HD 232 862 : a magnetic and lithium-rich giant star

Details HD 232 862 : a magnetic and lithium-rich giant star HD 232 862 : a magnetic and lithium-rich giant star

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010iaus..268..347p&link_type=abstract

Light Elements in the Universe, Proceedings of the International Astronomical Union, IAU Symposium, Volume 268, p. 347-348

Astronomy and Astrophysics

Astronomy

1

Stars: Spectroscopy, Spectropolarimetry, Abundances, Evolution, Magnetic Fields

Scientific paper

Using spectropolarimetric data acquired with the ESPaDOnS and NARVAL instruments at CFHT and at TBL, we present a detailed spectral synthesis analysis of HD 232 862, a field giant classified as a G8II star hosting a magnetic field. This star is the first lithium-rich field giant hosting a magnetic field. Stellar evolution models suggest that HD 232 862 should be a 1.5 to 2.0 M&sun; star at the bottom of the red giant branch. Its unsually high lithium content (A(Li) = 2.45 ± 0.25 dex) is even more puzzling and challenges our understanding of the evolution of this star.

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