Sayeda Mostafa Amin Shabaan <br/><br/>
Study of Period Changes and Light Curve Analysis of Selected Close Binaries /  
 دراسة تغيرات الدورة وتحليل منحنيات الضوء فى بعض النجوم المزدوجة المتقاربة 
Sayeda Mostafa Amin Shabaan ; Supervised Mohamed Adel Sharaf , Mohamed Abd El aziz Rassem , Mohamed Samir Aboelazm 
 - Cairo :   Sayeda Mostafa Amin Shabaan ,   2006 
 - 167P :   charts ;   30cm 
<br/><br/>Thesis (Ph.D.) - Cairo University - Faculty Of Science - Department Of Astronomy and Meteorology 
<br/><br/> Binary stars are important for many reasons They provide valuable mass , radius and luminosity data of the stars The determination of the orbital parameters as well as the studying of the causes that are responsible for the observed change in orbital periods of binary systems may be considered of the most important tools for understanding the evolution and the interior structure of the stars 
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<br/><br/><label>Subjects--Index Terms: </label>Close Binaries Light Curve Period Changes