The Hertzsprung-gap giant 31 Comae in 2013: Magnetic field and activity indicators. Issue Volume 9:Issue S302(2013) (7th August 2014)

• Record Type: Journal Article
• Authors: Borisova, Ana P.; Konstantinova-Antova, Renada; Aurière, Michel; Petit, Pascal; Charbonnel, Corinne
• Editors: Petit, Pascal; Jardine, Moira; Spruit, Hendrik C.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 9:Issue S302(2013)
• Page Start: 365
• Page End: 366
• Publication Date: 2014-08-07
• Subjects: Stars: activity, -- Stars: individual: 31 Comae, -- Stars: magnetic fields; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S174392131400249X
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: 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.