Back Reaction from Trace Anomaly in RN-blackholes Evaporation
نویسنده
چکیده
A model is proposed to describe a transition from a charged black hole of mass M and charge Q to one of mass M and charge Q. The basic equations are derived from the non-vacuum Einstein field equations sourced by the Coulomb field and by a null scalar field with a nonvanishing trace anomaly. It is shown that the nonvanishing trace of the energy-momentum tensor prevents the formation of a naked singularity.
منابع مشابه
Gravitational collapse and evolution of holographic black holes
Gravitational collapse is analyzed in the Brane-World by arguing that regularity of five-dimensional geodesics require that stars on the brane have an atmosphere. For the simple case of a spherically symmetric cloud of non-dissipating dust, conditions are found for which the collapsing star evaporates and approaches the Hawking behavior as the (apparent) horizon is being formed. The effective e...
متن کاملJ un 1 99 7 Trace anomaly of dilaton coupled scalars in two dimensions
Conformal scalar fields coupled to the dilaton appear naturally in two-dimensional models of black hole evaporation. We show that their trace anomaly is (1/24π)[R − 6(∇φ)2 − 22φ]. It follows that an RST-type counterterm appears naturally in the one-loop effective action. [email protected] [email protected]
متن کاملTrace Anomaly of Dilaton Coupled Scalars in Two Dimensions
Conformal scalar fields coupled to the dilaton appear naturally in two-dimensional models of black hole evaporation. We show that their trace anomaly is (1/24π)[R− 6(∇φ)2 − 22φ]. It follows that the RST counterterm appears naturally in the one-loop effective action. [email protected] [email protected]
متن کاملHawking Radiation and Evaporation of the Black Hole Induced by a Klein-Gordon Soliton
A two-dimensional dilatonic black hole induced by a topological soliton is exactly solvable in the scalar field theory coupled to dilaton gravity. The Hawking radiation of the black hole is studied in the one-loop approximation with the help of the trace anomaly of energy-momentum tensors which is a geometrical invariant. The quantum theory can be also soluble in the RST scheme in order to cons...
متن کاملBaryogenesis from Primordial Blackholes after Electroweak Phase Transition
Incorporating a realistic model for accretion of ultra-relativistic particles by primordial blackholes (PBHs), we study the evolution of an Einstein-de Sitter universe consisting of PBHs embedded in a thermal bath from the epoch ∼ 10−33 sec to ∼ 5 × 10−9 sec. In this paper we use Barrow et al’s ansatz to model blackhole evaporation in which the modified Hawking temperature goes to zero in the l...
متن کامل