Статья

Neutron Stars and Dark Matter

A. Del Popolo, M. Le Delliou, M. Deliyergiyev,
2020

Neutron stars change their structure with accumulation of dark matter. We study how their mass is influenced from the environment. Close to the sun, the dark matter accretion from the neutron star does not have any effect on it. Moving towards the galactic center, the density increase in dark matter results in increased accretion. At distances of some fraction of a parsec, the neutron star acquire enough dark matter to have its structure changed. We show that the neutron star mass decreases going towards the galactic centre, and that dark matter accumulation beyond a critical value collapses the neutron star into a black hole. Calculations cover cases varying the dark matter particle mass, self-interaction strength, and ratio between the pressure of dark matter and ordinary matter. This allow us to constrain the interaction cross section, σdm, between nucleons and dark matter particles, as well as the dark matter self-interaction cross section.

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  • 1. Version of Record от 2020-11-26

Метаданные

Об авторах
  • A. Del Popolo
    Dipartimento di Fisica e Astronomia, University of Catania, Viale Andrea Doria 6, 95125 Catania, Italy;, adelpopolo@oact.inaf.it, Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya str., 48, 119017 Moscow, Russia, INFN Sezione di Catania, Via S. Sofia 64, 95123 Catania, Italy
  • M. Le Delliou
    Institute of Theoretical Physics, School of Physical Science and Technology, Lanzhou University, No. 222, South Tianshui Road, Lanzhou 730000, China, Instituto de Astrofísica e Ciências do Espaço, Universidade de Lisboa, Faculdade de Ciências, Ed. C8, Campo Grande, 1769-016 Lisboa, Portugal
  • M. Deliyergiyev
    Departement de Physique Nucleaire et Corpusculaire, University of Geneva, CH-1211 Geneve, Switzerland;, maksym.deliyergiyev@unige.ch
Название журнала
  • Universe
Том
  • 6
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  • 12
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  • 222
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  • MDPI
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  • journal article
Тип лицензии Creative Commons
  • CC BY
Правовой статус документа
  • Свободная лицензия
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  • dimensions