The mass transfer in binary stars systems

العناوين الأخرى

انتقال الكتلة في أنظمة النجوم الثنائية

مقدم أطروحة جامعية

al-Hamdani, Muhammad Rida Abd al-Amir

مشرف أطروحة جامعية

Zaki, Wafa Hasan Ali

الجامعة

جامعة بغداد

الكلية

كلية العلوم

القسم الأكاديمي

قسم الفلك و الفضاء

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2005

الملخص الإنجليزي

Studying the phenomena of mass transfer from primary star to the secondary in the binary stellar systems is an important case in the study of the stellar evolution in particular, of all different types of binary stars especially the eclipsing system.

There are various models suggested to interpret this phenomenon; such as Roche model ; as well as the model of the stellar winds, which is a rather complicated model.

The aim of this study is to calculate the mass transfer rate and the time average of this rate between the two stars in a binary system and to find the volume and the radius of the accretion disk in the secondary star .

Many kinds of stellar systems have been processed.

For each one there was a unique time average of the mass transfer in addition to calculating Roche's radius for a group of binary stars systems and as a result of the phenomena of mass transfer , calculating the change in the distance between the two stars in the system and calculating the change in the orbital period for the binary system has been studied.

The technique of calculating the time average for the overflow and mass transfer has been chosen from noticing the change in the orbital period for the secondary stars .

The results and conclusions of new empirical formula for the radius of the accretion disk of the secondary stars have been investigated .

The additional modified criterion of the mass transfer rate has been applied instead of the classical criterion for Roche model

التخصصات الرئيسية

الفلك و علومه

عدد الصفحات

77

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-603324