Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...350..859s&link_type=abstract
Astronomy and Astrophysics, v.350, p.859-864 (1999)
Astronomy and Astrophysics
Astrophysics
8
Stars: Abundances, Stars: Fundamental Parameters, Stars: Individual: Gamma Tau, Stars: Individual: Epsilon Tau, Stars: Late-Type
Scientific paper
Spectra of the Hyades K0 giants gamma Tau and epsilon Tau in the regions 5852-5864 Ä,and 6145-6176 Ä,have been recorded at high resolution and with signal/noise in the range 150-250. A critical comparison reveals that, although nearly all lines in the observed regions have a similar depth, lines of epsilon Tau are broader by about 10% than those of gamma Tau. An LTE analysis indicates that slightly higher turbulent broadening in epsilon Tau can account for the observed differences in line-width. Study of two particularly temperature sensitive features confirms earlier observations that the effective temperature of epsilon Tau is less than that of gamma Tau and determines the temperature difference to be 80 +/- 20 K.
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