Regular Article - Theoretical Physics
Tidal deformation and radial pulsations of neutron star with holographic multiquark core
High Energy Physics Theory Group, Department of Physics, Faculty of Science, Chulalongkorn University, 10330, Bangkok, Thailand
2 Department of Physics, Faculty of Science, Kasetsart University, 10900, Bangkok, Thailand
3 Department of Physics, Faculty of Science, Silpakorn University, 73000, Nakhon Pathom, Thailand
Accepted: 5 February 2022
Published online: 15 February 2022
Tidal deformation of neutron star with multiquark core is calculated using nuclear and multiquark equations of state. The equation of state of the multiquark phase from the holographic Sakai-Sugimoto (SS) model is relatively stiff in the low density region and becomes softer at high densities. The values of Love number and dimensionless deformation parameter, and , are found to be within the physically viable range under the present constraints. Radial pulsation frequencies of the multiquark core for modes are calculated for the entire mass range. For , the fundamental-mode frequency is approximately 2.5 kHz for the energy density scale GeV/fm of the holographic SS model, this frequency is proportional to .
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