Spin evolution of neutron stars

TL;DR

This paper reviews the magneto-rotational properties of neutron stars, focusing on their spin evolution across different stages, providing equations for spin frequency changes, and discussing uncertainties in current models.

Contribution

It offers a comprehensive overview of neutron star spin evolution, compiling and comparing various models and equations across different evolutionary phases.

Findings

Different regimes have distinct spin-up/spin-down equations.

Uncertainties remain in modeling neutron star spin behavior.

Literature suggests multiple hypotheses for spin evolution mechanisms.

Abstract

In this paper we review the basics of magneto-rotational properties of neutron stars focusing on spin-up/spin-down behavior at different evolutionary stages. The main goal is to provide equations for the spin frequency changes in various regimes (radio pulsar, propeller, accretor, etc.). Since presently spin behavior of neutron stars at all stages remains a subject of many uncertainties, we review different suggestions made over the years in the literature.