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The chemical composition of red giants in 47 Tucanae II. Magnesium isotopes and pollution scenarios
| Indexado |
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| DOI | 10.1051/0004-6361/201526643 | ||||
| Año | 2016 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Abstract
Conclusions. We confirm the results seen from other globular clusters, where no strong variation in the isotopic ratios is observed between stellar populations, for observed ranges in [Al/Fe]. We see no evidence for any significant activation of the Mg-Al burning chain. The use of 3D atmospheres causes an increase of a factor of up to 2.5 in the fraction of Mg-25, resolving part of the discrepancy between the observed isotopic fraction and the predictions from pollution models.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Thygesen, Anders O. | Hombre |
Heidelberg Univ - Alemania
CALTECH - Estados Unidos Landessternwarte Heidelberg - Alemania California Institute of Technology - Estados Unidos |
| 2 | Sbordone, L. | Hombre |
Heidelberg Univ - Alemania
Instituto Milenio de Astrofísica - Chile Pontificia Universidad Católica de Chile - Chile Landessternwarte Heidelberg - Alemania |
| 3 | Ludwig, H. -g. | Hombre |
Heidelberg Univ - Alemania
Landessternwarte Heidelberg - Alemania |
| 4 | Ventura, Paolo | Hombre |
Istituto Nazionale di Astrofisica - Italia
Osservatorio Astronomico di Roma - Italia Osservatorio Astronomico di Padova - Italia |
| 5 | Yong, D. | Hombre |
Australian Natl Univ - Australia
Australian National University - Australia The Australian National University - Australia |
| 6 | Collet, R. | - |
Australian Natl Univ - Australia
Australian National University - Australia The Australian National University - Australia |
| 7 | Christlieb, N. | Hombre |
Heidelberg Univ - Alemania
Landessternwarte Heidelberg - Alemania |
| 8 | Melendez, J. | Hombre |
UNIV SAO PAULO - Brasil
Universidade de Sao Paulo - USP - Brasil Universidade de São Paulo - Brasil |
| 9 | Zaggia, Simone | Mujer |
Istituto Nazionale di Astrofisica - Italia
Osservatorio Astronomico di Padova - Italia |
| Fuente |
|---|
| German Research Foundation (DFG) |
| Australian Research Council Future Fellowship |
| Chile's Ministry of Economy, Development, and Tourism's Millennium Science Initiative |
| DECRA grant from Australian Research Council |
| Agradecimiento |
|---|
| The authors would like to thank the anonymous referee for their useful comments which helped improve the manuscript. A.O.T., L.S., H.G.L. and N.C. acknowledges support from Sonderforschungsbereich SFB 881 "The Milky Way System" (subprojects A4 and A5) of the German Research Foundation (DFG). LS acknowledges the support by Chile's Ministry of Economy, Development, and Tourism's Millennium Science Initiative through grant IC120009, awarded to The Millennium Institute of Astrophysics, MAS. D.Y. was supported through an Australian Research Council Future Fellowship (FT140100554). R.C. acknowledges support from a DECRA grant from the Australian Research Council (project DE120102940). This work has made use of the VALD database, operated at Uppsala University, the Institute of Astronomy RAS in Moscow, and the University of Vienna. This research took advantage of the SIMBAD and VIZIER databases at the CDS, Strasbourg (France), and NASA's Astrophysics Data System Bibliographic Services. |
