An analysis of the magnetic field geometry and its interaction with the circumstellar environment of HD 57682 by the MiMeS Collaboration

TL;DR

This paper analyzes the magnetic field geometry of the O9IV star HD 57682, examining its interaction with the circumstellar environment through spectropolarimetric data and variability studies.

Contribution

It presents a detailed analysis of HD 57682's magnetic properties, including its rotational period and magnetic field geometry, based on extensive spectropolarimetric observations.

Findings

Determined the star's rotational period from magnetic and H_alpha variability.

Mapped the magnetic field geometry of HD 57682.

Explored the influence of magnetic fields on the circumstellar environment.

Abstract

We will review our recent analysis of the magnetic properties of the O9IV star HD 57682, using spectropolarimetric observations obtained with ESPaDOnS at the Canada-France-Hawaii telescope within the context of the Magnetism in Massive Stars (MiMeS) Large Program. We discuss our most recent determination of the rotational period from longitudinal magnetic field measurements and H_alpha variability - the latter obtained from over a decade's worth of professional and amateur spectroscopic observations. Lastly, we report on our investigation of the magnetic field geometry and the effects of the field on the circumstellar environment.