Complex study of the binary stellar system HD 25811

مقدم أطروحة جامعية

al-Thyabat, Ahmad Muhammad

مشرف أطروحة جامعية

Widyan, Hatim Salih
al-Wardah, Mashhur Ahmad

الجامعة

جامعة آل البيت

الكلية

كلية العلوم

القسم الأكاديمي

قسم الفيزياء

دولة الجامعة

الأردن

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2013

الملخص الإنجليزي

COMPlEX STUDY OF THE BINARY STELLAR SYSTEM HD 25811 By Ahmad Mohmmad Al-thyabat.

Master of Physics, Al al-Bayt University, ( Supervisor: Prof. Hatem Saleh Widyan and Dr.

Mashhoor Ahmad Al-Wardat).

Atmospheric modeling of the components of the stellar binary system HD25811 was used to estimate their individual physical and geometrical parameters.

The model atmospheres were constructed using a grid of Kurucz solar metalicity blanketed models, and used to compute a synthetic spectral energy distribution for each component separately, and hence for the entire system.

The entire observational spectral energy distribution of the systems was used as a reference for the comparison with the synthetic ones.

We used the feedback modi_ed parameters and iteration method to get the best _t between synthetic and observational spectral energy distributions. The input parameters of the atmospheric modeling of the individual components, which led to the best _t, represent adequately enough the parameters of the system. These parameters were derived as: Ta eff = 7000 _ 100 K, Tb eff = 6850 _ 100 K, log ga = 4:30 _ 0:08, log gb = 4:30 _ 0:09, Ra = 1:88 _ 0:12R_, Rb = 1:78 _ 0:13R_, and their spectral types were concluded as F1 & F2.

Also, a new parallax of the system was estimated as _ = 5:084 mas (d = 196:7pc).

Finally the formation and evolution of the system were discussed.

التخصصات الرئيسية

الفيزياء

عدد الصفحات

80

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-416240