
Número total de Afiliações: 5
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