The Magnetic Fields at the Surface of Active Single G-K Giants

@article{Aurire2014TheMF,
  title={The Magnetic Fields at the Surface of Active Single G-K Giants},
  author={M. Auri{\`e}re and R. Konstantinova-Antova and C. Charbonnel and G. Wade and S. Tsvetkova and P. Petit and B. Dintrans and N. Drake and T. Decressin and N. Lagarde and J. Donati and T. Roudier and F. Ligni{\`e}res and K. Schroder and J. Landstreet and A. L{\`e}bre and W. Weiss and J. Zahn},
  journal={arXiv: Solar and Stellar Astrophysics},
  year={2014}
}
We investigate the magnetic field at the surface of 48 red giants selected as promising for detection of Stokes V Zeeman signatures in their spectral lines. We use the spectropolarimeters Narval and ESPaDOnS to detect circular polarization within the photospheric absorption lines of our targets and use the least-squares deconvolution (LSD) method. We also measure the classical S-index activity indicator, and the stellar radial velocity. To infer the evolutionary status of our giants and to… Expand
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