V551 Aur,an oEA binary with g-mode pulsations?  

作　　者：Nian Liu Xiao-Bin Zhang An-Bin Ren Li-Cai Deng Zhi-Quan Luo 

机构地区：[1]Institute of Theoretical Physics, China West Normal University, Nanchong 637002, China [2]National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China

出　　处：《Research in Astronomy and Astrophysics》2012年第6期671-677,共7页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China (GrantNos. 10773015 and 10778719)

摘　　要：We present time-series CCD photometry of V551 Aur, an eclipsing binary located in the open cluster NGC 2126 that shows δ Scuti-like pulsations. Complete covered light curves in theBand V bands were obtained with high-precision over nine nights. Based on them, a revised orbital period and the first photometric solutions were determined. Our eclipsing light-curve synthesis reveals a detached configura- tion for the binary system with a mass-ratio of about 0.73, and the mean density of the pulsating primary component was deduced to be about （0.532±0.005）ρ. A fre- quency analysis of the eclipse-subtracted light curve yields two reliable frequencies at f1=7.727013（c/d） and f2=15.45403（c/d）, respectively. With the help of the derived mean density, mode identification was performed. The result suggests that the primary component of V551 Aur is very probably g-mode oscillations.We present time-series CCD photometry of V551 Aur, an eclipsing binary located in the open cluster NGC 2126 that shows δ Scuti-like pulsations. Complete covered light curves in theBand V bands were obtained with high-precision over nine nights. Based on them, a revised orbital period and the first photometric solutions were determined. Our eclipsing light-curve synthesis reveals a detached configura- tion for the binary system with a mass-ratio of about 0.73, and the mean density of the pulsating primary component was deduced to be about （0.532±0.005）ρ. A fre- quency analysis of the eclipse-subtracted light curve yields two reliable frequencies at f1=7.727013（c/d） and f2=15.45403（c/d）, respectively. With the help of the derived mean density, mode identification was performed. The result suggests that the primary component of V551 Aur is very probably g-mode oscillations.

关 键 词：stars： binaries： eclipsing -- stars： oscillations -- stars： individual （V551Aur） -- open cluster： individual （NGC 2126） 

分 类 号：P145.2[天文地球—天体物理] TH137.51[天文地球—天文学]