Coulomb crystals in neutron star crust

2nd International Symposium on the Modern Physics of Compact Stars and Relativistic Gravity

物理学;天文学

Baiko, D.A.^1

A.F. Ioffe Physical Technical Institute, Saint-Petersburg, Russia^1

关键词: Coulomb crystals;    Elastic properties;    Electron gas polarizability;    Mass densities;    Nearly incompressible;    Neutron stars;    Single species;    Strong magnetic fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/496/1/012010/pdf
DOI  :  10.1088/1742-6596/496/1/012010

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

It is well known that neutron star crust in a wide range of mass densities and temperatures is in a crystal state. At a given density, the crystal is made of fully ionized atomic nuclei of a single species immersed in a nearly incompressible (i.e., constant and uniform) charge compensating background of electrons. This model is known as the Coulomb crystal model. In this talk we analyze thermodynamic and elastic properties of the Coulomb crystals and discuss various deviations from the ideal model. In particular, we study the Coulomb crystal behavior in the presence of a strong magnetic field, consider the effect of the electron gas polarizability, outline the main properties of binary Coulomb crystals, and touch the subject of quasi-free neutrons permeating the Coulomb crystal of ions in deeper layers of neutron star crust.