TY  - GEN
AU  - Mohammed Abdelsabour Abdellatif
AU  - Mohamed Abdelaziz Rassem , 
AU  - Mohamed Saleh Elnawawy , 
AU  - Mohamed Samir Aboelazm , 
TI  - Study of cepheid variable stars using large photometric databases / 
PY  - 2005///
CY  - Cairo : 
PB  - Mohammed Abdelsabour Abdellatif , 
KW  - Photometric databases
KW  - Variable stars
N1  - Thesis (PH.D.) - Cairo University - Faculty Of Science - Department Of Astronomy and Meteorology; Issued also as CD
N2  - 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
ER  -