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Polarized hydrogen emission lines in Mira stars: a mystery behind the shock

Published online by Cambridge University Press:  01 November 2008

Nicolas Fabas ,
Agnès Lèbre  and
Denis Gillet
Nicolas Fabas
Affiliation:
GRAAL, UMR 5024, Université Montpellier II/CNRS, France
Agnès Lèbre
Affiliation:
GRAAL, UMR 5024, Université Montpellier II/CNRS, France
Denis Gillet
Affiliation:
Observatoire de Haute-Provence, USR 2207, OAMP/CNRS, France
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Abstract

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We present a full spectropolarimetric study (in the Stokes parameters I, Q, U and V) on omicron Ceti (the prototype of Mira stars), and focus on the strong polarization detected in Balmer emission lines. This study is made with observations from NARVAL instrument at TBL (Telescope Bernard Lyot) in Pic du Midi Observatory, France.

Keywords

Shock waves – AGB and post-AGB – line: formation
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. 429 - 430
Copyright
Copyright © International Astronomical Union 2009

References

Fadeyev, Y. A. & Gillet, D. 2004, A&A 420, 423Google Scholar
McLean, I. S. & Coyne, G. V. 1978, ApJ 226, 145CrossRefGoogle Scholar