A lack of close binaries among hot horizontal branch stars in globular clusters ⋆ M 80 and NGC 5986


Context. Recent investigations have revealed a surprising lack of close binaries among extreme horizontal branch (EHB) stars in the globular cluster NGC 6752, at variance with the analogous sdB field stars. Another puzzling result concerns the derived spectroscopic masses for some EHB stars. Aims. The present paper extends our study of NGC 6752 to M 80 and… (More)

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