IRAS 17213-3841: Late type carbon-rich star or early type emission line star?

Details IRAS 17213-3841: Late type carbon-rich star or early type emission line star? IRAS 17213-3841: Late type carbon-rich star or early type emission line star?

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003acasn..44..350c&link_type=abstract

Acta Astronomica Sinica, vol. 44, no. 4, p. 350-354

Astronomy and Astrophysics

Astronomy

Stars: Carbon, Stars: Early-Type, Stars: Emission Line, Infrared: Stars

Scientific paper

IRAS 17213-3841 is listed as a carbon star in the new carbon star catalog. However, the IRAS low-resolution spectrum (LRS) of this star shows the oxygen-rich silicate emission feature. Furthermore, from the optical spectral observation it is shown that this star is an early type emission line star with the spectral type of O9/B0 and near the ZAMS, but not a carbon star. Therefore, it should be removed out from the carbon star catalog. In addition, the near infrared-IRAS two color diagram method which is used to identify this star as carbon star is not a perfect reliable method. Using this method to identify carbon stars must be done with caution.

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