New CCD photometric investigation of high amplitude δ Scuti star V2455 Cyg  

作　　者：Setareh Ostadnezhad Ghasem Forozani Mohammad Ghanaatian 

机构地区：[1]Department of Physics,Payame Noor University(PNU), P.O. Box 19395-3697, Tehran, Iran

出　　处：《Research in Astronomy and Astrophysics》2020年第7期134-138,共5页天文和天体物理学研究（英文版）

基　　金：supported by the Department of Physics,Payame Noor University,Tehran,Iran。

摘　　要：New V-band CCD observations of variable star V2455 Cyg were performed during two nights in September 2017. According to all times of maximum light and new maxima, the O-C curve was analyzed.The period changes of V2455 Cyg were investigated and the rate of increasing period was obtained to be(1/P) d P/dt = 1.99 × 10^-7 yr-1. Frequency analysis indicated that V2455 Cyg pulsates with the radial p mode and the fundamental frequency is 10.61574 d-1. Physical parameters of V2455 Cyg at mean temperature were determined(e.g., R = 2.52 R⊙and M = 1.92 M⊙). The position of this star in the H-R diagram confirms that V2455 Cyg is a high amplitude δ Scuti star.

关 键 词：techniques:photometric stars:variables:δScuti stars:individual(V2455 Cyg) 

分 类 号：P145.2[天文地球—天体物理]