A different view on light-element anticorrelations in globular clusters: fluorine abundances

V. D'Orazi; S. Lucatello; M. Lugaro; R. Gratton; G. Angelou; A. Bragaglia; E. Carretta; A. Alves-Brito; I. Ivans; T. Masseron; A. Mucciarelli

A different view on light-element anticorrelations in globular clusters: fluorine abundances

V. D'Orazi, S. Lucatello, M. Lugaro, R. Gratton, G. Angelou, A. Bragaglia, E. Carretta, A. Alves-Brito, I. Ivans, T. Masseron, A. Mucciarelli

Research output: Contribution to journal › Article › peer-review

Abstract

The light-element variations among globular cluster (GC) stars are nowadays accepted as the signature of self-enrichment from previous generations of stars. It is expected that these extinct progenitors experienced hot H-burning and, as fluorine is involved in the complete CNO cycle, the F abundance in GCs can provide new clues about the previous generation(s). Along with Na-O and Mg-Al anti-correlations, theory predicts an anti-correlation between F and Na and a positive correlation between F and O. Moreover, relatively low-mass AGB stars are F producers (and are also responsible for C+N+O and s-process element variations). We present our results on F abundances in four GCs (NGC 6656, NGC 6752, 47 Tucanae and omega Centauri), which exhibit notably different s-process and/or C+N+O abundance patterns.

Original language	English
Pages (from-to)	34-37
Number of pages	4
Journal	Memorie della Società Astronomica Italiana = Journal of the Italian Astronomical Society
Volume	84
Issue number	1
Publication status	Published - 2013

Keywords

stars: abundances
stars: Population II
galaxy: globular clusters
stars: AGB and post-AGB

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http://sait.oat.ts.astro.it/MSAIt840113/

Cite this

D'Orazi, V., Lucatello, S., Lugaro, M., Gratton, R., Angelou, G., Bragaglia, A., Carretta, E., Alves-Brito, A., Ivans, I., Masseron, T., & Mucciarelli, A. (2013). A different view on light-element anticorrelations in globular clusters: fluorine abundances. Memorie della Società Astronomica Italiana = Journal of the Italian Astronomical Society, 84(1), 34-37. http://sait.oat.ts.astro.it/MSAIt840113/

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title = "A different view on light-element anticorrelations in globular clusters: fluorine abundances",

abstract = "The light-element variations among globular cluster (GC) stars are nowadays accepted as the signature of self-enrichment from previous generations of stars. It is expected that these extinct progenitors experienced hot H-burning and, as fluorine is involved in the complete CNO cycle, the F abundance in GCs can provide new clues about the previous generation(s). Along with Na-O and Mg-Al anti-correlations, theory predicts an anti-correlation between F and Na and a positive correlation between F and O. Moreover, relatively low-mass AGB stars are F producers (and are also responsible for C+N+O and s-process element variations). We present our results on F abundances in four GCs (NGC 6656, NGC 6752, 47 Tucanae and omega Centauri), which exhibit notably different s-process and/or C+N+O abundance patterns.",

keywords = "stars: abundances, stars: Population II, galaxy: globular clusters, stars: AGB and post-AGB",

author = "V. D'Orazi and S. Lucatello and M. Lugaro and R. Gratton and G. Angelou and A. Bragaglia and E. Carretta and A. Alves-Brito and I. Ivans and T. Masseron and A. Mucciarelli",

year = "2013",

language = "English",

volume = "84",

pages = "34--37",

journal = "Memorie della Societ{\`a} Astronomica Italiana = Journal of the Italian Astronomical Society",

issn = "1824-016X",

publisher = "Societa Astronomica Italiana",

number = "1",

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D'Orazi, V, Lucatello, S, Lugaro, M, Gratton, R, Angelou, G, Bragaglia, A, Carretta, E, Alves-Brito, A, Ivans, I, Masseron, T & Mucciarelli, A 2013, 'A different view on light-element anticorrelations in globular clusters: fluorine abundances', Memorie della Società Astronomica Italiana = Journal of the Italian Astronomical Society, vol. 84, no. 1, pp. 34-37. <http://sait.oat.ts.astro.it/MSAIt840113/>

TY - JOUR

T1 - A different view on light-element anticorrelations in globular clusters

T2 - fluorine abundances

AU - D'Orazi, V.

AU - Lucatello, S.

AU - Lugaro, M.

AU - Gratton, R.

AU - Angelou, G.

AU - Bragaglia, A.

AU - Carretta, E.

AU - Alves-Brito, A.

AU - Ivans, I.

AU - Masseron, T.

AU - Mucciarelli, A.

PY - 2013

Y1 - 2013

N2 - The light-element variations among globular cluster (GC) stars are nowadays accepted as the signature of self-enrichment from previous generations of stars. It is expected that these extinct progenitors experienced hot H-burning and, as fluorine is involved in the complete CNO cycle, the F abundance in GCs can provide new clues about the previous generation(s). Along with Na-O and Mg-Al anti-correlations, theory predicts an anti-correlation between F and Na and a positive correlation between F and O. Moreover, relatively low-mass AGB stars are F producers (and are also responsible for C+N+O and s-process element variations). We present our results on F abundances in four GCs (NGC 6656, NGC 6752, 47 Tucanae and omega Centauri), which exhibit notably different s-process and/or C+N+O abundance patterns.

AB - The light-element variations among globular cluster (GC) stars are nowadays accepted as the signature of self-enrichment from previous generations of stars. It is expected that these extinct progenitors experienced hot H-burning and, as fluorine is involved in the complete CNO cycle, the F abundance in GCs can provide new clues about the previous generation(s). Along with Na-O and Mg-Al anti-correlations, theory predicts an anti-correlation between F and Na and a positive correlation between F and O. Moreover, relatively low-mass AGB stars are F producers (and are also responsible for C+N+O and s-process element variations). We present our results on F abundances in four GCs (NGC 6656, NGC 6752, 47 Tucanae and omega Centauri), which exhibit notably different s-process and/or C+N+O abundance patterns.

KW - stars: abundances

KW - stars: Population II

KW - galaxy: globular clusters

KW - stars: AGB and post-AGB

M3 - Article

SN - 1824-016X

VL - 84

SP - 34

EP - 37

JO - Memorie della Società Astronomica Italiana = Journal of the Italian Astronomical Society

JF - Memorie della Società Astronomica Italiana = Journal of the Italian Astronomical Society

IS - 1

ER -

A different view on light-element anticorrelations in globular clusters: fluorine abundances

Abstract

Keywords

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