Speaker
Description
We explore the structure, rotation, and non-radial oscillations of
anisotropic dark energy stars, by modeling the matter using a modified Chaplygin
equation of state and adopting the Bowers–Liang prescription for anisotropic
pressure. We first extend stellar equilibrium to slowly rotating configurations under
anisotropy, solving the structure equations to obtain mass, radius, deformation,
angular momentum, moment of inertia, and quadrupole moment, and quantify how
anisotropy impacts these global properties. We then analyze non-radial $f$-mode
oscillations (for $l=2$) within the Cowling approximation, comparing isotropic
versus anisotropic models and exploring how varying anisotropy modifies the
oscillation spectra. We find that rotation under anisotropy induces significant
deformation and alters global properties, while the $f$-mode spectra show distinct
signatures that may differentiate dark energy stars from neutron or quark stars.
Our results suggest that combining rotational and oscillation behavior in anisotropic
dark energy stars provides new observable handles for their astrophysical
identification.
