Masses and radii of neutron and quark stars

TL;DR

This paper explores new constraints on neutron and quark star masses and radii, suggesting two distinct classes of compact stars and estimating the critical mass for transition between them.

Contribution

It introduces the concept of two star classes and estimates the critical mass for their transition, providing new insights into compact star properties.

Findings

Identification of two classes of compact stars

Estimation of the critical mass for star transition

New limits on star masses and radii

Abstract

We discuss new limits on masses and radii of compact stars and we conclude that they can be interpreted as an indication of the existence of two classes of stars: "normal" compact stars and "ultra-compact" stars. We estimate the critical mass at which the first configuration collapses into the second.