Interacting dark energy: The role of microscopic feedback in the dark sector

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

Avelino, PP (Autor) FCUP

Revista

Título: Physical Review D - Particles, Fields, Gravitation and Cosmology

Vol. 91 Nº 6

ISSN: 1550-7998

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 4 Citações

Outras Informações

ID Authenticus: P-00A-CCW

DOI: 10.1103/physrevd.91.083515

Abstract (EN): We investigate the impact on the classical dynamics of dark matter particles and dark energy of a nonminimal coupling in the dark sector, assuming that the mass of the dark matter particles is coupled to dark energy scalar field. We show that standard results can be recovered only if the space-time variation of the dark energy scalar field is sufficiently smooth on the characteristic length scale of the dark matter particles, and we determine the associated constraint dependent on both the mass and radius of the dark matter particles and the coupling to the dark energy scalar field. We further show, using field theory numerical simulations, that a violation of such constraint results in a microscopic feedback effect strongly affecting the dynamics of dark matter particles, with a potential impact on structure formation and on the space-time evolution of the dark energy equation of state.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6