Discovery of a Short Period Pulsator from Istanbul University Observatory
Güver, Tolga; Sağlam, Mustafa Turan; Çördük, Meryem; Aliş, Sinan; Özgül, Görkem; Özgüllü, Olcaytuğ; Göktürk, Fatih Erkam; Gündüz, Rahmi; Fişek, Süleyman; Yelkenci, Fuat Korhan; Ülgen, Eyüp Kaan
China
Abstract
We report the discovery of a new short period pulsating variable in the field of exoplanet host star XO-2. Variable has been identified while it was being used as a comparison. In order to verify the variability of the candidate, a comprehensive follow-up was carried out. Period analysis of multi-band light curves revealed a very prominent and consistent pulsation periodicity of P ∼ 0.95 P∼0.95 hours. Given the variability period, amplitude and the color index, the object is most likely a delta Scuti type variable. Absolute magnitude ( M v Mv ) and the color index ( B − V ) 0 (B−V)0 of the star determined as 2.76 2.76 and 0.22 0.22 , respectively. This ( B − V ) 0 (B−V)0 of the star corresponds to A7 spectral type with an approximate effective temperature of 7725 K. Machine-learning analysis of the time-series data also revealed that the object is of variable type DSCT with a probability of 78%.