# Quasinormal modes of superfluid neutron stars

@article{Gualtieri2014QuasinormalMO, title={Quasinormal modes of superfluid neutron stars}, author={Leonardo Gualtieri and Elena M. Kantor and Mikhail E. Gusakov and Andrey I Chugunov}, journal={Physical Review D}, year={2014}, volume={90}, pages={024010} }

We study non-radial oscillations of neutron stars with superfluid baryons, in a general relativistic framework, including finite temperature effects. Using a perturbative approach, we derive the equations describing stellar oscillations, which we solve by numerical integration, employing different models of nucleon superfluidity, and determining frequencies and gravitational damping times of the quasi-normal modes. As expected by previous results, we find two classes of modes, associated to…

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## References

SHOWING 1-10 OF 114 REFERENCES

Dissipation in relativistic superfluid neutron stars

- Physics
- 2013

We analyze damping of oscillations of general relativistic superfluid neutron stars. To this aim we extend the method of decoupling of superfluid and normal oscillation modes first suggested in…

Adiabatic oscillations of non-rotating superfluid neutron stars

- Physics
- 2002

We present results concerning the linear (radial and non-radial) oscillations of non-rotating superfluid neutron stars in Newtonian physics. We use a simple two-fluid model to describe the superfluid…

Quasinormal modes of general relativistic superfluid neutron stars

- Physics
- 1999

We develop a general formalism to treat, in general relativity, the linear oscillations of a two-fluid star about static (non-rotating) configurations. Such a formalism is intended for neutron stars,…

Temperature-dependent pulsations of superfluid neutron stars

- Physics
- 2006

We examine radial oscillations of superfluid neutron stars at finite internal temperatures. For this purpose, we generalize the description of relativistic superfluid hydrodynamics to the case of…

Oscillations of dissipative superfluid neutron stars

- Physics
- 2009

We investigate the oscillations of slowly rotating superfluid stars, taking into account the vortex-mediated mutual friction force that is expected to be the main damping mechanism in mature neutron…

Temperature effects in pulsating superfluid neutron stars

- Physics
- 2011

We study the effects of finite stellar temperatures on the oscillations of superfluid neutron stars. The importance of these effects is illustrated with a simple example of a radially pulsating…

r -modes in superfluid neutron stars

- Physics
- 2000

The analogues of r-modes in superfluid neutron stars are studied here. These modes, which are governed primarily by the Coriolis force, are identical to their ordinary-fluid counterparts at the…

Nonradial superfluid modes in oscillating neutron stars

- Physics
- 2011

For the first time nonradial oscillations of superfluid nonrotating stars are self-consistently studied at finite stellar temperatures. We apply a realistic equation of state and realistic density…

The Oscillations of Superfluid Neutron Stars

- Physics
- 1994

The effects of superfluid hydrodynamics on the oscillations of neutron stars are investigated. The equations describing the small-amplitude pulsations of a neutron star's neutron-proton superfluid…

Decoupling of superfluid and normal modes in pulsating neutron stars

- Physics
- 2011

We show that equations governing pulsations of superfluid neutron stars can be split into two sets of weakly coupled equations, one describing the superfluid modes and another one, the normal modes.…