# The early life of millisecond magnetars

## TL;DR

This paper investigates the early evolution of millisecond magnetars, focusing on how viscous dissipation and electromagnetic torques influence the alignment of magnetic and spin axes, which impacts gravitational wave and electromagnetic emissions.

## Contribution

It introduces a combined model considering both viscous dissipation and electromagnetic torques affecting magnetic axis evolution in young millisecond magnetars.

## Key findings

- Viscous dissipation tends to orthogonalize magnetic and spin axes.
- Electromagnetic torques promote alignment of the axes.
- An interplay exists between these effects influencing the star's evolution.

## Abstract

Some neutron stars may be born spinning fast and with strong magnetic fields---the so-called \emph{millisecond magnetars}. It is important to understand how a star's magnetic axis moves with respect to the spin axis in the star's early life, as this effects both electromagnetic and gravitational wave emission. Previous studies have highlighted the importance of viscous dissipation within the star in this process. We advance this program by additionally considering the effect of the electromagnetic torque. We find an interesting interplay between the viscous dissipation, which makes the magnetic axis orthogonalise with respect to the spin, verses magnetic torques that tend to make the magnetic axis align with the spin axis. We present some results, and highlight areas where our model needs to be made more realistic.