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Saturation of the f-mode Instability in Neutron Stars

  • Fester Einband
  • 220 Seiten
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This book presents a study of the saturation of unstable f-modes (fundamental modes) due to low-order nonlinear mode coupling. Sin... Weiterlesen
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Beschreibung

This book presents a study of the saturation of unstable f-modes (fundamental modes) due to low-order nonlinear mode coupling. Since their theoretical prediction in 1934, neutron stars have remained among the most challenging objects in the Universe. Gravitational waves emitted by unstable neutron star oscillations can be used to obtain information about their inner structure, that is, the equation of state of dense nuclear matter. After its initial growth phase, the instability is expected to saturate due to nonlinear effects. The saturation amplitude of the unstable mode determines the detectability of the generated gravitational-wave signal, but also affects the evolution of the neutron star. The study shows that the unstable (parent) mode resonantly couples to pairs of stable (daughter) modes, which drain the parent's energy and make it saturate via a mechanism called parametric resonance instability. Further, it calculates the saturation amplitude of the most unstable f-mode multipoles throughout their so-called instability windows.



Inhalt

Introduction.- The Oscillation Modes: Linear Perturbation Scheme.- The f-mode Instability.- Mode Coupling: Quadratic Perturbation Scheme.- Results.- Final Remarks.

Produktinformationen

Titel: Saturation of the f-mode Instability in Neutron Stars
Autor:
EAN: 9783319982571
ISBN: 978-3-319-98257-1
Format: Fester Einband
Genre: Physik & Astronomie
Anzahl Seiten: 220
Gewicht: 520g
Größe: H20mm x B248mm x T160mm
Jahr: 2018
Auflage: 1st ed. 2018

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