Orbital period changes and photometric study of contact binary system AK Her

New Astronomy ◽  
2010 ◽  
Vol 15 (4) ◽  
pp. 339-342 ◽  
Author(s):  
A. Samadi ◽  
D.M.Z. Jassur ◽  
S. Nassiri ◽  
G. Gozaliasl ◽  
M.H. Kermani ◽  
...  
2014 ◽  
Vol 979 ◽  
pp. 20-22 ◽  
Author(s):  
Wiraporn Maithong ◽  
Chatchai Kruea-In ◽  
Somsawat Rattanasoon

The physical parameters study of contact binary system AY Aquarius, the observations were done in 12th September 2011 at The Cerro Tololo Inter-American Observatory (CTIO), Chile. The Prompt4 0.4 - meter Ritchey-Chretien reflecting telescope and CCD Apogee Alta 10241024 pixels with standard visual and red filters of UBV were used. The orbital period of the contact binary system is about 0.28199 days. The photometry was analyzed by MaxIm program and used Wilson-Devinney technique to calculate the physical properties.


2016 ◽  
Vol 49 (3) ◽  
pp. 65-71
Author(s):  
N.S. AWADALLA ◽  
M.A. HANNA ◽  
M.N. ISMAIL ◽  
I.A. HASSAN ◽  
M.A. ELKHAMISY

Astrophysics ◽  
2011 ◽  
Vol 54 (3) ◽  
pp. 392-402 ◽  
Author(s):  
N. A. Virnina ◽  
I. L. Andronov ◽  
K. A. Antonyuk

2004 ◽  
Vol 17 (4) ◽  
pp. 435-441
Author(s):  
J. Lucinda ◽  
D. W. Foryta ◽  
M. G. Rodbard
Keyword(s):  

2019 ◽  
Vol 19 (12) ◽  
pp. 174 ◽  
Author(s):  
Quan-Wang Han ◽  
Li-Fang Li ◽  
Deng-Kai Jiang

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