Age of the Large Magellanic Cloud globular cluster NGC 2173

Journal Article · Wed Oct 01 04:00:00 EDT 1986 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/164575· OSTI ID:6635387

Mould, J R; Da costa, G S; Wieland, F P

The age of the LMC red globular cluster NGC 2173 is estimated as 1.8 + or - 0.7 billion yr by photometry of the main-sequence turnoff. The accuracy of the estimate is limited chiefly by uncertainty in the distance modulus of the cluster. At (m - M)0 = 18.2 the cluster is 2.1 + or - 0.4 Gyr; at (m = M)0 = 18.7 it is 1.4 + or - 0.3 Gyr. The transition luminosity for M stars to turn into carbon stars by the third dredge-up process is M(bol) = -4.3 + or - 0.3 mag in 2 billion year old clusters. 32 references.

• Research Organization: California Institute of Technology, Pasadena; Yale Univ. Observatory, New Haven, CT
• OSTI ID: 6635387
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 309; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AGE ESTIMATION
CARBON STARS
GALAXIES
MAGELLANIC CLOUDS
MAIN SEQUENCE STARS
PHOTOMETRY
STAR CLUSTERS
STAR EVOLUTION
STARS