The effects of individual metal contents on isochrones for C, N, O, Na, Mg, Al, Si, and Fe
| Autor: | Chongsam Na, Minje Beom, Yang-Seon Kim, Jason W. Ferguson |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
010308 nuclear & particles physics Abundance (chemistry) Metal ions in aqueous solution Analytical chemistry FOS: Physical sciences Astronomy and Astrophysics Single parameter 01 natural sciences Red-giant branch Metal Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science visual_art Globular cluster 0103 physical sciences visual_art.visual_art_medium 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) |
| DOI: | 10.48550/arxiv.1608.05078 |
| Popis: | 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, as 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. Comment: published in ApJ (Aug 1. 2016) / accepted for publication in ApJ (May 25. 2016) / 11 pages, 9 figures, 5 tables / ads address: http://adsabs.harvard.edu/abs/2016ApJ...826..155B |
| Databáze: | OpenAIRE |
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