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 | 8JMKD3MGP3W34P/3KMH4GE |
Repositório | sid.inpe.br/mtc-m21b/2015/12.01.14.53 (acesso restrito) |
Última Atualização | 2015:12.01.14.54.32 (UTC) administrator |
Repositório de Metadados | sid.inpe.br/mtc-m21b/2015/12.01.14.53.30 |
Última Atualização dos Metadados | 2018:06.04.02.55.54 (UTC) administrator |
DOI | 10.1088/1475-7516/2015/09/045 |
ISSN | 1475-7516 |
Chave de Citação | VitentiPenn:2015:GeReRe |
Título | A general reconstruction of the recent expansion history of the universe |
Ano | 2015 |
Mês | Sept. |
Data de Acesso | 15 jun. 2024 |
Tipo de Trabalho | journal article |
Tipo Secundário | PRE PI |
Número de Arquivos | 1 |
Tamanho | 2960 KiB |
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2. Contextualização | |
Autor | 1 Vitenti, S. D. P. 2 Penna-Lima, Mariana |
Grupo | 1 2 DAS-CEA-INPE-MCTI-GOV-BR |
Afiliação | 1 Institut d'Astrophysique de Paris 2 Instituto Nacional de Pesquisas Espaciais (INPE) |
Endereço de e-Mail do Autor | 1 2 pennal@apc.in2p3.fr |
Revista | Journal of Cosmology and Astroparticle Physics |
Volume | 2015 |
Número | 9 |
Páginas | 045 |
Histórico (UTC) | 2015-12-01 14:53:30 :: simone -> administrator :: 2018-06-04 02:55:54 :: administrator -> simone :: 2015 |
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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 | publisher |
Palavras-Chave | baryon acoustic oscillations dark energy theory supernova type Ia-standard candles |
Resumo | Distance measurements are currently the most powerful tool to study the expansion history of the universe without specifying its matter content nor any theory of gravitation. Assuming only an isotropic, homogeneous and flat universe, in this work we introduce a model-independent method to reconstruct directly the deceleration function via a piecewise function. Including a penalty factor, we are able to vary continuously the complexity of the deceleration function from a linear case to an arbitrary (n+1)-knots spline interpolation. We carry out a Monte Carlo (MC) analysis to determine the best penalty factor, evaluating the bias-variance trade-off, given the uncertainties of the SDSS-II and SNLS supernova combined sample (JLA), compilations of baryon acoustic oscillation (BAO) and H(z) data. The bias-variance analysis is done for three fiducial models with different features in the deceleration curve. We perform the MC analysis generating mock catalogs and computing their best-fit. For each fiducial model, we test different reconstructions using, in each case, more than 104 catalogs in a total of about 5× 105. This investigation proved to be essential in determining the best reconstruction to study these data. We show that, evaluating a single fiducial model, the conclusions about the bias-variance ratio are misleading. We determine the reconstruction method in which the bias represents at most 10% of the total uncertainty. In all statistical analyses, we fit the coefficients of the deceleration function along with four nuisance parameters of the supernova astrophysical model. For the full sample, we also fit H0 and the sound horizon rs(zd) at the drag redshift. The bias-variance trade-off analysis shows that, apart from the deceleration function, all other estimators are unbiased. Finally, we apply the Ensemble Sampler Markov Chain Monte Carlo (ESMCMC) method to explore the posterior of the deceleration function up to redshift 1.3 (using only JLA) and 2.3 (JLA+BAO+H(z)). We obtain that the standard cosmological model agrees within 3σ level with the reconstructed results in the whole studied redshift intervals. Since our method is calibrated to minimize the bias, the error bars of the reconstructed functions are a good approximation for the total uncertainty. |
Área | CEA |
Arranjo | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDAS > A general reconstruction... |
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 | |
Idioma | en |
Arquivo Alvo | 2015_vitenti.pdf |
Grupo de Usuários | simone |
Grupo de Leitores | administrator simone |
Visibilidade | shown |
Política de Arquivamento | denypublisher denyfinaldraft12 |
Permissão de Leitura | deny from all and allow from 150.163 |
Permissão de Atualização | não transferida |
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5. Fontes relacionadas | |
Repositório Espelho | urlib.net/www/2011/03.29.20.55 |
Unidades Imediatamente Superiores | 8JMKD3MGPCW/3ETR8EH |
Lista de Itens Citando | sid.inpe.br/bibdigital/2013/10.01.00.07 3 |
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 e-mailaddress format isbn label lineage mark nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project resumeid rightsholder schedulinginformation secondarydate secondarykey secondarymark session shorttitle sponsor subject tertiarymark tertiarytype url |
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7. Controle da descrição | |
e-Mail (login) | simone |
atualizar | |
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