Distinguishing Newly Born Strange Stars from Neutron Stars with g-Mode Oscillations

TL;DR

This paper proposes a method to distinguish newly born strange quark stars from neutron stars by analyzing their g-mode oscillation frequencies, which differ significantly due to their particle compositions, using gravitational wave detection.

Contribution

It introduces a novel approach to differentiate SQSs from NSs based on their g-mode eigenfrequencies measured via gravitational waves.

Findings

SQSs have eigenfrequencies nearly ten times lower than NSs.

Relativistic particles in SQSs cause lower g-mode frequencies.

Detection of these frequencies can identify the type of compact star.

Abstract

The gravity-mode (g-mode) eigenfrequencies of newly born strange quark stars (SQSs) and neutron stars (NSs) are studied. It is found that the eigenfrequencies in SQSs are much lower than those in NSs by almost one order of magnitude, since the components of a SQS are all extremely relativistic particles while nucleons in a NS are non-relativistic. We therefore propose that newly born SQSs can be distinguished from the NSs by detecting the eigenfrequencies of the g-mode pulsations of supernovae cores through gravitational radiation by LIGO-class detectors.