Recognition and classification of strong-CN giants

Details Recognition and classification of strong-CN giants Recognition and classification of strong-CN giants

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pasp...99..629k&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 99, July 1987, p. 629-636.

Astronomy and Astrophysics

Astronomy

10

Giant Stars, Metallic Stars, Solar Neighborhood, Stellar Composition, Stellar Luminosity, Carbon Stars, Metallicity, Nitrogen

Scientific paper

Fifty of the stars designated as super-metal-rich by Spinrad and Taylor (1969) are classified here on the Revised MK System. Positive CN indices are assigned in recognition of the characteristic excesses of carbon and nitrogen in their atmospheres, as compared to normal Population I stars. For only a few of the stars, an abnormal strength of the iron lines or of Ca 4226 A is so noticeable that they need to be distinguished by positive indices for these metals.

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