Bibcode
Arribas, S.; Crivellari, L.
Bibliographical reference
Astronomy and Astrophysics (ISSN 0004-6361), vol. 210, no. 1-2, Feb. 1989, p. 211-224.
Advertised on:
2
1989
Citations
14
Refereed citations
14
Description
The physical parameters of Tau Cet are analyzed based on new and
high-quality data. The effective temperature is determined to be 5250 +
or - 50 K. The discrepancy of the abundance inferred from the Fe I lines
with the lowest excitation cannot be explained by errors either in
atomic or stellar parameters and implies the need for models
incorporating non-LTE and/or a more reliable UV opacity. The obtained
abundances for the alpha-particle elements exceed that of the Fe group
by 0.2 dex, in complete agreement with previous results for metal-poor
dwarfs of the Galactic disk population. The microturbulence value is
found to be 1.1 + or - 0.1 km/s. The surface gravity value is determined
to be 1.0 + or - 0.3 solar mass.