Abstract
view Abstract Citations (32) References (82) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS CN and CH Variations among Giants in the Globular Cluster M2 Smith, Graeme H. ; Mateo, Mario Abstract A spectroscopic survey has been made of the distribution of 3883 CN and 4300 CH band strengths among a sample of red giants in the globular cluster M2 (NGC 7089). The data are consistent with the majority of giants following a bimodal distribution of CN strengths, with the CN-strong giants exhibiting weaker CH bands than the CN-weak giants of comparable magnitude. However, two stars in the present sample appear to be CH stars, one of which was discovered previously by Zinn. Consequently, M2 provides the only known example of a cluster in which both bimodal CN distributions and CH stars exist. Publication: The Astrophysical Journal Pub Date: April 1990 DOI: 10.1086/168641 Bibcode: 1990ApJ...353..533S Keywords: Cyano Compounds; Globular Clusters; Hydrocarbons; Red Giant Stars; Stellar Composition; Late Stars; Metallicity; Stellar Spectra; Astrophysics; CLUSTERS: GLOBULAR; STARS: ABUNDANCES; STARS: LATE-TYPE full text sources ADS | data products SIMBAD (36)
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