The age of the globular cluster NGC 288

Details The age of the globular cluster NGC 288 The age of the globular cluster NGC 288

Jun 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.208..559p&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 208, June 1, 1984, p. 559-574.

Astronomy and Astrophysics

Astronomy

15

Astronomical Photometry, Globular Clusters, Metallicity, Stellar Evolution, Chronology, Color-Magnitude Diagram, Main Sequence Stars, Space Density

Scientific paper

Electronographic BV photometry of NGC 288 has been obtained, giving the colour-magnitude diagram down to V = 21.0, two magnitudes below the turn-off point. The main sequence is bluer than has been found in previous work and lies close to the position expected for a normal globular cluster. Adopting externally derived values for the metallicity, distance modulus and reddening, the VandenBerg theoretical isochrone for an age of between 16 and 17 Gyr fits well. The problems in an accurate age determination are discussed.

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