Détail du document
Identifiant
oai:arXiv.org:2409.07328
Sujet
Astrophysics - High Energy Astroph... General Relativity and Quantum Cos...Auteur
Rahimi, Fahimeh Rezaei, ZeinabCatégorie
sciences : astrophysique
Année
2024
Date de référencement
18/09/2024
Mots clés
field admixed scalar matter dark central stars scalarized pressureRésumé
Dark matter, an important portion of compact objects, can influence different phenomena in neutron stars.
The spontaneous scalarization in the scalar-tensor gravity has been proposed for neutron stars.
Here, we investigate the spontaneous scalarization in dark matter admixed neutron stars.
Applying the dark matter equations of state, we calculate the structure of scalarized neutron stars containing dark matter.
The dark matter equations of state are based on observational data from the rotational curves of galaxies and the fermionic self-interacting dark matter.
Our results verify that the spontaneous scalarization is affected by the dark matter pressure in neutron stars.
Depending on the central density of scalarized dark matter admixed neutron stars, the dark matter pressure alters the central scalar field.
The increase of dark matter pressure in low-density scalarized stars amplifies the central scalar field.
However, the pressure of dark matter in high-density scalarized stars suppresses the central scalar field.
Our calculations confirm that the stars in the merger event GW170817 and in the low-mass X-ray binary 4U 1820-30 can be scalarized dark matter admixed neutron stars.
;Comment: 23 pages, 11 figures.
Accepted for publication in European Physical Journal C
Rahimi, Fahimeh,Rezaei, Zeinab, 2024, Effects of Dark Matter on the Spontaneous Scalarization in Neutron Stars
