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凤凰座SX型变星CY Aqr光变周期长期变化研究的新进展

A NEW STUDY OF THE LONG-TERM VARIABILITY OF THE SX PHOENICIS STAR CY AQUARII
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摘要 通过对凤凰座SX型变星CY Aqr的观测测定了2个新的光变极大时刻,并利用文献中光变曲线资料得出了3个新的光变极大时刻.结合已发表的数据点,拟合得出新的极大时刻计算公式,并作出了O-C图.用新的数据检验现有的两种解释该星周期变化的理论表明轨道光时效应模型更为合理. Two new times of its maximum light are detected by new observations of the SX Phe star CY Aqr. Three new maximum times are determined from the data in the literature. Combining with the data obtained before, a new ephemeris formula is proposed. Checking the two models with the new data on the O- C diagram shows that the interpretation concerning the linear period change with the light-time effect in a binary system seems more reasonable.
出处 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2007年第6期621-623,共3页 Journal of Beijing Normal University(Natural Science)
基金 国家自然科学基金资助项目(1067300110778601) 北京师范大学本科科研基金资助项目
关键词 脉动变星 凤凰座SX型变星 CY Aqr 脉动周期稳定性 pulsating variable SX Phe CY Aqr stability of pulsation period
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参考文献10

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