Oliveira, Carlos Eduardo Pellicer deZhang, Shao-JunZhu, ZhiyingWang, BinAbdalla, Elcio2021-12-072021-12-072014-08-15OLIVEIRA, Carlos Eduardo Pellicer de; ZHU, Zhiying; ZHANG, Shao-Jun; WANG, Bin; ABDALLA, Elcio. Stability of Reissner-Nordström black hole in de Sitter background under charged scalar perturbation. Physical Review. D. Particles, Fields, Gravitation, and Cosmology, v. 90, p. 044042/1-044042/9, n. 2014. Disponível em: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.90.044042. Acesso em: 12 abr. 2018. DOI: http://dx.doi.org/10.1103/PhysRevD.90.0440422470-0029https://repositorio.ufrn.br/handle/123456789/45219We find a newinstability in the four-dimensional Reissner-Nordström–de Sitter black holes against charged scalar perturbations with vanishing angular momentum, l ¼ 0. We show that such an instability is caused by superradiance. The instability does not occur for a larger angular index, as explicitly proved for l ¼ 1. Our results are obtained from a numerical investigation of the time-domain profiles of the perturbationsAcesso AbertoReissner-NordströmBlack HoleCharged Scalar Perturbationarticle10.1103/PhysRevD.90.044042