Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...403..708f&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 403, no. 2, p. 708-721.
Astronomy and Astrophysics
Astrophysics
105
Chromosphere, Giant Stars, Lithium, Stellar Activity, Stellar Atmospheres, Stellar Rotation, Abundance, Radial Velocity, Stellar Cores, Stellar Motions, Stellar Spectrophotometry
Scientific paper
The rotational velocities presently obtained via spectroscopic observations of a group of moderately rapidly rotating, chomospherically active single giants indicate that Gray's (1989) rotostat hypothesis requires modification. Their rapid rotation appears to be due to high Li abundances, and results in increased chromospheric activity. A scenario is projected in which the surface convection zone reaches the rapidly rotating core just as a star begins its first ascent of the giant branch, and dredges both high angular momentum material and freshly synthesized Li to the surface.
Balachandran Suchitra
Fekel Francis C.
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