New infrared carbon stars in the IRAS point source catalog.
Abstract
We present new results of a search for infrared carbon stars (IRCS) based on the combination of IRAS and near infrared colours. A sample of 207 stars with IRAS colours that characterize IRCS is selected and measured in the $JHKL$ photometric bands. Using a [12 - 25] vs. K - L colour diagram, 20 new IRCS candidates are proposed. Medium resolution spectra in the ~ 6000-9000 Angstrom range of 8 of these candidates confirm their carbon rich nature. In addition we propose a few stars with LRS class "4n" as oxygen--rich candidates, and a few stars with LRS classes "0n" and "1n" as carbon-rich. Based on observations obtained at the Observatoire de Haute Provence, France. Tables 2 and 3 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- May 1997
- DOI:
- 10.1051/aas:1997149
- Bibcode:
- 1997A&AS..122..489G
- Keywords:
-
- STARS: CARBON;
- STARS: LATE-TYPE;
- STARS: AGB AND POST-AGB;
- GALAXY: STELLAR CONTENT;
- INFRARED: STARS;
- STARS: CIRCUMSTELLAR MATTER