Research Article
Year 2021,
Volume: 23 Issue: 2, 539 - 542, 04.07.2021
Abstract
Bu çalışmada güncel opaklıkların yıldızların yarıçapları üzerine etkisi araştırılmıştır. Bunun için yeni OPAS opaklık tabloları, Paczynski programları GOB (Dış sınır şartları oluşturmak), SCH, HB8’e uyarlanmıştır ve 0.6-10 Mʘ kütle aralığındaki yıldız modellerine uygulanmıştır. Bu çalışmada, yeni opaklıkların gözlemlenen gerçek yıldız U Oph’un yaşı üzerine etkisi incelenmiştir. Sonuçlar eski opaklık tabloları ile karşılaştırılmıştır.
References
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Year 2021,
Volume: 23 Issue: 2, 539 - 542, 04.07.2021
Abstract
In this study the effect of current opacities on the radii of stars is investigated. For this, the new OPAS opacity tables are adapted in Paczynski programs GOB(Generates the outer boudary), SCH, HB8 and applied to stellar models in the mass range of 0.6-10 Mʘ. In this work, the effect of the new opacity tables on the age of the observed real star U Oph is examined. The results are compared with the old opacity tables.
Keywords
References
- Eddington, S.A., The Internal Constitution of the Stars, Cambridge University Press, Cambridge, (1926)
- Schwarzschild, M., Structure and Evolution of the Stars, Princeton University Press, New Jersey, (1958).
- Carson, T.R., Analytic formulae for Coulomb dipole transitions, Astronomy and Astrophysics Supplement Series,75, 385-389, (1988).
- Iglesias, C.A., Rogers, F.J., Updated Opal Opacities, The Astrophysical Journal, 464, 943-953, ( 1996).
- Peter L. Smith, Claas Heise, Jim R. Esmond, Robert L. Kurucz https://www.cfa.harvard.edu/amp/ampdata/kurucz23/sekur.html, (20.10.2019)
- İnlek, G., Opacity tables for using in Paczynski stellar modelling and their effects on stellar evolutions, Journal of Balikesir University Institute of Science and Technology, 21(2), 578-589, (2019).
- Allard, F., https://opalopacity.llnl.gov/existing.html, (20.10.2020).
- Weiss, A., https://opalopacity.llnl.gov/existing.html, (20.10.2020).
- Rogers, F.J.& Iglesias, Iglesias, C. A., Radiative atomic Rosseland mean opacity tables, The Astrophysical Journal Supplement Series, 79, 507-568, (1992).
- Cox, A.N., Stewart, J.N., Effects of Bound-Bound Absorption on Stellar Opacities, Astrophysical Journal, 67,113, (1962).
- Cox, A.N., Stewart, J.N., Radiative and conductive opacities for eleven Astrophysical mixtures, The Astrophysical Journal Supplement Series, 11, 22, (1965).
- Cox, A.N., Stewart, J.N., Rosseland Opacity Tables for Population II Compositions, The Astrophysical Journal Supplement Series, 19, 261, (1970).
- İnlek, G., Boke, A., Yılmaz, O., Budding, E., Effects of Opacity on Stellar Radii and Their Relevance to Observational Data, Turkish Journal of Physics, 32, 65-77, ( 2008).
- Sanyal, D., Langer, N., Szecsi, D., Yoon, S.C. and Grassitelli, L., Metallicity dependence of envelope inflation in massive stars, Astronomy and Astrophysics, 597, A71, ( 2017).
- Mondet, G., Blancard, C., Cosse, P., Faussurier,G., Opacity Calculations for Solar Mixtures, The Astrophysical Journal Supplement Series, 220, 2, (2015).
- Paczynski,B., Acta Astronomica, 2, 20, (1970).
- Jin, J., Zhu, C., Lü, G., Convection and convective overshooting in stars more massive than 10 Mʘ, Publication of the Astronomical Society of Japan, 817, 116, (2015).
There are 17 citations in total.
Details
| Primary Language | English |
|---|---|
| Journal Section | Research Articles |
| Authors | |
| Publication Date | July 4, 2021 |
| Submission Date | October 20, 2020 |
| Published in Issue | Year 2021 Volume: 23 Issue: 2 |