| Name: Debanjan Guha Roy Affiliation: Birla Institute of Technology and Science Pilani, Hyderabad Campus Conference ID: ASI2023_715 Title : Quasinormal mode oscillations of a neutron star Authors and Co-Authors : Debanjan Guha Roy, Swastik Bhattacharya, Sarmistha Banik (Birla Institute of Technology and Science Pilani, Hyderabad Campus) Abstract Type : Poster Abstract Category : General Relativity and Cosmology Abstract : Quasinormal mode oscillations of a neutron star decay by emission of gravitational waves. These gravitational waves carry imprints of physical phenomena occurring inside the star, which is otherwise inaccessible from outside. We solve the perturbation equations describing the fluid oscillations derived from the linearised Einstein equations. We can assume spacetime oscillations happening outside to represent outgoing gravitational waves only. The fluid oscillations in the interior and the spacetime oscillations outside the star with a given polytropic equation of state define the complete eigenvalue problem. Solving the equations with appropriate boundary conditions, we find the quasinormal mode frequency of various modes. |