A energia escura e os desafios do modelo cosmológico padrão
DOI:
https://doi.org/10.47456/Cad.Astro.v7n1.52249Palavras-chave:
energia escura, modelo cosmológico padrão, energia escura dinâmica, tensões cosmológicasResumo
A evidência observacional de que o Universo se encontra em expansão acelerada representa um dos principais desafios da cosmologia moderna, sendo usualmente atribuída à presença de uma componente dominante conhecida como energia escura. O modelo cosmológico padrão, ΛCDM, fornece uma descrição consistente de uma ampla gama de observações, mas enfrenta importantes dificuldades tanto do ponto de vista teórico quanto observacional. Neste artigo, apresentamos uma revisão do modelo ΛCDM, discutindo sua fundamentação teórica e os principais testes observacionais que sustentam sua validade. Damos ênfase às tensões observacionais recentes, como aquelas associadas à constante de Hubble (H0) e à amplitude das flutuações de matéria (S8), além de resultados recentes do levantamento DESI que sugerem possíveis desvios em relação ao modelo padrão. Discutimos ainda as implicações dessas tensões e possíveis extensões do modelo, destacando o papel de cenários com energia escura dinâmica. Este panorama busca fornecer uma visão atualizada dos desafios enfrentados pela cosmologia contemporânea e das perspectivas para a compreensão da aceleração cósmica.
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Copyright (c) 2026 Rodrigo Von Marttens, Jailson Alcaniz, Saulo Carneiro

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