Particles creation from JNW quantum perturbed black holes by minimally coupled Klein Gordon scalar free fields

TL;DR

This paper investigates particle creation from quantum scalar fields around JNW black holes, revealing a gray-body radiation spectrum influenced by backscattering effects, and explores the spatial origin of Hawking pairs.

Contribution

It introduces a detailed analysis of Hawking radiation from JNW black holes using Klein-Gordon fields, highlighting the gray-body spectrum and proposing methods to locate Hawking pair formation.

Findings

Hawking radiation from JNW black holes is a gray-body spectrum.

Backscattering causes deviations from ideal black body radiation.

Proposals for locating Hawking pair creation regions are discussed.

Abstract

In this work, we choose a minimal coupling interaction between massive Klein Gordon (KG) quantum scalar free fields and Janis-Newman-Winicour (JNW) spherically symmetric static black hole, to produce its Hawking temperature and luminosity. This is done by calculating asymptotic wave solutions at near and far from the black hole horizon. They are orthogonal mode solutions of local Hilbert spaces. By using these mode solutions, we calculated Bogolubov coefficients and then, we investigated number density matrix of created particles. Mathematical calculations show that this is not exactly similar to the Planck`s black body radiation energy density distribution but, it is "gray" body radiation distribution depended to the emitted Hawking particles frequency. Their difference is a non-vanishing absorptivity factor of backscattered particles after to form horizon of a collapsing body. Our motivation is determination of position of Hawking created pairs in which, two different proposals are proposed, so called as "fairwall" and "quantum atmosphere".