Binary stars in globular clusters: detection of a binary sequence in NGC 2808? *
F.R. Ferraro 1,
E. Carretta 1,
F. Fusi Pecci 1, 2 and
A. Zamboni 1
Received 16 October 1996 / Accepted 26 June 1997
A CCD V, colour-magnitude diagram (CMD) of the Galactic globular cluster NGC 2808 has been obtained with the ESO-NTT, reaching down to .
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.
Key words: cluster: globular: NGC 2808 HR diagram Techniques: photometry, stars: Population II binaries: general
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© European Southern Observatory (ESO) 1997
Online publication: April 6, 1998