Anisotropy's Impact on Neutron Star Properties
Published:Dec 30, 2025 12:53
•1 min read
•ArXiv
Analysis
This paper investigates how pressure anisotropy within neutron stars, modeled using the Bowers-Liang model, affects their observable properties (mass-radius relation, etc.) and internal gravitational fields (curvature invariants). It highlights the potential for anisotropy to significantly alter neutron star characteristics, potentially increasing maximum mass and compactness, while also emphasizing the model dependence of these effects. The research is relevant to understanding the extreme physics within neutron stars and interpreting observational data from instruments like NICER and gravitational-wave detectors.
Key Takeaways
- •Anisotropy in neutron stars can significantly impact their properties, including mass, radius, and compactness.
- •The Bowers-Liang model is used to explore the effects of anisotropic pressure.
- •Anisotropy can potentially increase the maximum mass and compactness of neutron stars.
- •The study highlights the model dependence of anisotropic effects, emphasizing the need for caution in interpreting results.
Reference
“Moderate positive anisotropy can increase the maximum supported mass up to approximately $2.4\;M_\odot$ and enhance stellar compactness by up to $20\%$ relative to isotropic configurations.”