Quasinormal modes, Hawking radiation and absorption of the massless scalar field for Bardeen black hole surrounded by perfect fluid dark matter
Qi Sun, Qian Li, Yu Zhang, Qi-Quan Li
Abstract
We study the quasinormal modes, Hawking radiation and absorption cross-section of the Bardeen black hole surrounded by perfect fluid dark matter for a massless scalar field. Our results show that the oscillation frequency of quasinormal modes is enhanced as magnetic charge [Formula: see text] or the dark matter parameter [Formula: see text] increases. For damping rate of quasinormal modes, the influence of them is different. Specifically, the increase of dark matter parameter [Formula: see text] makes the damping rate increasing at first and then decreasing. While the damping rate is continuously decreasing with the increase of the magnetic charge [Formula: see text]. Moreover, we find that the increase of the dark matter parameter [Formula: see text] enhances the power emission spectrum whereas magnetic charge [Formula: see text] suppresses it. This means that the lifespan of black holes increases for smaller value of [Formula: see text] and larger value of [Formula: see text] when other parameters are fixed. Finally, the absorption cross-section of the considered black hole is calculated with the help of the partial wave approach. Our results suggest that the absorption cross-section decreases with the dark matter parameter [Formula: see text] or the magnetic charge [Formula: see text] increasing.