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Binary stars in globular clusters: detection of a binary sequence in ngc 2808?

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INSPIRE-HEP
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  • Astrophysics
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Abstract

A CCD V,V-I colour-magnitude diagram (CMD) of the Galactic globular cluster NGC 2808 has been obtained with the ESO-NTT, reaching down to V ~ 24. The highly populated Main Sequence (MS) presents a significant broadening redward to the MS ridge line, larger than expected from photometric errors alone, which could be interpreted as due to binary candidates.

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