Cyanogen distribution and NGC 3201, M55, and M71

Journal Article · Mon Mar 01 04:00:00 EST 1982 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/159718· OSTI ID:5170272

Smith, G H; Norris, J

Observations have been made of the cyanogen distributions in the globular clusters NGC 3201, M55, and M71. The latter two clusters were chosen for study because they have heavy element abundances similar to those of ..omega.. Cen and 47 Tuc, respectively, but considerably smaller masses. No cyanogen enhancements (apart from one CH star) were detected in M55, in marked contrast to the inhomogeneities seen in ..omega.. Cen. On the other hand, M71 was found to have a range in cyanogen strength very similar to that seen in 47 Tuc. For NGC 3201 we find a bimodal cyanogen distribution, though the difference between the CN-weak and CN-strong stars is not as marked as that found in NGC 6752 and M4 (which have a heavy element abundance similar to that of NGC 3201).

• Research Organization: Mount Stromolo and Siding Spring Observatories, Research School of Physical Sciences, Australian National University
• OSTI ID: 5170272
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 254:1; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CARBON
CHEMICAL COMPOSITION
CYANOGEN
DISTRIBUTION
ELEMENTS
MAIN SEQUENCE STARS
MASS
NITROGEN
NONMETALS
SPATIAL DISTRIBUTION
SPECTRA
STAR CLUSTERS
STARS
VARIATIONS
VISIBLE SPECTRA