Document detail
ID

oai:arXiv.org:2408.16583

Topic
Astrophysics - High Energy Astroph... High Energy Physics - Phenomenolog...
Author
Marzola, Isabella Rodrigues, Everson H. Coelho, Anderson F. Lourenço, Odilon
Category

sciences: astrophysics

Year

2024

listing date

3/19/2025

Keywords
bosonic dark stars matter
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Abstract

In this work, we explore the possible scenario of strange stars admixed with fermionic or bosonic dark matter.

For the description of the ``visible'' sector, we use a specific phenomenological quark model that takes into account in-medium effects for the quark masses through a suitable baryonic density dependence, in which the free parameters are chosen from the analysis of the stellar matter stability window (parametrizations presenting lower energy per baryon than iron nuclei).

In the case of the dark sector, we investigate the predictions of fermionic and bosonic models.

In the former, we consider a spin $1/2$ dark particle, and the latter is described by a dark scalar meson.

Both models present a repulsive vector interaction, particularly important for the bosonic model since it helps avoid the collapse of the star due to the lack of degeneracy pressure.

Our results point out possible stable strange stars configurations in agreement with data from the NASA NICER measurements of the pulsars PSR J0030+0451 and PSR J0740+6620, including the latest observational data, as well as the observed HESS J1731-347 mass-radius relationship.

As another feature, we find stars with dark matter halo configurations for lower values of the dark particle mass.

;Comment: Version accepted for publication in PRD

Marzola, Isabella,Rodrigues, Everson H.,Coelho, Anderson F.,Lourenço, Odilon, 2024, Strange stars admixed with dark matter: equiparticle model in a two fluid approach

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