Tensões cosmológicas: status atual e perspectivas futuras

Autores

DOI:

https://doi.org/10.47456/Cad.Astro.v5nEspecial.44961

Palavras-chave:

Cosmologia, tensões cósmicas, energia escura

Resumo

Nos últimos anos tem sido reportada na literatura uma crescente discrepância (tensão) nos valores de importantes parâmetros cosmológicos quando inferidos através de diferentes observações. Além de ser um possível indicativo de problemas no Modelo Padrão da Cosmologia, ou na análise dos dados observacionais, a tensão coloca em questão a consistência de certos procedimentos tipicamente adotados na cosmologia. O problema da tensão na constante de Hubble H0 é considerado por muitos como um dos problemas mais pertinentes da cosmologia atual, e o mesmo está relacionado á um segundo problema, a tensão no parâmetro σ8, associado à amplitude das flutuações lineares da matéria. Aqui serão discutidas algumas das razões pelas quais este problema alcançou tamanha relevância, sendo responsável por grande parte dos esforços na cosmologia moderna. Será apresentado também um breve panorama dos principais cenários que têm sido consideradas na tentativa de abordar tais problemas do ponto de vista da cosmologia. Também serão discutidos os principais desafios e perspectivas futuras nesta direção.

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Biografia do Autor

Leila L. Graef, Universidade Federal Fluminense

A autora Leila L. Graef (leilagraef@id.uff.br) fez sua pós-graduação na Universidade de São Paulo e pós doutorado na McGill University, no Observatório Nacional e na Universidade do Estado do Rio de Janeiro. Atualmente é Professora Adjunta do Instituto de Física da Universidade Federal Fluminense (UFF), onde leciona, orienta estudantes de pós-graduação e desenvolve pesquisa. É membro do Cosmoverse e da colaboração NANOGrav. Tem experiência em Cosmologia e Gravitação, atuando principalmente nos seguintes temas: universo primordial, gravitação quântica, ondas gravitacionais estocásticas, energia escura e o problema das tensões cosmológicas.

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10-07-2024

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[1]
L. L. Graef, “Tensões cosmológicas: status atual e perspectivas futuras”, Cad. Astro., vol. 5, nº Especial, p. 87–97, jul. 2024.

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