Kottamia 74-inch telescope discovery of the new eclipsing binary 2MASS J20004638+0547475.: First CCD photometry and light curve analysis

• Published in: New astronomy 2017-05, Vol.53, p.35-38
• Main Authors: Darwish, M.S., Shokry, A., Saad, S.M., El-Sadek, M.A., Essam, A., Ismail, M.
• Format: Article
• Language: English
• Subjects: 2mass j20004638 + 0547475; Eclipsing binary and mass transfer; Evolution; W Uma
• ISSN: 1384-1076; 1384-1092
• DOI: 10.1016/j.newast.2016.11.009

•Photometric observations of a new eclipsing binary system have been obtained.•The system was found to be as A-subtype of WUMa with fill-out factor of about 69%.•We estimated the orbital and absolute parameters of the new discovered system.•The evolution status was performed along with ZAMS and TAMS tracks. A CCD photometric study is presented for the eclipsing binary system 2MASS J20004638+ 0547475. Observations of the system were obtained in the V, R and I colours with the 2Kx2K CCD attached to 1.88m Kottamia Optical Telescope. New times of light minimum and new ephemeris were obtained. The V, R and I light curves were analyzed using the PHOEBE 0.31 program to determine geometrical and physical parameters of the system. The results show that 2MASS J20004638+ 0547475, is A-Type WUMa and is an overcontact binary with high fill-out factor= 69%. The current evolutionary status of the system indicates that the primary component lies very close to the main sequence while the secondary is evolved. The asymmetric maxima were studied and a modeling of the hot spot parameters is given.