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A critical assessment of models for the origin of multiple populations in globular clusters

Published online by Cambridge University Press:  31 March 2017

Nate Bastian
Nate Bastian*
Affiliation:
Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool L3 5RF, UK email: N.J.Bastian@ljmu.ac.uk
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Abstract

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A number of scenarios have been put forward to explain the origin of the chemical anomalies (and resulting complex colour-magnitude diagrams) observed in globular clusters (GCs), namely the AGB, Fast Rotating Massive Star, Very Massive Star, and Early Disc Accretion scenarios. We compare the predictions of these scenarios with a range of observations (including young massive clusters (YMCs), chemical patterns, and GC population properties) and find that all models are inconsistent with observations. In particular, YMCs do not show evidence for multiple epochs of star-formation and appear to be gas free by an age of ~ 3 Myr. Also, the chemical patterns displayed in GCs vary from one to the next in such a way that cannot be reproduced by standard nucleosynthetic yields. Finally, we show that the “mass budget problem” for the scenarios cannot be solved by invoking heavy cluster mass loss (i.e. that clusters were 10-100 times more massive at birth) as this solution makes basic predictions about the GC population that are inconsistent with observations. We conclude that none of the proposed scenarios can explain the multiple population phenomenon, hence alternative theories are needed.

Keywords

globular clustersmultiple populationsyoung massive clusters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S316: Formation, evolution, and survival of massive star clusters , August 2015 , pp. 302 - 309
Copyright
Copyright © International Astronomical Union 2017 

References

Bastian, N., Lamers, H. J. G. L. M., de Mink, S. E., et al. 2013a, MNRAS, 436, 2398 Google Scholar
Bastian, N., Cabrera-Ziri, I., Davies, B., & Larsen, S. S. 2013b, MNRAS, 436, 2852 Google Scholar
Bastian, N., Hollyhead, K., & Cabrera-Ziri, I. 2014, MNRAS, 445, 378 Google Scholar
Bastian, N., Cabrera-Ziri, I., & Salaris, M. 2015, MNRAS, 449, 3333 Google Scholar
Bastian, N. & Lardo, C. 2015, MNRAS, 453, 357 Google Scholar
Cabrera-Ziri, I., Bastian, N., Davies, B., et al. 2014, MNRAS, 441, 2754 Google Scholar
Cabrera-Ziri, I., Bastian, N., Longmore, S. N., et al. 2015, MNRAS, 448, 2224 Google Scholar
Colucci, J. E., Bernstein, R. A., & Cohen, J. G. 2014, ApJ, 797, 116 Google Scholar
Conroy, C. 2012, ApJ, 758, 21 Google Scholar
D'Ercole, A., Vesperini, E., D'Antona, F., McMillan, S. L. W., & Recchi, S. 2008, MNRAS, 391, 825 Google Scholar
Decressin, T., Meynet, G., Charbonnel, C., Prantzos, N., & Ekström, S. 2007, A&A, 464, 1029 Google Scholar
Denissenkov, P. A. & Hartwick, F. D. A. 2014, MNRAS, 437, L21 CrossRefGoogle Scholar
de Mink, S. E., Pols, O. R., Langer, N., & Izzard, R. G. 2009, A&A, 507, L1 Google Scholar
Doherty, C. L., Gil-Pons, P., Lau, H. H. B., et al. 2014, MNRAS, 441, 582 Google Scholar
Gratton, R. G., Carretta, E., & Bragaglia, A. 2012, A&ARv, 20, 50 Google Scholar
Hollyhead, K., Bastian, N., Adamo, A., et al. 2015, MNRAS, 449, 1106 Google Scholar
Khalaj, P. & Baumgardt, H. 2015, MNRAS, 452, 924 Google Scholar
Krause, M., Charbonnel, C., Decressin, T., Meynet, G., & Prantzos, N. 2013, A&A, 552, A121 Google Scholar
Kruijssen, J. M. D. 2015, MNRAS, in press (arXiv:1509.02163)Google Scholar
Larsen, S. S., de Mink, S. E., Eldridge, J. J., et al. 2011, A&A, 532, A147 Google Scholar
Larsen, S. S., Strader, J., & Brodie, J. P. 2012, A&A, 544, L14 Google Scholar
Larsen, S. S., Brodie, J. P., Grundahl, F., & Strader, J. 2014, ApJ, 797, 15 Google Scholar
Longmore, S. N. 2015, MNRAS, 448, L62 Google Scholar
Milone, A. P. 2015, MNRAS, 446, 1672 Google Scholar
Mucciarelli, A., Origlia, L., Ferraro, F. R., & Pancino, E. 2009, ApJL, 695, L134 Google Scholar
Nardiello, D., Piotto, G., Milone, A. P., et al. 2015, MNRAS, 451, 312 Google Scholar
Niederhofer, F., Hilker, M., Bastian, N., & Silva-Villa, E. 2015a, A&A, 575, A62 Google Scholar
Niederhofer, F., Georgy, C., Bastian, N., & Ekström, S. 2015b, MNRAS, 453, 2070 Google Scholar
Sbordone, L., Salaris, M., Weiss, A., & Cassisi, S. 2011, A&A, 534, A9 Google Scholar
Schiavon, R. P., Caldwell, N., Conroy, C., et al. 2013, ApJ, 776, L7 Google Scholar
Schiavon, R. P., et al. 2015, MNRAS (submitted)Google Scholar
Renzini, A. 2013, Mem. S. A. It., 84, 162 Google Scholar
Ventura, P., Di Criscienzo, M., Carini, R., & D'Antona, F. 2013, MNRAS, 431, 3642 Google Scholar