Restricting quark matter models by gravitational wave observation

TL;DR

This paper explores how future gravitational wave observations of quark star oscillations can constrain the quark matter equation of state, particularly the bag constant, independently of the strange quark mass.

Contribution

It introduces a method to use gravitational wave data to determine quark matter parameters, focusing on nonradial oscillations of quark stars.

Findings

Observation of specific oscillation modes can constrain the bag constant B.

Simultaneous measurement of radiation radius improves parameter estimation.

Method is independent of the strange quark mass.

Abstract

We consider the possibilities for obtaining information about the equation of state for quark matter by using future direct observational data on gravitational waves. We study the nonradial oscillations of both fluid and spacetime modes of pure quark stars. If we observe the $f$ and the lowest $w_{\rm II}$ modes from quark stars, by using the simultaneously obtained radiation radius we can constrain the bag constant $B$ with reasonable accuracy, independently of the $s$ quark mass.