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Title:
The Chemical Composition of the Field Zero-Age Star HD 77407
Authors:
Zhu, Xue-Liang; Shi, Jian-Rong; Zhao, Gang; Li, Ji; Nie, Qing-Xiang
Affiliation:
AA(College of Physics and Electronics, Shandong Normal University, Jinan 250014; National Astronomical Observatoires, Chinese Academy of Sciences, Beijing 100012), AB(National Astronomical Observatoires, Chinese Academy of Sciences, Beijing 100012), AC(National Astronomical Observatoires, Chinese Academy of Sciences, Beijing 100012), AD(National Astronomical Observatoires, Chinese Academy of Sciences, Beijing 100012; Department of Physics, Hebei Normal University, Shijiazhuang 050016), AE(College of Physics and Electronics, Shandong Normal University, Jinan 250014)
Publication:
Chinese Journal of Astronomy and Astrophysics, Volume 7, Issue 3, pp. 405-414 (2007).
Publication Date:
06/2007
Origin:
IOP
DOI:
10.1088/1009-9271/7/3/10
Bibliographic Code:
2007ChJAA...7..405Z

Abstract

High-resolution optical spectra of the zero age star HD77407 are analysed and its Li, C, O, Na, Mg, Al, Si, K, Ca, Sc, Ti, V, Co, Ni and Ba contents are determined using spectral synthesis method. The temperature of the star is determined by fitting the Hα line wings. The parameters derived for this star are Teff=5900 K, log g=4.47 and [Fe/H] = +0.07. It is found that the derived iron content is slightly higher than what is given in the published literature. This star shows a relative overabundances of Ca and Ba, and underabundances of Na, V and Ni with respect to the solar mix. Activity of the star is indicated by the filled in Hα and CaII triplet line cores. It has been confirmed that our spectroscopic approach yields fairly reliable and consistent results for active stars.

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