Correlated cyanogen and sodium anomalies in the globular clusters 47 Tuc and NGC 6752

Journal Article · Tue Apr 14 23:00:00 EST 1981 · Astrophys. J., Lett. Ed.; (United States)

DOI:https://doi.org/10.1086/183527· OSTI ID:6451896

Cottrell, P L; Da Costa, G S

Spectroscopic analyses have been made of echelle plates of pairs of CN-strong and CN-weak giants in the globular clusters 47 Tuc and NGC 6752. Our differential analysis reveals that in NGC 6752 sodium and aluminum are enhanced in the CN-strong stars by approximately 0.5 dex and 0.2 dex, respectively. All other elements studied (Mg, Si, Ca, Fe, and Ba) appear to have identical abundances in the two groups of stars. In 47 Tuc, only sodium shows any enhancement (by approx.0.4 dex) in the CN-strong stars.

• Research Organization: Department of Astronomy and McDonald Observatory, The University of Texas at Austin
• OSTI ID: 6451896
• Journal Information: Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 245:2; ISSN AJLEA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ALKALI METALS
ALUMINIUM
CHEMICAL COMPOSITION
COSMIC GASES
CYANOGEN
ELEMENTS
FLUIDS
GASES
GIANT STARS
METALS
NUCLEOSYNTHESIS
SODIUM
SPECTROSCOPY
STAR CLUSTERS
STAR EVOLUTION
STARS
VARIATIONS