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العنوان
Studying spectral behavior, Accretion processes and photometric behavior of some binary stars in the ultraviolet and optical regions /
الناشر
Gamal Edin Mohamed Naguib Gamal Edin Hamed ,
المؤلف
Gamal Edin Mohamed Naguib Gamal Edin Hamed
هيئة الاعداد
باحث / Gamal Edin Mohamed Naguib Gamal Edin Hamed
مشرف / Shahinaz Mostafa Ali Yousef
مشرف / Mostafa Abedelbaky Elrafy
مشرف / Magdy Rabie Sanad
مناقش / Ahmed-Essam Elsayed
تاريخ النشر
2018
عدد الصفحات
113 P. ;
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
الفيزياء الذرية والجزيئية ، وعلم البصريات
تاريخ الإجازة
21/2/2018
مكان الإجازة
جامعة القاهرة - كلية العلوم - Astronomy and Meteorology
الفهرس
Only 14 pages are availabe for public view

from 148

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Abstract

We study the evolution of the normalized flux of selected ultraviolet emission lines of three classical novae (PW Vul, V1668 Cyg and V1974 Cyg). Different phases of the outbursts are studied. We attribute the spectral behavior of the three systems to the variation of the optical thickness and temperature of the envelope during the different phases of the outbursts. Our results are consistent with the theoretical models of classical novae. We also present optical photometric observations of the three systems in the post- novae phase. These observations show the variation of the light curves of these systems and the different times of maxima and minima