96 citations · 341 across the 16 of their papers we have counts for
7 papers · 1 filter
Nonlinear coupling between magnetar QPOs
Pantelis Pnigouras, Samuel K. Lander
The quasi-periodic oscillations (QPOs) observed in the tails of magnetar giant -ray flares have long been interpreted as normal oscillation modes of these stars. However, most s…
Dynamical tides in superfluid neutron stars
Andrea Passamonti, Nils Andersson, Pantelis Pnigouras
We study the tidal response of a superfluid neutron star in a binary system, focussing on Newtonian models with superfluid neutrons present throughout the star's core and the inner…
Dynamical tides in neutron stars: The impact of the crust
Andrea Passamonti, Nils Andersson, Pantelis Pnigouras
We consider the dynamical tidal response of a neutron star in an inspiralling binary, focussing on the impact of the star's elastic crust. Within the context of Newtonian gravity,…
Gravitational-wave-driven tidal secular instability in neutron star binaries
Pantelis Pnigouras
We report the existence of a gravitational-wave-driven secular instability in neutron star binaries, acting on the equilibrium tide. The instability is similar to the classic Chand…
Dark stars: gravitational and electromagnetic observables
Andrea Maselli, Pantelis Pnigouras, Niklas Gønlund Nielsen +2
Theoretical models of self-interacting dark matter represent a promising answer to a series of open problems within the so-called collisionless cold dark matter (CCDM) paradigm. In…
Saturation of the f-mode instability in neutron stars: II. Applications and results
Pantelis Pnigouras, Kostas D. Kokkotas
We present the first results on the saturation of the f-mode instability in neutron stars, due to nonlinear mode coupling. Emission of gravitational waves drives the f-mode (fundam…
Saturation of the f-mode instability in neutron stars: I. Theoretical framework
Pantelis Pnigouras, Kostas D. Kokkotas
The basic formulation describing quadratic mode coupling in rotating Newtonian stars is presented, focusing on polar modes. Due to the Chandrasekhar-Friedman-Schutz mechanism, the…