Solução de corda negra da gravidade rainbow.

Abstract

In this work we study black string solutions under the consideration of rainbow gravity. We have analytically obtained the solution for four-dimensional black strings in terms of the functions f(E/Ep) and g(E/Ep) that set the energy scale where the rainbow gravity becomes relevant. We have also obtained the Hawking temperature for the black string, from which we could see that the rainbow functions play the role of increasing or decreasing the Hawking temperature for a given horizon radius depending on the choice of such rainbow functions. We have computed the entropy, speciĄc heat and free energy for the black string. The entropy and speciĄc heat exhibit a rainbow dependence while the free energy is not modiĄed by the rainbow functions.