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Globular Cluster — Bulge connection: Population synthesis models with multiple populations

Published online by Cambridge University Press:  11 March 2020

Chul Chung Open the ORCID record for Chul Chung [Opens in a new window] ,
Young-Wook Lee ,
Dongwook Lim ,
Seungsoo Hong ,
Jenny J. Kim ,
Yijung Kang  and
Suk-Jin Yoon
Chul Chung
Affiliation:
Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University, Seoul 03722, Republic of Korea email: [email protected]
Young-Wook Lee
Affiliation:
Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University, Seoul 03722, Republic of Korea email: [email protected]
Dongwook Lim
Affiliation:
Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University, Seoul 03722, Republic of Korea email: [email protected]
Seungsoo Hong
Affiliation:
Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University, Seoul 03722, Republic of Korea email: [email protected]
Jenny J. Kim
Affiliation:
Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University, Seoul 03722, Republic of Korea email: [email protected]
Yijung Kang
Affiliation:
Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University, Seoul 03722, Republic of Korea email: [email protected]
Suk-Jin Yoon
Affiliation:
Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University, Seoul 03722, Republic of Korea email: [email protected]
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Abstract

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Recent analyses of Lee et al. (2018, 2019) have confirmed that Galactic bulge consists of stellar populations originated from Milky Way globular clusters (MWGCs). Motivated by this, here we present the evolutionary population synthesis (EPS) for the Galactic bulge and early-type galaxies (ETGs) with the realistic treatment of individual variations in light elements observed in the MWGCs. We have utilized our model with GC-origin populations to explain the CN spread observed in ETGs, and the results show remarkable matches with the observations. We further employ our model to estimate the age of ETGs, which are considered as good analogs for the MW bulge. We find that, without the effect of our new treatments, EPS models will almost always underestimate the true age of ETGs. Our analysis indicates that the EPS with GC-origin populations is an essential constraint in determining the ETG formation epoch and is closely related to understanding the evolution of the Universe.

Keywords

globular clusters: generalstars: abundancesGalaxy: bulgeGalaxy: formationgalaxies: elliptical and lenticular, cDgalaxies: evolution
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. 277 - 280
Copyright
© International Astronomical Union 2020

References

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