https://doi.org/10.1140/epjp/i2019-12979-0
Regular Article
Greybody factor for a rotating Bardeen black hole
Department of Mathematics, University of the Punjab, Quaid-e-Azam Campus, 54590, Lahore, Pakistan
* e-mail: msharif.math@pu.edu.pk
Received:
16
May
2019
Accepted:
2
September
2019
Published online:
9
December
2019
In this paper, we formulate an analytical expression of the greybody factor in the context of a rotating Bardeen black hole which is valid in the low energy and low angular momentum region. Primarily, we analyze the profile of the effective potential which originates the absorption probability. We then derive two asymptotic solutions by solving the radial part of the Klein-Gordon equation in two different regions, namely, black hole and far-field horizons. We match these solutions smoothly to an intermediate regime to extend our results over the whole radial coordinate. In order to elaborate the significance of the analytical solution, we compute the energy emission rate and absorption cross-section for the massless scalar field. It is found that the rotation parameter increases the emission rate of scalar field particles while the orbital angular momentum minimizes the emission process.
© Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2019
