Cloud of strings as source in 2+1-dimensional f(R) = Rn gravity

Abstract

We present three parameters exact solutions with possible black holes in 2+1-dimensional f(R) = R-n modified gravity coupled minimally to a cloud of strings. These three parameters are n, the coupling constant of the cloud of strings., and an integration constant C. Although in general one has to consider each set of parameters separately, for n an even integer greater than one we give a unified picture providing black holes. For n >= 1 we analyze a null/timelike geodesic within the context of particle confinement.