Free Energy of Anisotropic Strangeon Stars

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 $\gamma -$ray bursts, fast radio bursts and soft $\gamma -$ray repeaters. In this paper, the elastic/gravitational free energy of solid strangeon star 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 ($(p_{\mathrm{t}}-p_{\mathrm{r}})/p_{\mathrm{r}}\sim 10^{-4}$, with $p_{\mathrm{t}}$/$p_{\mathrm{r}}$ the tangential/radial pressure), implying pulsar-like stars could have great potential of free energy release without extremely strong magnetic fields in solid strangeon star model.

References in corpus (20)

• Sound Speeds, Cracking and Stability of Self-Gravitating Anisotropic Compact Objects
• Nuclear Force from Lattice QCD
• A bimodal burst energy distribution of a repeating fast radio burst source
• Neutrino-driven supernova of a low-mass iron-core progenitor boosted by three-dimensional turbulent convection
• A fast radio burst source at a complex magnetised site in a barred galaxy
• Diverse polarization angle swings from a repeating fast radio burst source
• The Dipole Magnetic Field and Spin-down Evolutions of The High Braking Index Pulsar PSR J1640-4631
• GeV emission from a compact binary merger
• The superflares of soft Gamma-ray repeatres: giant quakes in solid quark stars?
• Two types of glitches in a solid quark star model
• The Birth of Quark Stars: Photon-driven Supernovae?
• Rotation and deformation of strangeon stars in the Lennard-Jones model
• The dissipation of toroidal magnetic fields and spin-down evolution of young and strongly magnetized pulsars
• Oscillation Driven Magnetospheric Activity In Pulsars
• Pulsar glitches in a strangeon star model. II. The activity
• Bulk Strong Matter: the Trinity
• Rescaling strange-cluster stars and its implications on gravitational-wave echoes
• Quakes of Compact Stars
• Neutron Star versus Neutral Star: On the 90th anniversary of Landau's publication in astrophysics
• Relativistic stellar modeling with perfect fluid core and anisotropic envelope fluid

Cited by in corpus (5)

• Radial and Non-Radial Oscillations of Inverted Hybrid Stars
• Universal relations for anisotropic interacting quark stars
• On the energy budget of starquake-induced repeating fast radio bursts
• Strange Matter
• To detect strong nugget with an acoustic array