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A contribution of 26Al to the O-Al anticorrelation in globular cluster red giants | | Pavel A. Denissenkov
; Achim Weiss
; | | Date: |
11 Jul 2001 | | Subject: | astro-ph | | Affiliation: | 1,2) and Achim Weiss ( Sobolev Astronomical Institute, St. Petersburg University, St. Petersburg; Max-Planck-Institute for Astrophysics, Garching | | Abstract: | We modify our combined ("deep mixing" plus "primordial") scenario explaining the star-to-star abundance variations in globular cluster red giants in such a way that it confirms with new experimental data: (i) the new and better constrained (NACRE) thermonuclear reaction rates and (ii) a discovery of the O-Na anticorrelation in stars below the main-sequence turn-off in the cluster NGC6752. For the latter we propose that some main-sequence dwarfs in globular clusters accrete material lost by red giant primary components of close binaries during a common envelope event. As a consequence of the new reaction rates, we are drawn to the conclusion that the anomalies in [Al/Fe] in globular cluster red giants are in fact manifestations of 26Al (instead of the stable isotope 27Al) abundance variations produced by deep mixing. | | Source: | arXiv, astro-ph/0107190 | | Services: | Forum | Review | PDF | Favorites | |
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