Photometric information on globular cluster stars from the Palomar Sky Survey prints |
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| Authors: | V Castellani F A D'Antona R de Amicis F Smriglio |
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| Institution: | (1) Institute of Astronomy, Cambridge, England;(2) Institute of Physics, Rome University Italy, Frascati, Italy;(3) Laboratory for Space Astrophysics, Frascati, Italy;(4) Astronomical Observatory, Rome, Italy |
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| Abstract: | Photometric information that can be taken from the Palomar Sky Survey prints can be used to discriminate among the various evolutionary stages of stars that are members of globular clusters, as well as to obtain some idea of the HR diagram for vary faint stars. For a test case, it is shown that in a check analysis forM3 the known turn-off luminosity is given to within about 0.5 mag. The globular cluster NGC 5466 is examined and it is concluded that no turn-off occurs beforeP 20 mag. |
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