Mohammed Abdelsabour Abdellatif <br/><br/>
Study of cepheid variable stars using large photometric databases /  
 دراسة النجوم المتغيرة من النوع القيفاوى باستخدام قاعدة البيانات الفوتومترية 
Mohammed Abdelsabour Abdellatif ; Supervised Mohamed Saleh Elnawawy , Mohamed Abdelaziz Rassem , Mohamed Samir Aboelazm 
 - Cairo :   Mohammed Abdelsabour Abdellatif ,   2005 
 - 114p :   ill ;   30cm 
<br/><br/>Thesis (PH.D.) - Cairo University - Faculty Of Science - Department Of Astronomy and Meteorology 
<br/><br/> A brief account is given about the main properties of these variables with an indication on the physics of stellar pulsationThe rate of period variation for the sample members has been determined through the (O - C) values The correlation between the period change and both of the period and the amplitude variation has been discussed The importance of this investigation is to locate exactly location in the instability strip in the H - R diagram 
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<br/><br/><label>Subjects--Index Terms: </label>Photometric databases Variable stars