Free Energy of Anisotropic Strangeon Stars

作者：Shichuan Chen, Yong Gao, Enping Zhou, Renxin Xu · 发表于：Research in Astronomy and Astrophysics · 年份：2023 · DOI：10.1088/1674-4527/ad1430 · 被引用次数：8 · 研究领域：Pulsars and Gravitational Waves Research、Gamma-ray bursts and supernovae、Astrophysical Phenomena and Observations

Abstract Can pulsar-like compact objects release further huge free energy besides the kinematic energy of rotation? This is actually relevant to the equation of state of cold supra-nuclear matter, which is still under hot debate. Enormous energy is surely needed to understand various observations, such as γ -ray bursts, fast radio bursts and soft γ -ray repeaters. In this paper, the elastic/gravitational free energy of solid strangeon stars is revisited for strangeon stars, with two anisotropic models to calculate in general relativity. It is found that huge free energy (>10 46 erg) could be released via starquakes, given an extremely small anisotropy (( p t − p r )/ p r ∼ 10 −4 , with p t / p r the tangential/radial pressure), implying that pulsar-like stars could have great potential of free energy release without extremely strong magnetic fields in the solid strangeon star model.