Exploring non-radial oscillation modes in dark matter admixed neutron stars

Because of their extreme densities and consequently, gravitational potential, compact objects such as neutron stars can prove to be excellent captors of dark matter particles. Considering purely gravitational interactions between dark and hadronic matter, we construct dark matter admixed stars compo...

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Bibliographic Details
Published in:arXiv.org 2024-06
Main Authors: Thakur, Pratik, Kumar, Anil, Vivek Baruah Thapa, Parmar, Vishal, Sinha, Monika
Format: Article
Language:English
Subjects:
Dark matter
Deformation effects
Equations of state
Formability
Frequency ranges
Neutron stars
Neutrons
Oscillation modes
Parameterization
Parameters
Stellar oscillations
Stellar structure
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Summary:Because of their extreme densities and consequently, gravitational potential, compact objects such as neutron stars can prove to be excellent captors of dark matter particles. Considering purely gravitational interactions between dark and hadronic matter, we construct dark matter admixed stars composed of two-fluid matter subject to current astrophysical constraints of maximum mass and tidal deformability. We choose a wide range of parameters to construct the dark matter equation of state, and the DDME2 parameterization for the hadronic equation of state. We then examine the effect of dark matter on the stellar structure, tidal deformability and non-radial modes considering the relativistic Cowling approximation. We find the effect on \(p\)-modes is substantial, with frequencies decreasing up to the typical \(f-\)mode frequency range for most stars with a dark matter halo. The effects on the \(f-\)mode frequency are less extreme. Finally, we find the most probable and \(1\sigma\) values of the dark matter parameters used in this study.
ISSN:2331-8422