Diaa Eldin Abdelrady Ibrahim Fouda <br/><br/>
Model atmosphere analysis of helium rich white dwarf /  
 تحليل ودراسة الاقزام البيضاء الغنية بالهليوم بواسطة نماذج اجواء النجوم 
Diaa Eldin Abdelrady Ibrahim Fouda ; Supervised Mohamed Abdelaziz Rassem , Mohamed Sayed Aboelella 
 - Cairo :   Diaa Eldin Abdelrady Ibrahim Fouda ,   2007 
 - 82Leaves :   charts , facsimiles ;   30cm 
<br/><br/>Thesis (M.Sc.) - Cairo University - Faculty Of Science - Department Of Astronomy and Meteorology 
<br/><br/> In the present thesis we provide a grid of NLTE model atmospheres and synthetic spectra to investigate the atmospheric structure of the DO white dwarfs , and to test the effects of NLTE on the physical parameters of the models.Based on the present grid we reanalyzed observed spectra from SDSS 
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<br/><br/><label>Subjects--Index Terms: </label>Helium rich Model Atmosphere WhiteDwarf