The main sequence of the globular cluster NGC 288

Details The main sequence of the globular cluster NGC 288 The main sequence of the globular cluster NGC 288

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980aj.....85.1592a&link_type=abstract

Astronomical Journal, vol. 85, Dec. 1980, p. 1592-1603.

Astronomy and Astrophysics

Astronomy

38

Astronomical Photometry, Galactic Evolution, Globular Clusters, Main Sequence Stars, Star Distribution, Astronomical Photography, Interstellar Extinction, Milky Way Galaxy, Stellar Magnitude, Tables (Data)

Scientific paper

This paper examines the photometry for 911 stars in the globular cluster NGC 288 situated less than a degree from the South Galactic Pole. The Pickering-Racine wedge is used with several telescopes to extend the photoelectric limit from V approximately 16.0 to 20.6. The position of the main sequence turn-off lies at V = 18.8 + or - 0.1 (m.e.) and B - V - 0.50 + or - 0.03 (m.e.). The cluster's age is determined at 14.5 + or - 2.5 billion years and a striking deficiency of stars over approximately 0.7 magnitude of the subgiant branch is observed.

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