The magnetic field of the B3V star 16 Pegasi
H.F. Henrichs, C. Neiner, R.S. Schnerr, E. Verdugo, A. Alecian, C., Catala, F. Cochard, J. Guti\'errez, A.-L. Huat, J. Silvester, O. Thizy
TL;DR
This study confirms the magnetic nature of the B3V star 16 Pegasi using new spectropolarimetric data, identifies a potential magnetic modulation period, and clarifies the star's spectral characteristics.
Contribution
The paper provides new spectropolarimetric measurements confirming 16 Pegasi's magnetic field and refines its potential magnetic modulation period.
Findings
Magnetic field confirmed in 16 Pegasi
Possible magnetic modulation period of about 1.44 days
No evidence of UV wind line variability or Be star characteristics
Abstract
The Slowly Pulsating B3V star 16 Pegasi was discovered by Hubrig (2006) to be magnetic, based on low-resolution spectropolarimetric observations with FORS1 at the VLT. We have confirmed the presence of a magnetic field with new measurements with the spectropolarimeters Narval at TBL, France and Espadons at CFHT, Hawaii during 2007. The most likely period is about 1.44 d for the modulation of the field, but this could not be firmly established with the available data set. No variability has been found in the UV stellar wind lines. Although the star was reported once to show H alpha in emission, there exists at present no confirmation that the star is a Be star.
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