New Insights into Radiation and Singularity of Black Holes

Quantum Unruh effect with Mach's principle of equivalence indicates that an observer in a gravitational field detects a thermal radiation with temperature ptoportional to the gravitational acceleration or field. Recently, the author has obtained total Unruh radiation energy that surrounds a gravitational object and shown that an object emits Unruh radiation when it gains mass or shinks radius. For a black hole, it does not radiate Unruh radiation unless it reduces its mass. The Unruh radiation power of a black hole is determined by the rate of change of the total Unruh radiation energy. It gives a result only a tiny part of mass energy loss, completelty different from the Hawking radiation that is derived by substituting the temperature of Unruh radiation at the surface of a bklack hole into the Stephan-Boltzman law. As the Unruh radiation detected by an observer in a gravitational field is gravitational rather than generated from thermal motions of matter or particles, we believe that the Stepha-Boltzman law is not applicable and hence the Hawking radiation unphysical. In addition, quantum Unruh effect shows that matter inside a black hole may not form a size-less singularity, where density and tempetaure (hence the total Unruh radiation energy) go to infinity and spacetime breaks down with infinite curvature, because this violates the law of energy conservation. The radius of singularity sphere possibly formed is mass-dependent and cannot be zero unless it massless. This presentation gives an overview of studies.