6 papers
Nonlinear hydrodynamics in spinning neutron stars: Theoretical universal relations and equilibrium solutions
Hang Yu, Giorgio Nicolini, Shu Yan Lau +6
We study tides during the inspiral of a binary neutron star system, including nonlinear hydrodynamical interactions. Using an affine approximation that treats the perturbed neutron…
Axion condensates in neutron stars and radial oscillation modes
Antonio Gómez-Bañón, Pantelis Pnigouras, José A. Pons
Light QCD axions, introduced to solve the strong CP problem, may form condensates inside neutron stars, giving rise to a novel ground state of dense matter. We investigate how such…
ESO Expanding Horizon White Paper: Revealing the properties of matter at supranuclear densities with gravitational waves
Tim Dietrich, Tanja Hinderer, Micaela Oertel +40
Understanding dense matter under extreme conditions is one of the most fundamental puzzles in modern physics. Complex interactions give rise to emergent, collective phenomena. Whil…
Dynamical neutron-star tides: The signature of a mode resonance
P. Pnigouras, N. Andersson, F. Gittins +1
Motivated by future opportunities in gravitational-wave astronomy and the ongoing effort to constrain physics under extreme conditions, we consider the signature of individual mode…
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…
Neutron star g-modes in the relativistic Cowling approximation
Rhys Counsell, Fabian Gittins, Nils Andersson +1
Mature neutron stars are expected to exhibit gravity g-modes due to stratification caused by a varying matter composition in the high-density core. By employing the BSk equation of…