Mitigating baryonic effects with a theoretical error covariance

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorLaboratório Interinstitucional de e-Astronomia - LIneA-
Autor(es): dc.contributorUniversity of Arizona-
Autor(es): dc.contributorICTP South American Institute for Fundamental Research-
Autor(es): dc.contributorCERN-
Autor(es): dc.creatorMoreira, Maria G.-
Autor(es): dc.creatorAndrade-Oliveira, Felipe-
Autor(es): dc.creatorFang, Xiao-
Autor(es): dc.creatorHuang, Hung-Jin-
Autor(es): dc.creatorKrause, Elisabeth-
Autor(es): dc.creatorMiranda, Vivian-
Autor(es): dc.creatorRosenfeld, Rogerio-
Autor(es): dc.creatorSimonović, Marko-
Data de aceite: dc.date.accessioned2025-08-21T18:56:46Z-
Data de disponibilização: dc.date.available2025-08-21T18:56:46Z-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2022-04-29-
Data de envio: dc.date.issued2021-10-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1093/mnras/stab2481-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/229699-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/229699-
Descrição: dc.descriptionOne of the primary sources of uncertainties in modelling the cosmic-shear power spectrum on small scales is the effect of baryonic physics. Accurate cosmology for stage-IV surveys requires knowledge of the matter power spectrum deep in the non-linear regime at the per cent level. Therefore, it is important to develop reliable mitigation techniques to take into account baryonic uncertainties if information from small scales is to be considered in the cosmological analysis. In this work, we develop a new mitigation method for dealing with baryonic physics for the case of the shear angular power spectrum. The method is based on an augmented covariance matrix that incorporates baryonic uncertainties informed by hydrodynamical simulations. We use the results from 13 hydrodynamical simulations and the residual errors arising from a fit to a ΛCDM model using the extended halo model code HMCODE to account for baryonic physics. These residual errors are used to model a so-called theoretical error covariance matrix that is added to the original covariance matrix. In order to assess the performance of the method, we use the 2D tomographic shear from four hydrodynamical simulations that have different extremes of baryonic parameters as mock data and run a likelihood analysis comparing the residual bias on Ωm and σ 8 of our method and the HMCODE for an LSST-like survey. We use different modelling of the theoretical error covariance matrix to test the robustness of the method. We show that it is possible to reduce the bias in the determination of the tested cosmological parameters at the price of a modest decrease in the precision.-
Descrição: dc.descriptionNational Aeronautics and Space Administration-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionInstituto Nacional de Ciência e Tecnologia de Medicina Molecular-
Descrição: dc.descriptionU.S. Department of Energy-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista-
Descrição: dc.descriptionLaboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. Jose Cristino 77-
Descrição: dc.descriptionDepartment of Astronomy Steward Observatory University of Arizona, 933 North Cherry Avenue-
Descrição: dc.descriptionDepartment of Physics University of Arizona, 1118 E. Fourth Street-
Descrição: dc.descriptionICTP South American Institute for Fundamental Research-
Descrição: dc.descriptionTheoretical Physics Department CERN, 1 Esplanade des Particules-
Descrição: dc.descriptionInstituto de Física Teórica Universidade Estadual Paulista-
Descrição: dc.descriptionNational Aeronautics and Space Administration: 16-ATP16-0084-
Descrição: dc.descriptionFAPESP: 2016/01343-7-
Descrição: dc.descriptionInstituto Nacional de Ciência e Tecnologia de Medicina Molecular: 465376/2014-2-
Descrição: dc.descriptionU.S. Department of Energy: DE-SC0020247-
Formato: dc.format5592-5601-
Idioma: dc.languageen-
Relação: dc.relationMonthly Notices of the Royal Astronomical Society-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCosmology: observations-
Palavras-chave: dc.subjectLarge-scale structure of Universe-
Título: dc.titleMitigating baryonic effects with a theoretical error covariance-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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