On the Carbon-Star Status of Five Stars in a New Carbon Star Catalog

Details On the Carbon-Star Status of Five Stars in a New Carbon Star Catalog On the Carbon-Star Status of Five Stars in a New Carbon Star Catalog

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002chjaa...2..169c&link_type=abstract

Chinese Journal of Astronomy & Astrophysics, Vol. 2, p. 169-173

Astronomy and Astrophysics

Astrophysics

3

Stars: Agb, Stars: Carbon, Infrared: Stars

Scientific paper

We find that five sources listed in the new carbon star catalog are not really carbon-rich objects but oxygen-rich stars, because they all have the prominent 10μm silicate features in absorption and the 1612 MHz OH maser emission or/and the SiO molecular features. These objects were considered as carbon stars in the catalog based only on their locations in the infrared two-color diagram. Therefore to use the infrared two-color diagram to distinguish carbon-rich stars from oxygen-rich stars must be done with caution, because, in general, it has only a statistical meaning.

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