# Rotational Evolution of The Slowest Radio Pulsar PSR J0250+5854

## TL;DR

This paper models the spin-down evolution of the slowest radio pulsar, PSR J0250+5854, suggesting it may have a high magnetic field and a possible link to magnetars, depending on magnetic decay and inclination angle.

## Contribution

It introduces a theoretical framework applying magnetospheric evolution and magnetic decay models to understand the pulsar's evolution and magnetic properties.

## Key findings

- PSR J0250+5854 may have a magnetic field comparable to magnetars.
- Long-period pulsars tend to have low period derivatives.
- Possible evolutionary connection to high magnetic field magnetars.

## Abstract

We apply theoretical spin-down models of magnetospheric evolution and magnetic field decay to simulate the possible evolution of PSR J0250+5854, which is the slowest-spinning radio pulsar detected to date. Considering the alignment of inclination angle in a 3-D magnetosphere, it is possible that PSR J0250+5854 has a high magnetic field comparable with magnetars or/and high magnetic field pulsars, if a small inclination angle is considered. Our calculations show that similar long-period pulsars tend to have a relatively low period derivative in this case. In another case of magnetic field decay, calculations also show a possible connection between PSR J0250+5854 and high dipole-magnetic field magnetars. The evolutionary path indicates a relatively high spin-down rate for similar long-period pulsars.