Astron. Astrophys. Suppl. Ser.
Volume 127, Number 2, January II 1998
|Page(s)||139 - 144|
|Published online||15 January 1998|
Li-rich giants: A survey based on IRAS colours*
Universidade de São Paulo - IAG, Depto. de Astronomia, CP 3386 - 01060-970 São Paulo, Brazil
2 Observatoire de Paris-Meudon, 92195 Meudon Cedex, France
Send offprint request to: B.V. Castilho
Accepted: 24 April 1997
In a previous work we studied the IRAS colours of known Li-rich red giants and showed that they have flux ratios and 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 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.
Key words: stars: abundances / infrared: stars / stars: late type
© European Southern Observatory (ESO), 1998