2024/12/12 by Zhong-Hao Tu, A. Li, Tu, Zhong-Hao +1 · 1 citation
Computer Science · Earth and Planetary Sciences · Physics and Astronomy · #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Nuclear Theory (nucl-th) #Pulsars and Gravitational Waves Research #Seismology and Earthquake Studies #Solar and Stellar Astrophysics (astro-ph.SR) #earthquake and tectonic studies
paper · pdf · doi:10.48550/arxiv.2412.09219
openalex publication_date 2024/12/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We connect nuclear forces to one of the most notable irregular behaviors observed in pulsars, already detected in approximately 6% known pulsars, with increasingly accurate data expected from upcoming high-precision timing instruments on both ground and space. Built on Shang & Li (2021), we conduct a case study on the 2001 glitch of the Vela pulsar. For our purpose, we adopt the Relativistic Mean Field (RMF) model as the theoretical many-body framework to describe nuclear systems. We refit three representative RMF parameter sets (DD-ME2, PKDD, NL3), considering the uncertainties in nuclear matter saturation properties. Utilizing the resulting star structure, composition and nucleon properties in the medium obtained in a consistent manner, we calculate the pinning energy of superfluid vortex in the nuclear lattice in the inner crust. This leads to the evolution of associated pinning force that acts on the vortex, which can be confronted with observed glitch amplitude and short-time relaxation in the 2000 Vela glitch event, following the snowplow model of pulsar glitch. We discuss how the vortex configuration and pinning properties depend on the nuclear parameters, and find an interesting and dominant role of the nuclear symmetry energy slope on pinning strength.