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A unified construction of stellar evolution and chemical evolution models for the multiple populations in globular clusters

Published online by Cambridge University Press:  11 March 2020

Sohee Jang Open the ORCID record for Sohee Jang [Opens in a new window] ,
Jenny J. Kim  and
Young-Wook Lee
Sohee Jang
Affiliation:
Center for Galaxy Evolution Research and Department of Astronomy,Yonsei University, Seoul03722, Korea email:[email protected]
Jenny J. Kim
Affiliation:
Center for Galaxy Evolution Research and Department of Astronomy,Yonsei University, Seoul03722, Korea email:[email protected] Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg,Mönchhofstraße 12-14, 69120Heidelberg, Germany
Young-Wook Lee
Affiliation:
Center for Galaxy Evolution Research and Department of Astronomy,Yonsei University, Seoul03722, Korea email:[email protected]
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Abstract

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Recent investigations of multiple stellar populations in globular clusters (GCs) suggest that the horizontal-branch (HB) morphology and mean period of type ab RR Lyrae variables are mostly sensitive to helium abundance, while the star formation timescale has the greatest effect on our chemical evolution model constructed to reproduce the Na-O anti-correlation of GCs. Therefore, by combining the results from synthetic HB model with those from chemical evolution model, we could put better constraints on star formation history and chemical evolution in GCs with multiple populations. From such efforts made for four GCs, M4, M5, M15, and M80, we find that consistent results can be obtained from these two independent models.

Keywords

globular clustersmultiple populationshorizontal-branch
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S351: Star Clusters: From the Milky Way to the Early Universe , May 2019 , pp. 302 - 304
Copyright
© International Astronomical Union 2020

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