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A&A Supplement series, Vol. 127, January II 1998, 139-144

Received April 8; accepted April 24, 1997

Li-rich giants: A survey based on IRAS coloursgif

B.V. Castilho tex2html_wrap1032, J. Gregorio-Hetem tex2html_wrap1032, F. Spite tex2html_wrap1036, M. Spite tex2html_wrap1036, and B. Barbuy tex2html_wrap1032

Send offprint request: B.V. Castilho

tex2html_wrap1042  Universidade de São Paulo - IAG, Depto. de Astronomia, CP 3386 - 01060-970 São Paulo, Brazil
tex2html_wrap1044  Observatoire de Paris-Meudon, 92195 Meudon Cedex, France


In a previous work we studied the IRAS colours of known Li-rich red giants and showed that they have flux ratios F12/F25 and F25/F60 in well defined ranges. By using this result as a selection criterion, we prepared a list of 280 IRAS Point Source candidates to be Li-rich giant stars.

Up to the present we have obtained spectra for tex2html_wrap_inline1018 of our target list. We identified five stars showing a strong LiI 670.079 nm line and six ones with a Li line of medium strength. Most of the candidates show features typical of normal giants having circumstellar dust, as indicated by their IRAS colours.

keywords: stars: abundances -- infrared: stars -- stars: late type

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