The age of the Large Magellanic Cloud globular cluster NGC 2173

Details The age of the Large Magellanic Cloud globular cluster NGC 2173 The age of the Large Magellanic Cloud globular cluster NGC 2173

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...309...39m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 309, Oct. 1, 1986, p. 39-44.

Astronomy and Astrophysics

Astrophysics

23

Color-Magnitude Diagram, Globular Clusters, Magellanic Clouds, Main Sequence Stars, Stellar Evolution, Carbon Stars, M Stars

Scientific paper

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.

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