Momentum transfer in the dark sector and lensing convergence in upcoming galaxy surveys

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidad de Salamanca-
Autor(es): dc.creatorCardona, Wilmar-
Autor(es): dc.creatorFigueruelo, David-
Data de aceite: dc.date.accessioned2025-08-21T18:12:10Z-
Data de disponibilização: dc.date.available2025-08-21T18:12:10Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2022-11-30-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1088/1475-7516/2022/12/010-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/248033-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/248033-
Descrição: dc.descriptionWe investigated a cosmological model that allows a momentum transfer between dark matter and dark energy. The interaction in the dark sector mainly affects the behaviour of perturbations on small scales while the background evolution matches the wCDM solution. As a result of the momentum transfer, these kinds of models help alleviating the σ 8 discrepancy in the standard model, but do not resolve the so-called H 0 tension. We confirm that this is indeed the case by computing cosmological constraints. While our analysis tends to favour σ 8 values lower than in ΛCDM, we do not find evidence for a non-vanishing momentum transfer in the dark sector. Since upcoming galaxy surveys will deliver information on scales and red-shift relevant for testing models allowing momentum transfer in the dark sector, we also carried out forecasts using different survey configurations. We assessed the relevance of neglecting lensing convergence κ when modelling the angular power spectrum of number counts fluctuations C ℓij(z,z'). We found that not including κ in analyses leads to biased constraints (≈ 1-5σ) of cosmological parameters even when including information from other experiments. Incorrectly modelling C ℓij(z,z') might lead to spurious detection of neutrino masses and exacerbate discrepancies in H 0 and σ 8-
Descrição: dc.descriptionICTP South American Institute for Fundamental Research Instituto de Física Teórica Universidade Estadual Paulista-
Descrição: dc.descriptionDepartamento de Física Fundamental IUFFyM Universidad de Salamanca-
Descrição: dc.descriptionICTP South American Institute for Fundamental Research Instituto de Física Teórica Universidade Estadual Paulista-
Idioma: dc.languageen-
Relação: dc.relationJournal of Cosmology and Astroparticle Physics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectcosmological parameters from LSS-
Palavras-chave: dc.subjectdark energy theory-
Palavras-chave: dc.subjectdark matter theory-
Título: dc.titleMomentum transfer in the dark sector and lensing convergence in upcoming galaxy surveys-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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