Thermal behavior of a radially deformed black hole spacetime

In the present article, we study the Hawking effect and the bounds on greybody factor in a spacetime with radial deformation. This deformation is expected to carry the imprint of a non-Einsteinian theory of gravity, but shares some of the important characteristics of general relativity (GR). In particular, this radial deformation will restore the asymptotic behavior, and also allows for the separation of the scalar field equation in terms of the angular and radial coordinates - making it suitable to study the Hawking effect and greybody factors. However, the radial deformation would introduce a change in the locations of the horizon, and therefore, the temperature of the Hawking effect naturally alters. In fact, we observe that the deformation parameter has an enhancing effect on both temperature and bounds on the greybody factor, which introduces a useful distinction with the Kerr spacetime. We discuss these effects elaborately, and broadly study the thermal behavior of a radially deformed spacetime.

Automated summary

This article examines the Hawking effect and bounds on greybody factor in a spacetime with radial deformation, showing that the deformation parameter enhances both temperature and bounds. The radial deformation introduces changes in the location of the horizon, affecting the thermal behavior and creating a useful distinction with Kerr spacetime. Moreover, the separation of scalar field equation in terms of angular and radial coordinates facilitates the study of the Hawking effect and greybody factors.