| 1. Identificação | ||||
| Tipo de Referência | Artigo em Revista Científica (Journal Article) | |||
| Site | mtc-m16d.sid.inpe.br | |||
| Código do Detentor | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S | |||
| Identificador | 8JMKD3MGP7W/3CDL5DE | |||
| Repositório | sid.inpe.br/mtc-m19/2012/08.07.13.50 | |||
| Última Atualização | 2012:10.08.19.39.43 (UTC) administrator | |||
| Repositório de Metadados | sid.inpe.br/mtc-m19/2012/08.07.13.50.54 | |||
| Última Atualização dos Metadados | 2018:06.05.04.12.37 (UTC) administrator | |||
| Chave Secundária | INPE--PRE/ | |||
| DOI | 10.1051/0004-6361/201118757 | |||
| ISSN | 0004-6361 1432-0746 | |||
| Chave de Citação | SantosVillWuen:2012:AsAnDi | |||
| Título | Asymmetries in the angular distribution of the cosmic microwave background  | |||
| Projeto | CNPq 3081132010-1, 3082022010-4 | |||
| Ano | 2012 | |||
| Data de Acesso | 27 jun. 2024 | |||
| Tipo Secundário | PRE PI | |||
| Número de Arquivos | 1 | |||
| Tamanho | 429 KiB | |||
| 2. Contextualização | ||||
| Autor | 1 Santos, L. 2 Villela, Thyrso 3 Wuensche, C. A. | |||
| Grupo | 1 2 DAS-CEA-INPE-MCTI-GOV-BR 3 DAS-CEA-INPE-MCTI-GOV-BR | |||
| Afiliação | 1 Universita di Roma “Tor Vergata”, Dipartimento di Fisica, Roma, Italy 2 Instituto Nacional de Pesquisas Espaciais (INPE) 3 Instituto Nacional de Pesquisas Espaciais (INPE) | |||
| Endereço de e-Mail do Autor | 1 larissa.santos@roma2.infn.it 2 villela@das.inpe.br 3 alex@das.inpe.br | |||
| Endereço de e-Mail | tereza@sid.inpe.br | |||
| Revista | Astronomy & Astrophysics | |||
| Volume | 544 | |||
| Número | Article numberA121 | |||
| Páginas | 1-8 | |||
| Nota Secundária | A2_ASTRONOMIA_/_FÍSICA A1_ENGENHARIAS_II B1_ENGENHARIAS_IV B5_ENSINO_DE_CIÊNCIAS_E_MATEMATICA A1_GEOCIÊNCIAS A2_MATEMÁTICA_/_PROBABILIDADE_E_ESTATÍSTICA | |||
| Histórico (UTC) | 2012-08-07 13:50:54 :: tereza@sid.inpe.br -> administrator :: 2012-08-07 13:50:55 :: administrator -> tereza@sid.inpe.br :: 2012 2012-08-07 13:54:52 :: tereza@sid.inpe.br -> banon :: 2012 2012-09-21 14:37:54 :: banon -> tereza@sid.inpe.br :: 2012 2012-10-08 19:39:43 :: tereza@sid.inpe.br -> administrator :: 2012 2012-10-08 20:56:17 :: administrator -> tereza@sid.inpe.br :: 2012 2012-12-05 11:58:51 :: tereza@sid.inpe.br -> administrator :: 2012 2018-06-05 04:12:37 :: administrator -> tereza@sid.inpe.br :: 2012 | |||
| 3. Conteúdo e estrutura | ||||
| É a matriz ou uma cópia? | é a matriz | |||
| Estágio do Conteúdo | concluido | |||
| Transferível | 1 | |||
| Tipo do Conteúdo | External Contribution | |||
| Tipo de Versão | publisher | |||
| Palavras-Chave | Angular correlations Cold spots Cosmic background radiation Cosmic microwave backgrounds Cosmology: observation Four quadrant Linear combinations Methods:data analysis Methods:statistical Model spectra Monte Carlo simulations North-south asymmetry Quadrupoles Two-point Wilkinson microwave anisotropy probe Cosmic Microwave Background observations data analysis statistical | |||
| Resumo | Context. Intriguing features in the angular distribution of the cosmic microwave background (CMB), such as the north-south asymmetry, were reported in the one- and three-year Wilkinson Microwave Anisotropy Probe (WMAP) data and should be studied in detail. We investigate some of these asymmetries in the CMB temperature angular distribution considering the CDM model in the three, five and seven year WMAP data. Aims. We aim to analyze the four quadrants of the internal linear combination (ILC) CMB maps using three dierent Galactic cuts: the WMAP KQ85 mask, a b 10 Galactic cut, and the WMAP KQ85 mask b 10 Galactic cut. Methods. We used the two-point angular correlation function (TPCF) in the WMAP maps for each of their quadrants. The same procedure was performed for 1000 Monte Carlo (MC) simulations that were produced using the WMAP team CDM best-fit power spectrum. In addition, we changed the quadrupole and octopole amplitudes obtained from the CDM model spectrum. We changed this to fit the quadrupole and octopole amplitudes to their observable values from the WMAP data. We repeated the analysis for the 1000 simulations of this modified CDM model, hereafter MCDM. Results. Our analysis showed asymmetries between the southeastern quadrant (SEQ) and the other quadrants (southwestern quadrant (SWQ), northeastern quadrant (NEQ) and northwestern quadrant (NWQ)). Over all WMAP ILC maps, the probability for the occurrence of the SEQ-NEQ, SEQ-SWQ and SEQ-NWQ asymmetries varies from 0.1% (SEQ-NEQ) to 8.5% (SEQ-SWQ) using the KQ85 mask and the KQ85 mask b 10 Galactic cut, respectively. We also calculated the probabilities for the MCDM using only the KQ85 mask and found no significant dierences in the results. Moreover, the cold spot region located in the SEQ quadrant was covered with masks of 5,10 and 15 degrees radius and again the results remained unchanged. Furthermore, this analysis was repeated for random regions in the SEQ quadrant with a 15-degree mask and the SEQ quadrant still remained asymmetric with respect to the other quadrants of the CMB map. Conclusions. We found an excess of power in the TPCF at scales 100 degrees in the SEQ with respect to the other quadrants that is independent of the Galactic cut used. Moreover, we tested a possible relation between the cold spot and the SEQ excess of power and found no evidence for it. Finally, we could not find any specific region within the SEQ that might be considered responsible for the quadrant asymmetry. | |||
| Área | CEA | |||
| Arranjo | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDAS > Asymmetries in the... | |||
| Conteúdo da Pasta doc | acessar | |||
| Conteúdo da Pasta source | não têm arquivos | |||
| Conteúdo da Pasta agreement |
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| 4. Condições de acesso e uso | ||||
| URL dos dados | http://urlib.net/ibi/8JMKD3MGP7W/3CDL5DE | |||
| URL dos dados zipados | http://urlib.net/zip/8JMKD3MGP7W/3CDL5DE | |||
| Idioma | en | |||
| Arquivo Alvo | Santos-AstronAstroph-aa18757-11[1].pdf | |||
| Grupo de Usuários | administrator banon tereza@sid.inpe.br | |||
| Grupo de Leitores | administrator tereza@sid.inpe.br | |||
| Visibilidade | shown | |||
| Política de Arquivamento | allowpublisher allowfinaldraft | |||
| Permissão de Leitura | allow from all | |||
| Permissão de Atualização | não transferida | |||
| 5. Fontes relacionadas | ||||
| Repositório Espelho | sid.inpe.br/mtc-m19@80/2009/08.21.17.02.53 | |||
| Unidades Imediatamente Superiores | 8JMKD3MGPCW/3ETR8EH | |||
| Divulgação | WEBSCI; PORTALCAPES. | |||
| Acervo Hospedeiro | sid.inpe.br/mtc-m19@80/2009/08.21.17.02 | |||
| 6. Notas | ||||
| Campos Vazios | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel format isbn label lineage mark month nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress resumeid rightsholder schedulinginformation secondarydate session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url | |||
| 7. Controle da descrição | ||||
| e-Mail (login) | tereza@sid.inpe.br | |||
| atualizar | ||||