The constant magnetic field of xi 1 CMa: geometry or slow rotation?

TL;DR

This study investigates whether the nearly constant magnetic field observed in xi 1 CMa is due to slow stellar rotation or specific magnetic and stellar geometry, based on five years of observational data.

Contribution

The paper analyzes long-term magnetic field measurements to distinguish between slow rotation and geometric effects as causes for the constant magnetic field in xi 1 CMa.

Findings

Magnetic field remains nearly constant over five years.

Data suggests slow rotation or specific geometry as possible explanations.

Further analysis needed to conclusively determine the cause.

Abstract

We report recent observations of the sharp-lined magnetic beta Cep pulsator xi 1 CMa (= HD 46328). The longitudinal magnetic field of this star is detected consistently, but it is not observed to vary strongly, during nearly 5 years of observation. In this poster we evaluate whether the nearly constant longitudinal field is due to intrinsically slow rotation, or rather if the stellar or magnetic geometry is responsible.