scholarly journals Axial quasi-normal modes of neutron stars: accounting for the superfluid in the crust

2009 ◽  
Vol 26 (15) ◽  
pp. 155016 ◽  
Author(s):  
Lars Samuelsson ◽  
Nils Andersson
Keyword(s):  
Neutron Stars ◽  
Normal Modes

scholarly journals Ultra-long-lived quasi-normal modes of neutron stars in massive scalar-tensor gravity

2020 ◽  
Vol 130 (5) ◽  
pp. 50002 ◽  
Author(s):  
Jose Luis Blázquez-Salcedo ◽  
Fech Scen Khoo ◽  
Jutta Kunz
Keyword(s):  
Neutron Stars ◽  
Normal Modes ◽  
Massive Scalar

Rapidly rotating relativistic stars

1992 ◽  
Vol 340 (1658) ◽  
pp. 391-422 ◽  
Keyword(s):  
Neutron Stars ◽  
Numerical Models ◽  
Normal Modes ◽  
Rotating Stars ◽  
Relativistic Stars ◽  
Small Oscillations ◽  
Perfect Fluids ◽  
Upper Limits ◽  
Viscosity Limit

Within the last decade, significant progress has been made in modelling rotating stars in general relativity and in relating observable properties to the equation of state of matter at high density. A formalism describing rotating perfect fluids is presented and numerical models of neutron stars are briefly discussed, with emphasis on upper limits on mass and rotation. The equations governing small oscillations are reviewed, and a variational principle appropriate both to eulerian and lagrangian perturbations is obtained. This extends to relativity an eulerian principle used to find non-axisymmetric stability points for perfect fluids. A related eulerian approach has been recently used to obtain normal modes of rotating newtonian stars. The review concludes with an outline of this work and of the two types of instability that can restrict the range of neutron stars. In particular, current work shows that several kinds of effective viscosity limit the possible role of a non-axisymmetric instability driven by gravitational waves.

Nonradial oscillations of neutron stars: A new branch of strongly damped normal modes

1993 ◽  
Vol 48 (8) ◽  
pp. 3467-3472 ◽  
Author(s):  
M. Leins ◽  
H. -P. Nollert ◽  
M. H. Soffel
Keyword(s):  
Neutron Stars ◽  
Normal Modes ◽  
Strongly Damped ◽  
Nonradial Oscillations

Universal relations for quasi-normal modes of realistic neutron stars containing exotic matter

2017 ◽  
Author(s):  
Luis M. González-Romero ◽  
Jose L. Blázquez-Salcedo ◽  
Francisco Navarro-Lérida
Keyword(s):  
Neutron Stars ◽  
Normal Modes ◽  
Exotic Matter

DETECTING QUASI-NORMAL MODES FROM NEUTRON STARS AND BLACK HOLES

2007 ◽  
Vol 16 (02n03) ◽  
pp. 319-323 ◽  
Author(s):  
G. F. MARRANGHELLO
Keyword(s):  
Black Holes ◽  
Neutron Stars ◽  
Gravitational Wave ◽  
Normal Modes ◽  
Great Relevance

The properties of relativistic perturbations of neutron stars and black holes are discussed. They are of great relevance in the study of gravitational wave astronomy. In this work, we review the properties of quasi-normal modes of neutron stars and Schwarzschild black holes and the main features of their detection by actual gravitational wave interferometers.

scholarly journals Decoupling of superfluid and normal modes in pulsating neutron stars

2011 ◽  
Vol 83 (8) ◽  
Author(s):  
Mikhail E. Gusakov ◽  
Elena M. Kantor
Keyword(s):  
Neutron Stars ◽  
Normal Modes

Neutron stars

2018 ◽  
Author(s):  
Michele Maggiore
Keyword(s):  
Neutron Stars ◽  
Normal Modes ◽  
Mode Instability

Observation of neutron stars as pulsars. Pulsar demography. Magnetars. GW emission from neutron stars. Normal modes of neuton stars. CFS instability; r-mode instability. GWs from the post-merger NS remnant. Ellipticity of deformed neutron stars.

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