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Iron Lines and Surface Gravity Determination for τ Ceti

Published online by Cambridge University Press:  19 July 2016

S. Arribas  and
C. Martinez Roger
S. Arribas
Affiliation:
Instituto de Astrofisica de Canarias, 38200 - La Laguna, Tenerife, Spain.
C. Martinez Roger
Affiliation:
Instituto de Astrofisica de Canarias, 38200 - La Laguna, Tenerife, Spain.

Abstract

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We present a spectroscopic analysis for the gravity determination of τ Ceti on the basis of a new and high quality set of data. The iron lines are studied by using the Oxford oscillator strengths. The results are compared with those obtained with “solar” oscillator strengths. Non-LTE effects seem to be important in this star. The Fel at λ 526.955 nm line is used to apply the Blackwell and Willis (1977) method to determine the surface gravity. The derived log g is 4.70±0.1.

Type
VI. Chemical Composition of Stars
Information
Symposium - International Astronomical Union , Volume 132: The Impact of Veryhigh S/N Spectroscopy on Stellar Physics , 1988 , pp. 445 - 448
Copyright
Copyright © Kluwer 1988 

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