Crust (Unified) Tool for Equation-of-state Reconstruction (CUTER) v2

TL;DR

CUTER v2 is a numerical tool that enables consistent matching of crust and core equations of state for neutron stars, improving the accuracy of global property calculations.

Contribution

This paper introduces the second version of CUTER, a tool for unified crust and core EoS matching, validated for astrophysical applications.

Findings

Efficiently reconstructs neutron star crusts and outer crusts.

Allows consistent calculation of neutron star global properties.

Validated for use by the astrophysical community.

Abstract

The equation of state (EoS) is a needed input to determine the neutron-star global properties and to relate them. It is thus important to provide consistent and unified EoSs to avoid possible biases in the analyses coming from the use of inconsistent EoSs. We propose a numerical tool, CUTER, allowing the user to consistently match a nuclear-physics informed crust to an arbitrary higher density EoS. We present here the second version of this tool, CUTER v2. Two functionalities are available with the CUTER v2 tool, allowing the user to reconstruct either the whole (outer and inner) crust, or the outer crust only. We show that the code, that has been tested and validated for use by the astrophysical community, is able to efficiently perform both tasks, allowing the computation of neutron-star global properties in a consistent way.