Consequence of Hawking radiation from 2d dilaton black holes

TL;DR

This paper numerically investigates the CGHS 2D dilaton black hole model, revealing that the mass function can become negative, indicating Hawking radiation surpasses the initial black hole mass, similar to the RST model.

Contribution

It provides a numerical analysis of the CGHS model's mass function behavior, highlighting the negative mass values due to Hawking radiation effects.

Findings

Mass function becomes negative during evolution.

Hawking radiation exceeds initial black hole mass.

Behavior similar to the RST model.

Abstract

We investigate the CGHS model through numerical calculation. The behavior of the mass function, which we introduced in our previous work as a ``local mass'', is examined. We found that the mass function takes negative values, which means that the amount of Hawking radiation becomes greater than the initial mass of the black hole as in the case of the RST model.