Properties of fermionic dark stars at finite temperature

A. Aprilia, A. Sulaksono

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In Cold Collisionless Dark Matter (CCDM) models, the impact of the temperature is to weaken the stiffness of the Equation of State (EoS) of dark matter (DM). Few discrepancies between the CDDM predictions with observations on a smaller scale such as galactic and sub-galactic structure was reported. The interacting DM is one of the possible answers to this issue. Here we study the impact of finite temperature on dark stars (DSs) composed by interacting fermion dark particles for the cases of fixed temperature and fixed entropy. We assume that the self-interaction among the fermionic dark particles is through the exchange of scalar and vector bosons, and we also use the relativistic mean-field (RMF) model to obtain the EoSs. The Tolman Oppenheimer Volkoff (TOV) equation is used to calculate the mass and radius of DS. For fixed entropy, we use entropy with a range of 5-7, while for a fixed temperature, we use temperature with a variety of 30-50 MeV. In general, we have found that the effects of increasing temperature and entropy make the DS EoS softer, and as the consequences are the maximum mass and the corresponding radius increase.

Original languageEnglish
Title of host publicationProceedings of the 5th International Symposium on Current Progress in Mathematics and Sciences, ISCPMS 2019
EditorsTerry Mart, Djoko Triyono, Tribidasari Anggraningrum Ivandini
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735420014
DOIs
Publication statusPublished - 1 Jun 2020
Event5th International Symposium on Current Progress in Mathematics and Sciences, ISCPMS 2019 - Depok, Indonesia
Duration: 9 Jul 201910 Jul 2019

Publication series

NameAIP Conference Proceedings
Volume2242
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference5th International Symposium on Current Progress in Mathematics and Sciences, ISCPMS 2019
Country/TerritoryIndonesia
CityDepok
Period9/07/1910/07/19

Keywords

  • Dark matter
  • dark stars
  • fermionic dark Matter
  • finite-temperature

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