Binary stars in globular clusters: detection of a binary sequence in NGC 2808?
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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.
4 pages, Latex, uses l-aa.sty, plus 3 .ps figures, accepted by Astronomy and Astrophysics, also available at http://www.bo.astro.it/bap/BAPhome.html as bap97-20-*.ps or via anonymous ftp at ftp://boas3.bo.astro.it/bap/files/ as bap97-20-*.ps
4 pages, Latex, uses l-aa.sty, plus 3 .ps figures, accepted by Astronomy and Astrophysics, also available at http://www.bo.astro.it/bap/BAPhome.html as bap97-20-*.ps or via anonymous ftp at ftp://boas3.bo.astro.it/bap/files/ as bap97-20-*.ps