Absorção e espalhamento de um buraco negro com um monopolo global na gravidade f (R).

Abstract

We present the results of the calculation of the diferentials cattering cross section and absorption cross section for the black hole with a global monopolein ƒ(R) gravity. We apply the partial wave approach and show that in low-frequency limitand at small angles, the contribution to the dominant terminthes cattering / absorption cross section is modi ed by the presence of the global monopole and the gravity modi cation. In such limit, the absorption cross section shows to be proportional to the are a of the event horizon.