1. Descendants of Magnetic and non-Magnetic A-type Stars
- Author
-
Aurière, M., Lignières, F., Konstantinova-Antova, R., Charbonnel, C., Pascal Petit, Tsvetkova, S., and Wade, G.
- Subjects
Astrophysics - Solar and Stellar Astrophysics ,Astrophysics::Solar and Stellar Astrophysics ,FOS: Physical sciences ,Astrophysics::Earth and Planetary Astrophysics ,Astrophysics::Galaxy Astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) - Abstract
We have studied the magnetic field of about 50 active and non-active single G-K-type red giants by means of spectropolarimetry with Narval and ESPaDOnS. 30 giants have been significantly Zeeman-detected. A close study of the 17 giants with known rotational periods shows that the measured magnetic field strength is correlated to the rotation, in particular to the Rossby number. 4 giants for which the magnetic field is measured to be outstandingly strong with respect to the rotational period or the evolutionary state are identified as probable Ap-star descendants. We detail their magnetic properties and propose criteria to identify Ap-star descendants., Comment: 8 pages, to appear in the proceedings of the conference "Putting A Stars into Context: Evolution, Environment, and Related Stars"
- Published
- 2013
- Full Text
- View/download PDF