Release 11.12 ("Hergest Ridge")
Release 11.12 ("Hergest Ridge")
| Article ID: gc534 | |
| Author | Moni Bidin, C.; Moehler, S.; Piotto, G.; Momany, Y.; Recio-Blanco, A. |
| Title | A lack of close binaries among hot horizontal branch stars in globular clusters. M 80 and NGC 5986 |
| Journal | Astronomy and Astrophysics, Volume 498, Issue 3, 2009, pp.737-751 |
| Year of publication | 2009 (on gclusters from 2017-05-24 10:47:07 ) |
| Abstract | 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. The present paper extends our study of NGC 6752 to M 80 and NGC 5986, to establish whether the unexpected properties of EHB stars in NGC 6752 are also present in other clusters (...) Our results show that the deficiency of close binaries among EHB stars is now confirmed in two, and possibly three, globular clusters. This feature is therefore not a peculiarity of NGC 6752. Our analysis also proves that the strangely high spectroscopic masses among EHB stars are now confirmed in at least a second cluster... |
| Tags | NGC 5986 |
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