The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
The O-Na and Mg-Al anticorrelations in turn-off and early subgiants in globular clusters
Open accessAbstract
High dispersion spectra () for a quite large number of stars at the main sequence turn-off and at the base of the giant branch in NGC 6397 and NGC 6752 were obtained with the UVES on Kueyen (VLT UT2). The [Fe/H] values we found are and for NGC 6397 and NGC 6752 respectively, where the first error bars refer to internal and the second ones to systematic errors (within the abundance scale defined by our analysis of 25 subdwarfs with good Hipparcos parallaxes). In both clusters the [Fe/H]'s obtained for TO-stars agree perfectly (within a few percent) with that obtained for stars at the base of the RGB. The value we obtain for NGC 6397 is quite low, but it agrees with previous results obtained for giants in this cluster. Moreover, the star-to-star scatter in both O and Fe is very small, indicating that this small mass cluster is chemically very homogenous. On the other hand, our results show clearly and for the first time that the O-Na anticorrelation (up to now seen only for stars on the red giant branches of globular clusters) is present among unevolved stars in the globular cluster NGC 6752, a more massive cluster than NGC 6397. A similar anticorrelation is present also for Mg and Al, and C and N. It is very difficult to explain the observed Na-O, and Mg-Al anticorrelation in NGC 6752 stars by a deep mixing scenario; we think it requires some non internal mechanism.
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Citations
Cites
A Catalog of Parameters for Globular Clusters in the Milky Way
Harris, W. E. (1996) · The Astronomical Journal · doi:10.1086/118116 · Cited by 4,500 · cited 2×
“NGC 6397 is a quite small cluster (mass ∼ 105 M , from the integrated magnitude MV = −6.58, Harris 1996, and a mass-to-light ratio of ∼2, typical for a globular cluster).”
BackgroundMethodInfluential
Cited by
Abundance Variations within Globular Clusters
Gratton, R., Sneden, C., & Carretta, E. (2004) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.42.053102.133945 · Cited by 885
Self-citationMiglio, A., Brogaard, K., Stello, D., Chaplin, W. J., D’Antona, F., Montalbán, J., Basu, S., Bressan, A., Grundahl, F., Pinsonneault, M., et al. (2012) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2011.19859.x · Cited by 342
Self-citationHUBBLE SPACE TELESCOPE REVEALS MULTIPLE SUB-GIANT BRANCH IN EIGHT GLOBULAR CLUSTERS
Piotto, G., Milone, A. P., Anderson, J., Bedin, L. R., Bellini, A., Cassisi, S., Marino, A. F., Aparicio, A., & Nascimbeni, V. (2012) · The Astrophysical Journal · doi:10.1088/0004-637x/760/1/39 · Cited by 152
Mg isotopic ratios in giant stars of the globular cluster NGC 6752
Yong, D., Grundahl, F., Lambert, D. L., Nissen, P. E., & Shetrone, M. D. (2003) · Astronomy & Astrophysics · doi:10.1051/0004-6361:20030296 · Cited by 149
Self-citationDEEP MIXING IN EVOLVED STARS. I. THE EFFECT OF REACTION RATE REVISIONS FROM C TO Al
Palmerini, S., La Cognata, M., Cristallo, S., & Busso, M. (2011) · The Astrophysical Journal · doi:10.1088/0004-637x/729/1/3 · Cited by 134
Metadata
- Authors
- Gratton, R. G., Bonifacio, P., Bragaglia, A., Carretta, E., Castellani, V., Centurion, M., Chieffi, A., Claudi, R., Clementini, G., D'Antona, F., Desidera, S., François, P., Grundahl, F., Lucatello, S., Molaro, P., Pasquini, L., Sneden, C., Spite, F., & Straniero, O.
- Venue
- Astronomy & Astrophysics
- Publisher
- EDP Sciences
- Published
- 2001-04
- Volume
- 369
- Issue
- 1
- Pages
- 87-98
- ISSN
- 0004-6361 (ISSN-L)
- 1432-0746
- OpenAlex
- W2115276836
- Cited by
- 526
- References
- 1
- FWCI
- 20.16
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Gratton, R. G., Bonifacio, P., Bragaglia, A., Carretta, E., Castellani, V., Centurion, M., Chieffi, A., Claudi, R., Clementini, G., D'Antona, F., Desidera, S., François, P., Grundahl, F., Lucatello, S., Molaro, P., Pasquini, L., Sneden, C., Spite, F., & Straniero, O. (2001). The O-Na and Mg-Al anticorrelations in turn-off and early subgiants in globular clusters. Astronomy & Astrophysics. https://doi.org/10.1051/0004-6361%3A20010144
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