Abstract
Abstract
We study the tideless traversable wormholes in the f(R) gravity metric
formalism. First we consider three shape functions of wormholes and study
their viabilities and structures. The connection between the f(R) gravity
model and wormhole shape function has been studied and the dependency of the
f(R) gravity model with the shape function is shown. We also obtain a
wormhole solution in the f(R) gravity Starobinsky model surrounded by a
cloud of strings. In this case, the wormhole shape function depends on both
the Starobinsky model parameter and the cloud of strings parameter. The
structure and height of the wormhole is highly affected by the cloud of
strings parameter, while it is less sensitive to the Starobinsky model
parameter. The energy conditions have been studied and we found the ranges of
the null energy condition violation for all wormhole structures. The
quasinormal modes from these wormhole structures for the scalar and Dirac
perturbations are studied using higher order WKB approximation methods. The
quasinormal modes for the toy shape functions depend highly on the model
parameters. In case of the Starobinsky model's wormhole the quasinormal
frequencies and the damping rate increase with an increase in the Starobinsky
model parameter in scalar perturbation. Whereas in Dirac perturbation, with
an increase in the Starobinsky model parameter the quasinormal frequencies
decrease and the damping rate increases. The cloud of strings parameter also
impacts prominently and differently the quasinormal modes from the wormhole
in the Starobinsky model.
Subject
Astronomy and Astrophysics
Cited by
14 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献