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The Hertzsprung-gap giant 31 Comae in 2013: Magnetic field and activity indicators

Borisova, Ana P. ; Konstantinova-Antova, Renada ; Aurière, Michel ; Petit, Pascal ; Charbonnel, Corinne

In: Proceedings of the International Astronomical Union, 2013, vol. 9, no. S302, p. 365-366

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    Titre
    • The Hertzsprung-gap giant 31 Comae in 2013: Magnetic field and activity indicators
    Auteur
    • Borisova, Ana P.. Institute of Astronomy and NAO, Bulgarian Academy of Sciences 72 Tsarigradsko shosse blvd., BG-1784, Sofia, Bulgaria email: aborisova@astro.bas.bg
    • Konstantinova-Antova, Renada. Institute of Astronomy and NAO, Bulgarian Academy of Sciences 72 Tsarigradsko shosse blvd., BG-1784, Sofia, Bulgaria email: aborisova@astro.bas.bg
    • Aurière, Michel. Institut de Recherche en Astrophysique et Plantologie, CNRS, Universitè de Toulouse, France
    • Petit, Pascal. Institut de Recherche en Astrophysique et Plantologie, CNRS, Universitè de Toulouse, France
    • Charbonnel, Corinne. Institut de Recherche en Astrophysique et Plantologie, CNRS, Universitè de Toulouse, France
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • Proceedings of the International Astronomical Union, 2013, vol. 9, no. S302, p. 365-366. Cambridge University Press
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:294744
    Summary
    We have observed the giant star 31 Comae in April and May 2013 with the spectropolarimeter Narval at Pic du Midi Observatory, France. 31 Comae is a single, rapidly rotating giant with rotational period ~6.8 d and vsini ~ 67 km/s. We present measurements and discuss variability of the longitudinal magnetic field (Bl), spectral activity indicators Hα, CaII H&K, Ca II IR triplet and evolutionary status. Our future aim is to perform a Zeeman-Doppler imaging study for the star