Oscillation Modes of Strange Quark Stars with a Strangelet Crust

Abstract

We study the non-radial oscillation modes of strange quark stars with a homogeneous core and a crust made of strangelets. Using a 2-component equation of state (core+crust) for strange quark stars that can produce stars as heavy as 2 solar masses, we identify the high-frequency l=2 spheroidal (f, p) in Newtonian gravity, using the Cowling approximation. The results are compared to the case of homogeneous compact stars such as polytropic neutron stars, as well as bare strange stars. We find that the strangelet crust only increases very slightly the frequency of the spheroidal modes, and that Newtonian gravity overestimates the mode frequencies of the strange star, as is the case for neutron stars.

8 pages, 6 figures. Contribution to Proceedings of CSQCD V (Compact Stars in the QCD Phase Diagram V, GSSI, L'Aquila, Italy)

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• GW151226: Observation of Gravitational Waves from a 22-Solar-Mass Binary Black Hole Coalescence
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Cited by in corpus (4)

• Quark Stars in 4D Einstein-Gauss-Bonnet gravity with an Interacting Quark Equation of State
• Non-radial Oscillation Modes of Compact Stars with a Crust
• Anisotropic Quark Stars with an Interacting Quark Equation of State
• Anisotropic solution for polytropic stars in 4D Einstein-Gauss-Bonnet gravity