Normal and Quasinormal Modes of Holographic Multiquark Star
arXiv:2208.02761 · doi:10.1103/PhysRevD.107.023020
Abstract
The quadrupole normal-mode oscillation frequency of multiquark star are computed for . At the transition from low to high density multiquark in the core region, the first 2 modes jump to larger values, a distinctive signature of the presence of the high-density core. When the star oscillation couples with spacetime, gravitational waves~(GW) will be generated and the star will undergo damped oscillation. The quasinormal modes~(QNMs) of the oscillation are computed using two methods, direct scan and WKB, for QNMs with small and large imaginary parts respectively. The small imaginary QNMs have frequencies kHz and damping times secs for multiquark star with mass ~(solar mass). The WKB QNMs with large imaginary parts have frequencies kHz and damping times ms for . They are found to be the fluid modes and spacetime curvature modes respectively.
9 pages, 8 figures
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