The H behavior in bright giant stars *
A. Lèbre 1 and
J.R. De Medeiros 2
Received 12 June 1995 / Accepted 3 October 1996
We report high resolution spectroscopic observations of the H line profile for a sample of 32 bright giant stars with spectral type between F3 II and G5 II. By studying the link between the H behavior and the stellar rotation in such class of luminosity we have found no clear evidence that the rotational discontinuity established around F9 II is related with the H profiles. No emission features, neither time variations or asymmetries on the H line profiles have been detected for the bright giants analysed in the present work.
Key words: stars: chromospheres stars: atmospheres stars: activity stars: rotation lines: profiles.
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© European Southern Observatory (ESO) 1997
Online publication: June 30, 1998