دورية أكاديمية
Effects of alpha-enhancement on stellar evolution
| العنوان: | Effects of alpha-enhancement on stellar evolution |
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| المؤلفون: | Guo JP(郭建坡), Zhang FH(张奉辉), Chen XF(陈雪飞), Han ZW(韩占文), Guo, JP (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China. |
| سنة النشر: | 2008 |
| المجموعة: | Yunnan Observatories: YNAO OpenIR (Chinese Academy of Sciences, CAS) / 中国科学院云南天文台机构知识库 |
| مصطلحات موضوعية: | Abundances, Stars : Evolution, Stars : General, Astronomy & Astrophysics, ELLIPTIC GALAXIES, GLOBULAR-CLUSTERS, POPULATION SYNTHESIS, BRANCH STARS, MODELS, ISOCHRONES, OPACITIES, ABUNDANCE, TRACKS, CONSTRAINTS, Science & Technology, Physical Sciences |
| الوصف: | Using Eggleton's code, we systematically show the differences in stellar evolution between the results based on the scaled-solar mixture and the a-enhanced metal mixture. As input, the OPAL high temperature opacities are used for log(T/K) > 4.00, and the new Wichita State low temperature opacities, for log(T/K) <= 4.00. Our calculations cover star masses ranging from 0.25 to 80.0 M(circle dot), spaced at Delta log M = 0.10 or 0.05. The values of metallicities Z are 0.0001, 0.0003, 0.001, 0.004, 0.01, 0.02, 0.03, 0.04, 0.06, 0.08 and 0.10. For a given Z, the initial hydrogen mass fraction is given by X = 0.76 - 3.0Z. We show that alpha-enhancement can raise the stellar effective temperature and luminosity, and reduce the evolutionary age. Compared with some previous work, the effects of alpha-enhancement are more obviously demonstrated in our calculations. |
| نوع الوثيقة: | article in journal/newspaper report |
| اللغة: | English |
| العلاقة: | CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS; Guo JP,Zhang FH,Chen XF,et al. Effects of alpha-enhancement on stellar evolution[J]. CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS,2008,8(3):262-268.; http://ir.ynao.ac.cn/handle/114a53/4456Test; http://iopscience.iop.org/1009-9271/8/3/03Test/ |
| DOI: | 10.1088/1009-9271/8/3/03 |
| الإتاحة: | https://doi.org/10.1088/1009-9271/8/3/03Test http://ir.ynao.ac.cn/handle/114a53/4456Test http://iopscience.iop.org/1009-9271/8/3/03Test/ |
| حقوق: | cn.org.cspace.api.content.CopyrightPolicy@1390051 |
| رقم الانضمام: | edsbas.54A659F |
| قاعدة البيانات: | BASE |
| DOI: | 10.1088/1009-9271/8/3/03 |
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