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The magnetic field of the B3V star 16 Pegasi

Published online by Cambridge University Press:  01 November 2008

Huib F. Henrichs ,
C. Neiner ,
R. S. Schnerr ,
E. Verdugo ,
A. Alecian ,
C. Catala ,
F. Cochard ,
J. Gutiérrez ,
A.-L. Huat  and
J. Silvester
...Show all authors
Huib F. Henrichs
Affiliation:
Astronomical Institute, University of Amsterdam, Amsterdam, Netherlands
C. Neiner
Affiliation:
GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 92190 Meudon, France
R. S. Schnerr
Affiliation:
Inst. for Solar Physics, Royal Swedish Academy of Sciences, Stockholm, Sweden
E. Verdugo
Affiliation:
European Space Astronomy Centre (ESAC), Madrid, Spain
A. Alecian
Affiliation:
Dept. of Physics, Royal Military College of Canada, Kingston, Canada
C. Catala
Affiliation:
LESIA, Observatoire de Paris, CNRS, Université Paris Diderot, 92190 Meudon, France
F. Cochard
Affiliation:
Shelyak Instruments, Revel, France
J. Gutiérrez
Affiliation:
GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 92190 Meudon, France
A.-L. Huat
Affiliation:
GEPI, Observatoire de Paris, CNRS, Université Paris Diderot, 92190 Meudon, France
J. Silvester
Affiliation:
Dept. of Physics, Royal Military College of Canada, Kingston, Canada
O. Thizy
Affiliation:
Shelyak Instruments, Revel, France
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Abstract

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The slowly pulsating B3V star 16 Pegasi was discovered by Hubrig et al. (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 Hα in emission, there exists at present no confirmation that the star is a Be star.

Keywords

Stars: magnetic fields – techniques: polarimetric – stars: atmospheres – stars: 16 Peg – stars: early-type – stars: winds – stars: rotation – stars: pulsations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S259: Cosmic Magnetic Fields: From Planets, to Stars and Galaxies , November 2008 , pp. 393 - 394
Copyright
Copyright © International Astronomical Union 2009

References

De Cat, P., Briquet, M., Aerts, C., Goossens, K., Saesen, S., et al. 2007, A&A 463, 243Google Scholar
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Hubrig, S., Briquet, M., Schöller, M., De Cat, P., Mathys, G., & Aerts, C. 2006, MNRAS 369, L61CrossRefGoogle Scholar