paper

Gravitational Waves from Strange Star Core-Crust Oscillation

arXiv:2207.12053 · doi:10.3390/universe8090442

Abstract

According to the strange quark matter hypothesis, pulsars may actually be strange stars composed of self-bound strange quark matter. The normal matter crust of a strange star, unlike that of a normal neutron star, is supported by a strong electric field. A gap is then presented between the crust and the strange quark core. Therefore, peculiar core-crust oscillation may occur in a strange star, which can produce distinctive gravitational waves. In this paper, the waveforms of such gravitational waves are derived using a rigid model. We find that the gravitational waves are extremely weak and undetectable, even for the next-generation detectors. Therefore, the seismology of a strange star is not affected by the core-crust oscillation. Observers will have to search for other effects to diagnose the existence of the crust.

9 pages, 1 figure, published in the journal Universe as a contribution to the special issue "Advances in Astrophysics and Cosmology - in Memory of Prof. Tan Lu"

References in corpus (5)