Radial oscillations of quark stars admixed with dark matter

TL;DR

This paper studies the radial oscillations of quark stars mixed with dark matter, revealing how dark matter properties can significantly alter star stability and potentially lead to new exotic compact objects.

Contribution

It introduces a model of admixed quark and dark matter stars and analyzes how dark matter mass and interactions affect their oscillation frequencies and stability.

Findings

Dark matter can dramatically modify fundamental oscillation frequencies.

Stable dark strange planets and strangelets with low masses can form.

Dark matter properties influence the stability and structure of quark stars.

Abstract

We investigated compact stars consisting of cold quark matter and fermionic dark matter treated as two admixed fluids. We computed the stellar structures and fundamental radial oscillation frequencies for different masses of the dark fermion in the cases of weak and strong self-interacting dark matter. We found that the fundamental frequency can be dramatically modified and, in some cases, stable dark strange planets and dark strangelets with very low masses and radii can be formed.