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Dynamic Model of a Non-equilibrium Chemical Composition Formation in the Shell of Single Neutron Stars

Astronomy Reports volume 66, pages 221–235 (2022)Cite this article

Abstract

The process of a non-equilibrium chemical composition formation during cooling due to neutrino energy loss in the shells of hot, formed neutron stars is considered. A model constructed is to explain the presence of a large quantity of nuclear energy accumulated, which can maintain the X-ray luminosity of such compact objects for a long period of time. The study of the numerically obtained final chemical composition dependence on various parameters of the medium has been carried out.

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ACKNOWLEDGMENTS

The authors are grateful to I. V. Panov for providing and indicating the nuclear data source [40] used in this article.

Funding

The work was supported by the Russian Foundation for Basic Research, grant no. 20-02-00455.

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Authors and Affiliations

  1. Space Research Institute, Russian Academy of Sciences, Moscow, Russia

    A. Yu. Ignatovskiy & G. S. Bisnovatyi-Kogan

  2. Moscow Institute of Physics and Technology, Moscow, Russia

    A. Yu. Ignatovskiy & G. S. Bisnovatyi-Kogan

  3. Institute for Theoretical and Experimental Physics of National Research Centr “Kurchatov Institute”, Moscow, Russia

    A. Yu. Ignatovskiy

  4. National Research Center “Kurchatov Institute”, Moscow, Russia

    A. Yu. Ignatovskiy

  5. Moscow Engineering Physics Institute, Moscow, Russia

    G. S. Bisnovatyi-Kogan

Authors
  1. A. Yu. Ignatovskiy
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  2. G. S. Bisnovatyi-Kogan
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Correspondence to A. Yu. Ignatovskiy.

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Ignatovskiy, A.Y., Bisnovatyi-Kogan, G.S. Dynamic Model of a Non-equilibrium Chemical Composition Formation in the Shell of Single Neutron Stars. Astron. Rep. 66, 221–235 (2022). https://doi.org/10.1134/S1063772922030039

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  • DOI: https://doi.org/10.1134/S1063772922030039

Keywords:

  • nuclear astrophysics
  • nuclear statistical equilibrium
  • non-equilibrium chemical composition