# How to Test the Two-Families Scenario

## TL;DR

This paper reviews the two-families scenario where hadronic and strange quark stars coexist, discussing observable predictions like masses and radii, and identifying candidate strange quark stars consistent with current measurements.

## Contribution

It summarizes the two-families scenario and highlights how current observations support the existence of strange quark stars within this framework.

## Key findings

- Current radius estimates are compatible with the two-families scenario.
- Large-radius objects can be interpreted as strange quark stars.
- The scenario predicts specific observable signatures for future measurements.

## Abstract

We shortly summarize the two-families scenario in which both hadronic stars and strange quark stars can exist and we describe the main predictions one can obtain from it. We then concentrate on the observables that most likely will be measured in the near future, i.e. masses, radii, tidal deformabilities and moments of inertia and we present a list of objects that are candidate strange quark stars in this scheme. We show that the estimates of the radii derived up to now from observations are all compatible with the two-families scenario and in particular all the objects having large radii can easily be interpreted as strange quark stars.