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

Sohee Jang; Jenny J. Kim; Young Wook Lee

doi:10.1017/S1743921319007518

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

Sohee Jang, Jenny J. Kim, Young Wook Lee

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	302-304
Number of pages	3
Journal	Proceedings of the International Astronomical Union
Volume	14
Issue number	351
DOIs	https://doi.org/10.1017/S1743921319007518
Publication status	Published - 2019

Bibliographical note

Publisher Copyright:
© International Astronomical Union 2020.

All Science Journal Classification (ASJC) codes

Medicine (miscellaneous)
Astronomy and Astrophysics
Nutrition and Dietetics
Public Health, Environmental and Occupational Health
Space and Planetary Science

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Cite this

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abstract = "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.",

author = "Sohee Jang and Kim, {Jenny J.} and Lee, {Young Wook}",

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year = "2019",

doi = "10.1017/S1743921319007518",

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T1 - A unified construction of stellar evolution and chemical evolution models for the multiple populations in globular clusters

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AU - Kim, Jenny J.

AU - Lee, Young Wook

N1 - Publisher Copyright: © International Astronomical Union 2020.

PY - 2019

Y1 - 2019

N2 - 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.

AB - 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.

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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

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