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Frank Grundahl

Sodium content as a predictor of the advanced evolution of globular cluster stars

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Standard

Sodium content as a predictor of the advanced evolution of globular cluster stars. / Campbell, Simon W.; D'Orazi, Valentina; Yong, David; Constantino, Thomas N.; Lattanzio, John C.; Stancliffe, Richard J.; Angelou, George C.; Wylie-de Boer, Elizabeth C.; Grundahl, Frank.

In: Nature, Vol. 498, 01.06.2013, p. 198-200.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Campbell, SW, D'Orazi, V, Yong, D, Constantino, TN, Lattanzio, JC, Stancliffe, RJ, Angelou, GC, Wylie-de Boer, EC & Grundahl, F 2013, 'Sodium content as a predictor of the advanced evolution of globular cluster stars', Nature, vol. 498, pp. 198-200. https://doi.org/10.1038/nature12191

APA

Campbell, S. W., D'Orazi, V., Yong, D., Constantino, T. N., Lattanzio, J. C., Stancliffe, R. J., Angelou, G. C., Wylie-de Boer, E. C., & Grundahl, F. (2013). Sodium content as a predictor of the advanced evolution of globular cluster stars. Nature, 498, 198-200. https://doi.org/10.1038/nature12191

CBE

Campbell SW, D'Orazi V, Yong D, Constantino TN, Lattanzio JC, Stancliffe RJ, Angelou GC, Wylie-de Boer EC, Grundahl F. 2013. Sodium content as a predictor of the advanced evolution of globular cluster stars. Nature. 498:198-200. https://doi.org/10.1038/nature12191

MLA

Vancouver

Campbell SW, D'Orazi V, Yong D, Constantino TN, Lattanzio JC, Stancliffe RJ et al. Sodium content as a predictor of the advanced evolution of globular cluster stars. Nature. 2013 Jun 1;498:198-200. https://doi.org/10.1038/nature12191

Author

Campbell, Simon W. ; D'Orazi, Valentina ; Yong, David ; Constantino, Thomas N. ; Lattanzio, John C. ; Stancliffe, Richard J. ; Angelou, George C. ; Wylie-de Boer, Elizabeth C. ; Grundahl, Frank. / Sodium content as a predictor of the advanced evolution of globular cluster stars. In: Nature. 2013 ; Vol. 498. pp. 198-200.

Bibtex

@article{c0ed940c09c54c18a0ce04e7d7f34f7c,
title = "Sodium content as a predictor of the advanced evolution of globular cluster stars",
abstract = "The asymptotic giant branch (AGB) phase is the final stage of nuclear burning for low-mass stars. Although Milky Way globular clusters are now known to harbour (at least) two generations of stars, they still provide relatively homogeneous samples of stars that are used to constrain stellar evolution theory. It is predicted by stellar models that the majority of cluster stars with masses around the current turn-off mass (that is, the mass of the stars that are currently leaving the main sequence phase) will evolve through the AGB phase. Here we report that all of the second-generation stars in the globular cluster NGC 6752--70 per cent of the cluster population--fail to reach the AGB phase. Through spectroscopic abundance measurements, we found that every AGB star in our sample has a low sodium abundance, indicating that they are exclusively first-generation stars. This implies that many clusters cannot reliably be used for star counts to test stellar evolution timescales if the AGB population is included. We have no clear explanation for this observation.",
author = "Campbell, {Simon W.} and Valentina D'Orazi and David Yong and Constantino, {Thomas N.} and Lattanzio, {John C.} and Stancliffe, {Richard J.} and Angelou, {George C.} and {Wylie-de Boer}, {Elizabeth C.} and Frank Grundahl",
year = "2013",
month = jun,
day = "1",
doi = "10.1038/nature12191",
language = "English",
volume = "498",
pages = "198--200",
journal = "Nature",
issn = "0028-0836",
publisher = "Nature Publishing Group",

}

RIS

TY - JOUR

T1 - Sodium content as a predictor of the advanced evolution of globular cluster stars

AU - Campbell, Simon W.

AU - D'Orazi, Valentina

AU - Yong, David

AU - Constantino, Thomas N.

AU - Lattanzio, John C.

AU - Stancliffe, Richard J.

AU - Angelou, George C.

AU - Wylie-de Boer, Elizabeth C.

AU - Grundahl, Frank

PY - 2013/6/1

Y1 - 2013/6/1

N2 - The asymptotic giant branch (AGB) phase is the final stage of nuclear burning for low-mass stars. Although Milky Way globular clusters are now known to harbour (at least) two generations of stars, they still provide relatively homogeneous samples of stars that are used to constrain stellar evolution theory. It is predicted by stellar models that the majority of cluster stars with masses around the current turn-off mass (that is, the mass of the stars that are currently leaving the main sequence phase) will evolve through the AGB phase. Here we report that all of the second-generation stars in the globular cluster NGC 6752--70 per cent of the cluster population--fail to reach the AGB phase. Through spectroscopic abundance measurements, we found that every AGB star in our sample has a low sodium abundance, indicating that they are exclusively first-generation stars. This implies that many clusters cannot reliably be used for star counts to test stellar evolution timescales if the AGB population is included. We have no clear explanation for this observation.

AB - The asymptotic giant branch (AGB) phase is the final stage of nuclear burning for low-mass stars. Although Milky Way globular clusters are now known to harbour (at least) two generations of stars, they still provide relatively homogeneous samples of stars that are used to constrain stellar evolution theory. It is predicted by stellar models that the majority of cluster stars with masses around the current turn-off mass (that is, the mass of the stars that are currently leaving the main sequence phase) will evolve through the AGB phase. Here we report that all of the second-generation stars in the globular cluster NGC 6752--70 per cent of the cluster population--fail to reach the AGB phase. Through spectroscopic abundance measurements, we found that every AGB star in our sample has a low sodium abundance, indicating that they are exclusively first-generation stars. This implies that many clusters cannot reliably be used for star counts to test stellar evolution timescales if the AGB population is included. We have no clear explanation for this observation.

U2 - 10.1038/nature12191

DO - 10.1038/nature12191

M3 - Journal article

C2 - 23719375

VL - 498

SP - 198

EP - 200

JO - Nature

JF - Nature

SN - 0028-0836

ER -