arXiv Open Access 2023

Neutron Star Atmosphere-Ocean Dynamics

Joonas Nättilä James Y-K. Cho Jack W. Skinner Elias R. Most Bart Ripperda

Lihat Sumber

Abstrak

We analyze the structure and dynamics of the plasma atmospheres and Coulomb-liquid oceans on neutron stars. Salient dynamical parameters are identified and their values estimated for the governing set of magnetohydrodynamics equations. Neutron star atmospheres and oceans are strongly stratified and, depending on the rotation period, contain a multitude of long-lived vortices (spots) and/or narrow zonal jets (free-shear zones) in the large plasma-beta regime - i.e., $β_p \gg 1$ (hydrodynamic regime). In contrast, when $β_p \lesssim 1$ (magnetohydrodynamic regime), the flow is dominated by a global lattice of effectively fixed magnetic islands (plasmoids) - without any jets. Understanding the spatio-temporal variability of dynamic atmospheres and oceans on neutron stars is crucial for interpreting observations of their X-ray emissions.

Topik & Kata Kunci

astro-ph.HE astro-ph.SR

Penulis (5)

Joonas Nättilä

James Y-K. Cho

Jack W. Skinner

Elias R. Most

Bart Ripperda

Format Sitasi

APA MLA BibTeX

Nättilä, J., Cho, J.Y., Skinner, J.W., Most, E.R., Ripperda, B. (2023). Neutron Star Atmosphere-Ocean Dynamics. https://arxiv.org/abs/2306.08186

Akses Cepat

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Informasi Jurnal

Tahun Terbit: 2023
Bahasa: en
Sumber Database: arXiv
Akses: Open Access ✓