F. Guglielmo et al., NEW INFRARED CARBON STARS IN THE IRAS POINT-SOURCE CATALOG, Astronomy & Astrophysics. Supplement series, 122(3), 1997, pp. 489-494
We present new results of a search for infrared carbon stars (IRCS) ba
sed on the combination of IRAS and near infrared colours. A sample of
207 stars with IRAS colours that characterize IRCS is selected and mea
sured in the JHKL photometric bands. Using a [12 -25] vs. K - L colour
diagram, 20 new IRCS candidates are proposed. Medium resolution spect
ra in the similar to 6000 - 9000 Angstrom range of 8 of these candidat
es confirm their carbon rich nature. In addition we propose a few star
s with LRS class; ''4n'' as oxygen-rich candidates, and a few stars Wi
th LRS classes ''0n'' and ''1n'' as carbon-rich.