Mitigating baryonic effects with a theoretical error covariance

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorLab Interinst E Astron LIneA-
Autor(es): dc.contributorUniv Arizona-
Autor(es): dc.contributorICTP South Amer Inst Fundamental Res-
Autor(es): dc.contributorCERN-
Autor(es): dc.creatorMoreira, Maria G. [UNESP]-
Autor(es): dc.creatorAndrade-Oliveira, Felipe [UNESP]-
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 [UNESP]-
Autor(es): dc.creatorSimonovic, Marko-
Data de aceite: dc.date.accessioned2022-08-04T21:58:51Z-
Data de disponibilização: dc.date.available2022-08-04T21:58:51Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
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/11449/218673-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/218673-
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 percent 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 Lambda CDM 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 Omega(m) and sigma(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.descriptionLaboratorio Interinstitucional de e-Astronomia (LIneA)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionNASA ROSES ATP-
Descrição: dc.descriptionDepartment of Energy-
Descrição: dc.descriptionDavid & Lucile Packard Foundation-
Descrição: dc.descriptionUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, Brazil-
Descrição: dc.descriptionLab Interinst E Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro, RJ, Brazil-
Descrição: dc.descriptionUniv Arizona, Steward Observ, Dept Astron, 933 North Cherry Ave, Tucson, AZ 85721 USA-
Descrição: dc.descriptionUniv Arizona, Dept Phys, 1118 E Fourth St, Tucson, AZ 85721 USA-
Descrição: dc.descriptionICTP South Amer Inst Fundamental Res, BR-01140070 Sao Paulo, SP, Brazil-
Descrição: dc.descriptionCERN, Theoret Phys Dept, 1 Esplanade Particules, CH-1211 Geneva 23, Switzerland-
Descrição: dc.descriptionUniv Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP, Brazil-
Descrição: dc.descriptionCNPq: 465376/2014-2-
Descrição: dc.descriptionFAPESP: 2016/01343-7-
Descrição: dc.descriptionNASA ROSES ATP: 16ATP16-0084-
Descrição: dc.descriptionDepartment of Energy: DE-SC0020247-
Formato: dc.format5592-5601-
Idioma: dc.languageen-
Publicador: dc.publisherOxford Univ Press-
Relação: dc.relationMonthly Notices Of The Royal Astronomical Society-
???dc.source???: dc.sourceWeb of Science-
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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