Review
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Magneter QPOs and Neutron Star Crust Elasticity
Version 1
: Received: 15 April 2024 / Approved: 16 April 2024 / Online: 16 April 2024 (10:24:42 CEST)
How to cite: Sotani, H. Magneter QPOs and Neutron Star Crust Elasticity. Preprints 2024, 2024041021. https://doi.org/10.20944/preprints202404.1021.v1 Sotani, H. Magneter QPOs and Neutron Star Crust Elasticity. Preprints 2024, 2024041021. https://doi.org/10.20944/preprints202404.1021.v1
Abstract
The crust region is a tiny fraction of neutron stars, but it has a variety of physical properties and plays an important role in astronomical observations. One of the properties characterizing the crust is the elasticity. In this review, with the approach of asteroseismology, we systematically examine neutron star oscillations excited by crust elasticity, adopting the Cowling approximation. In particular, by identifying the quasi-periodic oscillations observed in magnetar flares with the torsional oscillations, we make a constraint on the nuclear saturation parameters. In addition, we also discuss how the shear and interface modes depend on the neutron star properties. Once one detects an additional signal associated with neutron star oscillations, one can get a more severe constraint on the saturation parameters and/or neutron star properties, which must be a qualitatively different constraint obtained from terrestrial experiments, and help us to complementarily understand astrophysics and nuclear physics.
Keywords
neutron stars; equation of state; asteroseismology
Subject
Physical Sciences, Astronomy and Astrophysics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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