CCD stellar photometry in the central region of 47 TUC

Details CCD stellar photometry in the central region of 47 TUC CCD stellar photometry in the central region of 47 TUC

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...204..106a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 204, no. 1-2, Oct. 1988, p. 106-114.

Astronomy and Astrophysics

Astrophysics

29

Globular Clusters, Hertzsprung-Russell Diagram, Stellar Spectrophotometry, Charge Coupled Devices, Color-Magnitude Diagram, Stellar Luminosity

Scientific paper

The authors present a photometric study of more than one thousand stars in the central region of 47 Tuc. The investigation, based upon CCD observations obtained at the 1.5 m (Danish) and 2.2 m telescopes of ESO (La Silla), includes the core region and extends to about 2arcmin from the cluster centre. UBV colour-magnitude and colour-colour diagrams for stars down to 2 magnitudes below the horizontal branch are presented. The behaviour of these diagrams is found to fit well with those of the external region. The location of the horizontal branch and the luminosity function for the bright stars also agree well with those found in the external region. These results do not support previously reported colour or chemical radial gradients.

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