Gravitational Waves from Strange Star Core-Crust Oscillation
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.
Cite
@article{arxiv.2207.12053,
title = {Gravitational Waves from Strange Star Core-Crust Oscillation},
author = {Ze-Cheng Zou and Yong-Feng Huang and Xiao-Li Zhang},
journal= {arXiv preprint arXiv:2207.12053},
year = {2022}
}
Comments
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"