Li-rich giants: A survey based on IRAS colours

Details Li-rich giants: A survey based on IRAS colours Li-rich giants: A survey based on IRAS colours

Jan 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..127..139c&link_type=abstract

Astronomy and Astrophysics Supplement, v.127, p.139-144

Astronomy and Astrophysics

Astrophysics

14

Stars: Abundances, Infrared: Stars, Stars: Late Type

Scientific paper

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 57% 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. Observations collected at the Laboratorio Nacional de Astrofisica - LNA, Brazil; Observatoire de Haute Provence - OHP, France; European Southern Observatory - ESO, Chile.

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