Open AccessCharge‐coupled device observations of V388 Cyg
Author(s) -
Kang Young Woon,
Kim Hoil,
Lee WooBaik,
Oh KyuDong
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04484.x
Subject(s) - physics , light curve , astrophysics , asymmetry , maxima , maxima and minima , star (game theory) , phase (matter) , quantum mechanics , art , mathematical analysis , mathematics , performance art , art history
We present BVR full‐light curves of V388 Cyg to provide a complete photometric solution for the first time. The light curves show a high degree of asymmetry (O'Connell effect). The maxima at 0.25 phase (Max I) are 0.023, 0.018 and 0.012 mag higher than those at 0.75 phase (Max II) in B , V and R , respectively. Three possible spot models are applied to fit the asymmetric light curves of V388 Cyg, in order to explain the O'Connell effect. We conclude that the model of the cool spot on the cooler star is the most reasonable model for V388 Cyg. The continuous period variation is confirmed by recently collected times of minima, including one minimum that is determined in this paper. The period decrease rate is estimated as dp/dt=−2.055×10 −7 d yr −1 .