Reissner-Nordstrom Black Holes and Strings with Rescaled Tension

TL;DR

This paper demonstrates that five-dimensional Reissner-Nordstrom black holes can be modeled by fundamental strings with rescaled tension in a five brane background, matching their entropy and Hawking radiation.

Contribution

It introduces a string description of five-dimensional Reissner-Nordstrom black holes with tension rescaling due to the five brane background, aligning black hole properties with string theory.

Findings

Black holes are described by fundamental strings with rescaled tension.

Black hole entropy matches the string entropy with tension rescaling.

Scalar emission from the string matches Hawking radiation predictions.

Abstract

We show that extreme and nonextreme Reissner--Nordstrom black holes in five dimensions can be described by closed fundamental strings with two charges in a magnetic five brane. Due to the five brane background the string oscillator number and tension are rescaled whereas the mass remains fixed. The black hole mass is given by the sum of the five brane and string masses. Its entropy however is given by only that of the string with the tension rescaling taken into account. We also show that the emission of a low energy scalar from the slightly nonextreme string matches the Hawking radiation expected from the black hole.