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Article

Exotic Cores with and without Dark-Matter Admixtures in Compact Stars

1
Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
2
Institut für Theoretische Physik, TU Dresden, 01062 Dresden, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Ignatios Antoniadis
Astronomy 2022, 1(1), 36-48; https://doi.org/10.3390/astronomy1010005
Received: 30 March 2022 / Revised: 19 May 2022 / Accepted: 24 May 2022 / Published: 29 May 2022
We parameterize the core of compact spherical star configurations by a mass (mx) and a radius (rx) and study the resulting admissible areas in the total-mass–total-radius plane. The employed fiducial equation-of-state models of the corona at radii r>rx and pressures ppx with p(r=rx)=px are that of constant sound velocity and a proxy of DYΔ DD-ME2 provided by Buchdahl’s exactly solvable ansatz. The core (r<rx) may contain any type of material, e.g., Standard-Model matter with unspecified equation of state or/and an unspecified Dark-Matter admixture. Employing a toy model for the cool equation of state with first-order phase transition, we also discuss the mass-radius relation of compact stars with an admixture of Dark Matter in a Mirror-World scenario. View Full-Text
Keywords: compact stars; mass-radius relation; equation of state; dark-matter admixtures compact stars; mass-radius relation; equation of state; dark-matter admixtures
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MDPI and ACS Style

Zöllner, R.; Kämpfer, B. Exotic Cores with and without Dark-Matter Admixtures in Compact Stars. Astronomy 2022, 1, 36-48. https://doi.org/10.3390/astronomy1010005

AMA Style

Zöllner R, Kämpfer B. Exotic Cores with and without Dark-Matter Admixtures in Compact Stars. Astronomy. 2022; 1(1):36-48. https://doi.org/10.3390/astronomy1010005

Chicago/Turabian Style

Zöllner, Rico, and Burkhard Kämpfer. 2022. "Exotic Cores with and without Dark-Matter Admixtures in Compact Stars" Astronomy 1, no. 1: 36-48. https://doi.org/10.3390/astronomy1010005

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