Speaker
GABRIELA ALEJANDRA VALENCIA ZUÑIGA
(Universidad del Valle)
Description
In this work, we investigate the growth of cosmological perturbations within a cosmological scenario where the early universe is dominated by dark matter and gradually becomes anisotropic at later times due to the presence of a small shear tensor associated with dark energy. To describe this, we employ the Bianchi I metric, which characterizes a spacetime background that is homogeneous but anisotropic. The equations of motion for a dark matter fluid are derived and solved both at linear and non-linear orders. This study is performed using a constant equation of state for the dark energy component and a time-dependent rate of anisotropic expansion.
Authors
Cesar A. Valenzuela-Toledo
(Departamento de Física, Universidad del Valle)
GABRIELA ALEJANDRA VALENCIA ZUÑIGA
(Universidad del Valle)
Dr
Josué Motoa-Manzano
(Universidad del Valle)
