Nonequilibrium thermodynamics of accreted neutron-star crust
| Autor: | Mikhail E. Gusakov, Andrey I. Chugunov, Elena M. Kantor |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Nuclear reaction Physics Nuclear Theory Equation of state (cosmology) Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Non-equilibrium thermodynamics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Accretion (astrophysics) Gibbs free energy Thermodynamic potential Nuclear Theory (nucl-th) Neutron star symbols.namesake symbols Astrophysics::Solar and Stellar Astrophysics Neutron Astrophysics::Earth and Planetary Astrophysics Astrophysics - High Energy Astrophysical Phenomena Astrophysics::Galaxy Astrophysics |
| Zdroj: | Physical Review D. 104 |
| ISSN: | 2470-0029 2470-0010 |
| DOI: | 10.1103/physrevd.104.l081301 |
| Popis: | We show that, in order to determine the equation of state of the inner crust of an accreting neutron star, one should minimize not the Gibbs free energy, as it is generally assumed in the literature, but a different thermodynamic potential $\Psi$, which tends to the minimum at fixed pressure and neutron chemical potential. Once this potential is specified, one can calculate the heat-release distribution in the stellar crust due to nonequilibrium nuclear reactions induced by accretion of matter onto the neutron-star surface. The results are important for adequate modeling of the accreted crust and interpretation of the observations of accreting neutron stars in low-mass X-ray binaries. Comment: 6 pages, accepted for publication in Phys. Rev. D (Letters) |
| Databáze: | OpenAIRE |
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