Accuracy of the relativistic Cowling approximation in protoneutron star asteroseismology
Accuracy of the relativistic Cowling approximation in protoneutron star asteroseismology
The relativistic Cowling approximation, where the metric perturbations are neglected during the fluid oscillations, is often adopted for considering the gravitational waves from the protoneutron stars (PNSs) provided via core-collapse supernova explosions. In this study, we evaluate how the Cowling approximation works well by comparing the frequencies with the Cowling …