Blue straggler stars in the globular cluster NGC 5053

Details Blue straggler stars in the globular cluster NGC 5053 Blue straggler stars in the globular cluster NGC 5053

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...336..780n&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 336, Jan. 15, 1989, p. 780-797. Research supported by the California Instit

Astronomy and Astrophysics

Astrophysics

86

Binary Stars, Blue Stars, Globular Clusters, Stellar Spectrophotometry, Abundance, Charge Coupled Devices, Color-Magnitude Diagram, Stellar Evolution, Stellar Luminosity, Stellar Magnitude

Scientific paper

A study of the low central concentration globular cluster NGC 5053 based on photometry to 23 mag is reported. Deep C-M diagrams are presented, a mean metal abundance for the cluster is derived from the color of the RGB at the level of the horizontal branch, and theoretical isochrones are used to derive a distance modulus of (m - M0) = 16.05 + or - 0.14 mag and an age of 18 + or - 3 Gyr. A luminosity function based on subgiant and upper main-sequence stars is also constructed. A total of 24 blue stragglers in NGC 5053 are identified and their properties are studied.

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