Cu i resonance lines in turn-off stars of NGC 6752 and NGC 6397⋆

Author： Bonifacio P.   Caffau E.   Ludwig H.-G.  

Publisher： Edp Sciences

E-ISSN： 1432-0746|524|issue|A96-A96

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.524, Iss.issue, 2010-11, pp. : A96-A96

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Context. Copper is an element whose interesting evolution with metallicity is not fully understood. Observations of copper abundances rely on a very limited number of lines, the strongest are the Cu i lines of Mult. 1 at 324.7 nm and 327.3 nm which can be measured even at extremely low metallicities.

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