Magnetic Fields of Slowly Pulsating B Stars and {\beta} Cep Variables: Comparing Results from FORS1/2 and ESPaDOnS

TL;DR

This paper compares magnetic field measurements of SPB and {eta} Cep stars obtained from low-resolution FORS1/2 data and high-resolution ESPaDOnS data, addressing inconsistencies and refining magnetic models for these pulsating stars.

Contribution

It provides a detailed reanalysis and comparison of spectropolarimetric data from two different instruments, improving the reliability of magnetic field detections in these stars.

Findings

Reanalysis of archival FORS1/2 data.

Comparison reveals discrepancies between instruments.

Refined magnetic field measurements for several stars.

Abstract

Recently announced magnetic models for four SPB and {\beta} Cep stars, along with magnetic detections for two additional stars, have potentially doubled the number of known magnetic SPB and \beta Cep stars (see Grunhut et al., these proceedings). We have reanalyzed the published data and re-reduced archival low resolution spectropolarimetry collected with the FORS1/2 instruments at VLT on which the models were based, and compare them with high resolution data from the ESPaDOnS spectropolarimeter at CFHT, investigating previously noted inconsistencies between results from the two instruments.