Scalar field black holes

Abstract

Abstract With a suitable decomposition of its energy-momentum tensor into pressureless matter and a vacuum type term, we investigate the spherical gravitational collapse of a minimally coupled, self-interacting scalar field, showing that it collapses to a singularity. The formed blackhole has a mass $$M \sim 1/m$$ M∼1/m (in Planck units), where m is the mass of the scalar field. If the latter has the axion mass, $$m \sim 10^{-5}$$ m∼10-5 eV, the former has a mass $$M \sim 10^{-5} M_{\odot }$$ M∼10-5M⊙ .