1. Identificação | |
Tipo de Referência | Artigo em Revista Científica (Journal Article) |
Site | mtc-m21b.sid.inpe.br |
Código do Detentor | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
Identificador | 8JMKD3MGP5W34M/3G2T94P |
Repositório | sid.inpe.br/mtc-m21b/2014/03.28.20.14 |
Última Atualização | 2014:03.28.20.14.21 (UTC) administrator |
Repositório de Metadados | sid.inpe.br/mtc-m21b/2014/03.28.20.14.21 |
Última Atualização dos Metadados | 2021:03.05.19.01.36 (UTC) administrator |
DOI | 10.1088/1475-7516/2014/01/018 |
ISSN | 1475-7516 |
Rótulo | self-archiving-INPE-MCTI-GOV-BR |
Chave de Citação | NovaesBernFerrWuen:2014:SePrNo |
Título | Searching for primordial non-Gaussianity in Planck CMB maps using a combined estimator |
Ano | 2014 |
Data de Acesso | 18 abr. 2024 |
Tipo de Trabalho | journal article |
Tipo Secundário | PRE PI |
Número de Arquivos | 1 |
Tamanho | 1400 KiB |
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2. Contextualização | |
Autor | 1 Novaes, Camila Paiva 2 Bernuí, Armando 3 Ferreira, Ivan Soares 4 Wuensche, Carlos Alexandre |
Grupo | 1 AST-CEA-SPG-INPE-MCTI-GOV-BR 2 3 4 GB-GB-INPE-MCTI-GOV-BR |
Afiliação | 1 Instituto Nacional de Pesquisas Espaciais (INPE) 2 Observatório Nacional 3 Universidade de Brasília 4 Instituto Nacional de Pesquisas Espaciais (INPE) |
Endereço de e-Mail do Autor | 1 camilapnovaes@gmail.com 2 bernui@on.br 3 ivan@fis.unb.br 4 ca.wuensche@inpe.br |
Endereço de e-Mail | camila@das.inpe.br |
Revista | Journal of Cosmology and Astroparticle Physics |
Volume | 2014 |
Número | 1 |
Páginas | 18 |
Nota Secundária | A1_ASTRONOMIA_/_FÍSICA A1_MATEMÁTICA_/_PROBABILIDADE_E A1_ENGENHARIAS_III B1_GEOCIÊNCIAS |
Histórico (UTC) | 2014-03-28 20:14:21 :: camila@das.inpe.br -> administrator :: 2021-03-05 19:01:36 :: administrator -> marcelo.pazos@inpe.br :: 2014 |
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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 | finaldraft |
Palavras-Chave | primordial non-Gaussianity Planck CMB maps cosmic microwave background radiation |
Resumo | he extensive search for deviations from Gaussianity in cosmic microwave background radiation (CMB) data is very important due to the information about the very early moments of the universe encoded there. Recent analyses from Planck CMB data do not exclude the presence of non-Gaussianity of small amplitude, although they are consistent with the Gaussian hypothesis. The use of different techniques is essential to provide information about types and amplitudes of non-Gaussianities in the CMB data. In particular, we find interesting to construct an estimator based upon the combination of two powerful statistical tools that appears to be sensitive enough to detect tiny deviations from Gaussianity in CMB maps. This estimator combines the Minkowski functionals with a Neural Network, maximizing a tool widely used to study non-Gaussian signals with a reinforcement of another tool designed to identify patterns in a data set. We test our estimator by analyzing simulated CMB maps contaminated with different amounts of local primordial non-Gaussianity quantified by the dimensionless parameter f NL. We apply it to these sets of CMB maps and find < 98% of chance of positive detection, even for small intensity local non-Gaussianity like f NL = 38±18, the current limit from Planck data for large angular scales. Additionally, we test the suitability to distinguish between primary and secondary non-Gaussianities: first we train the Neural Network with two sets, one of nearly Gaussian CMB maps (|f NL| 10) but contaminated with realistic inhomogeneous Planck noise (i.e., secondary non-Gaussianity) and the other of non-Gaussian CMB maps, that is, maps endowed with weak primordial non-Gaussianity (28 f NL 48); after that we test an ensemble composed of CMB maps either with one of these non-Gaussian contaminations, and find out that our method successfully classifies < 95% of the tested maps as being CMB maps containing primordial or secondary non-Gaussianity. Furthermore, we analyze the foreground-cleaned Planck maps obtaining constraints for non-Gaussianity at large-angles that are in good agreement with recent constraints. Finally, we also test the robustness of our estimator including cut-sky masks and realistic noise maps measured by Planck, obtaining successful results as well. |
Área | CEA |
Arranjo 1 | urlib.net > BDMCI > Fonds > Produção pgr ATUAIS > AST > Searching for primordial... |
Arranjo 2 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > GBDIR > Searching for primordial... |
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/8JMKD3MGP5W34M/3G2T94P |
URL dos dados zipados | http://urlib.net/zip/8JMKD3MGP5W34M/3G2T94P |
Idioma | en |
Arquivo Alvo | MF+NN_jcap.pdf |
Grupo de Usuários | administrator camila@das.inpe.br marcelo.pazos@inpe.br |
Grupo de Leitores | administrator marcelo.pazos@inpe.br |
Visibilidade | shown |
Política de Arquivamento | denypublisher denyfinaldraft12 |
Permissão de Leitura | allow from all |
Permissão de Atualização | não transferida |
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5. Fontes relacionadas | |
Vinculação | 8JMKD3MGP7W/3963MJE |
Repositório Espelho | iconet.com.br/banon/2006/11.26.21.31 |
Unidades Imediatamente Superiores | 8JMKD3MGPCW/3F2NE4L 8JMKD3MGPCW/449S7R5 |
Lista de Itens Citando | sid.inpe.br/bibdigital/2021/03.05.18.59 1 |
Divulgação | WEBSCI; PORTALCAPES; SCOPUS. |
Acervo Hospedeiro | sid.inpe.br/mtc-m21b/2013/09.26.14.25.20 |
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6. Notas | |
Campos Vazios | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel format isbn lineage mark month nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project resumeid rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject tertiarytype url |
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7. Controle da descrição | |
e-Mail (login) | marcelo.pazos@inpe.br |
atualizar | |
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