Hydrostatic equilibrium of stars in main sequence

العناوين الأخرى

التوازن الهايدروستاتيكي لنجوم التتابع الرئيسي

مقدم أطروحة جامعية

al-Jabburi, Muhannad Nafi Hamid

مشرف أطروحة جامعية

Salih, Muhammad Ahmad

أعضاء اللجنة

al-Birmani, Muhammad Jafar Fadil
Karam, Nihad Ali

الجامعة

جامعة بغداد

الكلية

كلية العلوم

القسم الأكاديمي

قسم الفلك و الفضاء

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2006

الملخص الإنجليزي

The equations of stellar structure have been studied in the state of hydrostatic equilibrium.

the equation of hydrostatic equilibrium cannot be integrated directly to give a simple model for pressure, density, and temperature in the star, thus two models of stellar structure applied with different main sequence stars to understand the state of hydrostatic equilibrium.

In the first one it had been assumed that the density varies linearly from the centre of the star to the surface, this model is called the Linear Stellar Model this model is too simple to represent real star, but it gives qualitatively useful results.

In the second one it has been assumed that the pressure and density related throughout the star by an equation of polytropic form, this model called the Polytropic Stellar Model.

This is model extremely useful in analyzing the behaviour of gravitational gaseous configurations, and it is very close to the real state of stellar structure than the first model.

The polytropic model has been applied with two values of the polytropic index n .

The solution of n =1.5 has been compared with the linear stellar model and the solution of n = 3 has been compared with the standard stellar model.

التخصصات الرئيسية

الفلك و علومه

عدد الصفحات

77

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-603530