Magnetic field structure in single late-type giants: the effectively single giant V390 Aurigae

The researchers have studied the active giant V390 Aur using spectropolarimetry to obtain direct and simultaneous measurements of the magnetic field and the activity indicators to obtain a precise insight of its activity. They used the spectropolarimeter NARVAL at the Bernard Lyot Telescope (Observa...

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Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2012-05, Vol.541, p.1-1
Main Authors: Konstantinova-Antova, R, Auriere, M, Petit, P, Charbonnel, C, Tsvetkova, S, Lebre, A, Bogdanovski, R
Format: Article
Language:English
Online Access:Get full text
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Summary:The researchers have studied the active giant V390 Aur using spectropolarimetry to obtain direct and simultaneous measurements of the magnetic field and the activity indicators to obtain a precise insight of its activity. They used the spectropolarimeter NARVAL at the Bernard Lyot Telescope (Observatoire du Pic du Midi, France) to obtain a series of Stokes I and Stokes V profiles. Using the least-squares deconvolution (LSD) technique they were able to detect the Zeeman signature of the magnetic field in each of our 13 observations and to measure its longitudinal component. All these results can be explained in terms of an ... dynamo operation, taking into account the stellar structure and rotation properties of V390 Aur that they studied with up-to-date stellar models computed at solar metallicity with the code STAREVOL. The calculated Rossby number also points to a very efficient dynamo. (ProQuest: ... denotes formulae/symbols omitted.)
ISSN:0004-6361
1432-0746