A Contribution of [TSUP]26[/TSUP]A[CLC]l[/CLC] to the O-A[CLC]l[/CLC] Anticorrelation in Globular Cluster Red Giants | Zendy

Pavel A. Denissenkov | Zendy; Achim Weiß | Zendy

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A Contribution of [TSUP]26[/TSUP]A[CLC]l[/CLC] to the O-A[CLC]l[/CLC] Anticorrelation in Globular Cluster Red Giants

Author(s) -

Pavel A. Denissenkov,

Achim Weiß

Publication year - 2001

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/323789

Subject(s) - globular cluster , physics , astrophysics , red giant branch , asymptotic giant branch , red giant , stars , mixing (physics) , thermonuclear fusion , giant star , astronomy , nuclear physics , plasma , quantum mechanics

We modify our combined ("deep mixing" plus "primordial") scenario explainingthe star-to-star abundance variations in globular cluster red giants in such away that it confirms with new experimental data: (i) the new and betterconstrained (NACRE) thermonuclear reaction rates and (ii) a discovery of theO-Na anticorrelation in stars below the main-sequence turn-off in the clusterNGC6752. For the latter we propose that some main-sequence dwarfs in globularclusters accrete material lost by red giant primary components of closebinaries during a common envelope event. As a consequence of the new reactionrates, we are drawn to the conclusion that the anomalies in [Al/Fe] in globularcluster red giants are in fact manifestations of 26Al (instead of the stableisotope 27Al) abundance variations produced by deep mixing.Comment: submitted to ApJ Letter

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