105 citations · 1.2k across the 30 of their papers we have counts for
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Non-axisymmetric oscillations of differentially rotating relativistic stars
Andrea Passamonti, Adamantios Stavridis, Kostas Kokkotas
Non-axisymmetric oscillations of differentially rotating stars are studied using both slow rotation and Cowling approximation. The equilibrium stellar models are relativistic polyt…
Gravitational Waves from Nonlinear Couplings of Radial and Polar Nonradial Modes in Relativistic Stars
Andrea Passamonti, Nikolaos Stergioulas, Alessandro Nagar
The post-bounce oscillations of newly-born relativistic stars are expected to lead to gravitational-wave emission through the excitation of nonradial oscillation modes. At the same…
Nonradial oscillations of slowly and differentially rotating compact stars
Adamantios Stavridis, Andrea Passamonti, Kostas Kokkotas
The equations describing nonradial adiabatic oscillations of differentially rotating relativistic stars are derived in relativistic slow rotation approximation. The differentially…
Non-linear Oscillations of Compact Stars and Gravitational Waves
Andrea Passamonti
This thesis investigates in the time domain a particular class of second order perturbations of a perfect fluid non-rotating compact star: those arising from the coupling between f…
Coupling of Radial and Axial non-Radial Oscillations of Compact Stars: Gravitational Waves from first-order Differential Rotation
A. Passamonti, M. Bruni, L. Gualtieri +2
We investigate the non-linear coupling between radial and non-radial oscillations of static spherically symmetric neutron stars as a possible mechanism for the generation of gravit…
Coupling of radial and non-radial oscillations of Neutron stars
Andrea Passamonti, Marco Bruni, Leonardo Gualtieri +1
This is a progress report on our study of the coupling of first-order radial and non-radial relativistic perturbations of a static spherical star. Our goal is to investigate the ef…
Coupling of radial and non-radial oscillations of relativistic stars: gauge-invariant formalism
Andrea Passamonti, Marco Bruni, Leonardo Gualtieri +1
Linear perturbation theory is appropriate to describe small oscillations of stars, while a mild non-linearity is still tractable perturbatively but requires to consider mode coupli…