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Tipo de ReferênciaJournal Article
Sitemtc-m21b.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34P/3KTDLSS
Repositóriosid.inpe.br/mtc-m21b/2016/01.06.18.04
Última Atualização2016:01.06.18.05.13 administrator
Metadadossid.inpe.br/mtc-m21b/2016/01.06.18.04.21
Última Atualização dos Metadados2018:06.04.02.56.00 administrator
DOI10.1051/0004-6361/201526713
ISSN0004-6361
1432-0746
Chave de CitaçãoSantosCabeVillZhao:2015:InPlFo
TítuloInfluence of Planck foreground masks in the large angular scale quadrant CMB asymmetry
Ano2015
MêsDec.
Data de Acesso22 jan. 2021
Tipo de Trabalhojournal article
Número de Arquivos1
Tamanho745 KiB
Área de contextualização
Autor1 Santos, L.
2 Cabella, P.
3 Villela, Thyrso
4 Zhao, W.
Grupo1
2
3 DAS-CEA-INPE-MCTI-GOV-BR
Afiliação1 University of Sciences and Technology of China
2 Universita di Roma
3 Instituto Nacional de Pesquisas Espaciais (INPE)
4 Chinese Academy of Sciences
RevistaAstronomy and Astrophysics
Volume584
NúmeroA115
Tipo SecundárioPRE PI
Nota SecundáriaA1_GEOCIÊNCIAS A1_ENGENHARIAS_III A2_MATEMÁTICA_/_PROBABILIDADE_E_ESTATÍSTICA A2_INTERDISCIPLINAR A2_ENGENHARIAS_IV A2_ASTRONOMIA_/_FÍSICA B2_ENSINO C_ENGENHARIAS_II
Histórico2016-01-06 18:04:21 :: simone -> administrator ::
2018-06-04 02:56:00 :: administrator -> simone :: 2015
Área de conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteudoExternal Contribution
Tipo de Versãopublisher
Palavras-ChaveCosmic background radiation, Cosmology: observations, Methods: data analysis, Methods: statistical.
ResumoThe measured cosmic microwave background (CMB) angular distribution shows high consistency with the ΛCDM model, which predicts cosmological isotropy as one of its fundamental characteristics. However, isotropy violations were reported in CMB temperature maps of the Wilkinson Microwave Anisotropy Probe (WMAP) and confirmed by Planck satellite data. Aims. Our purpose is to investigate the influence of different sky cuts (masks) employed in the analysis of CMB angular distribution, in particular in the excess of power in the southeastern quadrant (SEQ) and the lack of power in the northeastern quadrant (NEQ), found in both WMAP and Planck data. Methods. We compared the two-point correlation function (TPCF) computed for each quadrant of the CMB foreground-cleaned temperature maps to 1000 Monte Carlo (MC) simulations generated assuming the ΛCDM best-fit power spectrum using four different masks, from the least to the most severe one: mask-rulerminimal, UT78, U73, and U66. In addition to the quadrants and for a better understanding of these anomalies, we computed the TPCF using the mask-rulerminimal for circular regions in the map where the excess and lack of power are present. We also compared, for completeness, the effect of Galactic cuts (+/-10, 20, 25, and 30 degrees above/below the Galactic plane) in the TPCF calculations as compared to the MC simulations. Results. We found consistent results for three masks, namely mask-rulerminimal, U73, and U66. The results indicate that the excess of power in the SEQ tends to vanish as the portion of the sky covered by the mask increases and the lack of power in the NEQ remains virtually unchanged. A different result arises for the newly released UT78 Planck mask. When this mask is applied, the NEQ is no longer anomalous. On the other hand, the excess of power in the SEQ becomes the most significant one among the masks. Nevertheless, the asymmetry between the SEQ and NEQ is independent of the mask and it disagrees with the isotropic model with at least 95% C.L. Conclusions. We find that UT78 disagrees with the other analyzed masks, especially when considering the SEQ and the NEQ individual analysis. Most important, the use of UT78 washes out the anomaly in the NEQ. Furthermore, we find an excess of kurtosis, compared with simulations, in the NEQ for the regions not masked by UT78 but masked by the other masks, indicating that the previous result could be due to unremoved residual foregrounds by UT78.
AreaCEA
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URL dos dadoshttp://urlib.net/rep/8JMKD3MGP3W34P/3KTDLSS
URL dos dados zipadoshttp://urlib.net/zip/8JMKD3MGP3W34P/3KTDLSS
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Repositório Espelhosid.inpe.br/mtc-m21b/2013/09.26.14.25.22
Unidades Imediatamente Superiores8JMKD3MGPCW/3ETR8EH
DivulgaçãoWEBSCI; PORTALCAPES; COMPENDEX; SCOPUS.
Acervo Hospedeirosid.inpe.br/mtc-m21b/2013/09.26.14.25.20
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