The effects of individual metal contents on isochrones for C, N, O, Na, Mg, Al, Si, and Fe

Minje Beom, Chongsam Na, Jason W. Ferguson, Yong Cheol Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The individual characteristics of C, N, O, Na, Mg, Al, Si, and Fe on isochrones have been investigated in this study. Stellar models have been constructed for various mixtures in which the content of each element is changed up to the extreme value reported in recent studies, and the changes in isochrone shape have been analyzed for the various mixtures. To express the abundance variation of different elements with a single parameter, we have focused on the relative changes in the total number of metal ions. A review of the shape changes revealed that Na, Mg, and Al work the same way in stellar models, similar to the well-known fact that C, N, and O have the same reactions in the stellar interior. In addition, it was found that in high-metallicity conditions the influence of Si and Fe on the red giant branch becomes smaller than that of Na, Mg, and Al closer to the tip. Furthermore, the influence of Fe on the main sequence is larger than that of Na, Mg, Al, and even Si.

Original languageEnglish
Article number155
JournalAstrophysical Journal
Volume826
Issue number2
DOIs
Publication statusPublished - 2016 Aug 1

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stellar models
stellar interiors
metal
metals
metallicity
metal ions
ion
effect
parameter

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

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title = "The effects of individual metal contents on isochrones for C, N, O, Na, Mg, Al, Si, and Fe",
abstract = "The individual characteristics of C, N, O, Na, Mg, Al, Si, and Fe on isochrones have been investigated in this study. Stellar models have been constructed for various mixtures in which the content of each element is changed up to the extreme value reported in recent studies, and the changes in isochrone shape have been analyzed for the various mixtures. To express the abundance variation of different elements with a single parameter, we have focused on the relative changes in the total number of metal ions. A review of the shape changes revealed that Na, Mg, and Al work the same way in stellar models, similar to the well-known fact that C, N, and O have the same reactions in the stellar interior. In addition, it was found that in high-metallicity conditions the influence of Si and Fe on the red giant branch becomes smaller than that of Na, Mg, and Al closer to the tip. Furthermore, the influence of Fe on the main sequence is larger than that of Na, Mg, Al, and even Si.",
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The effects of individual metal contents on isochrones for C, N, O, Na, Mg, Al, Si, and Fe. / Beom, Minje; Na, Chongsam; Ferguson, Jason W.; Kim, Yong Cheol.

In: Astrophysical Journal, Vol. 826, No. 2, 155, 01.08.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The effects of individual metal contents on isochrones for C, N, O, Na, Mg, Al, Si, and Fe

AU - Beom, Minje

AU - Na, Chongsam

AU - Ferguson, Jason W.

AU - Kim, Yong Cheol

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