The later evolution of the contact binaries AP Leo, AK Her, AB and and AM Leo

	The later evolution of the contact binaries AP Leo, AK Her, AB and and AM Leo
	Li LF(李立芳); Han ZW(韩占文); Zhang FH(张奉辉); Han ZW(韩占文); Li LF(李立芳); Zhang FH(张奉辉)
	2002
会议名称	187 Colloquium on Exotic Stars as Challenges to Evolution
会议日期	2002-03-04
会议地点	MIAMI, FL
卷号	279
页码	331-336
通讯作者	Li, L (reprint author), CAS, Natl Astron Observ, Yunnan Observ, Kunming, Yunnan Province, Peoples R China.
英文摘要	A detailed study of the periods and light curves of binaries AK Her, AP Leo, AB And and AM Leo is presented. Based on the study of the O - C curves, we find that the period variation of each system contains several components with different frequencies, and we suggest that the periodical variations in the periods are likely influenced by different mechanisms. Based on the study of the light curve changes, we find that the light curves exhibit two kinds of variations: rapid variations and long-term variations. We investigate the physical mechanisms which may underlie the variations of the period and the light curve of each system and obtain some new conclusions. According to the characteristics of the rapid light variation in these systems, we suggest that the rapid change in the light curve is probably caused by pulsation of the common envelope, and that the mechanism(s) causing the pulsation may be mass transfer through the inner Lagrangian point L-1 or its variation. Finally, the evolutionary trends of these systems are discussed, and we suggest that these systems may be progenitors of cataclysmic variables.
收录类别	CPCI
产权排序	第一完成单位
会议网址	http://adsabs.harvard.edu/abs/2002ASPC..279..331L
会议录	ASTRONOMICAL SOCIETY OF THE PACIFIC (ASP) CONFERENCE SERIES - EXOTIC STARS AS CHALLENGES TO EVOLUTION, PROCEEDINGS
会议录出版者	ASTRONOMICAL SOC PACIFIC
会议录出版地	390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
学科主题	Astronomy & Astrophysics
语种	英语
ISBN号	1-58381-122-2
内容类型	会议论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/224]
专题	云南天文台_大样本恒星演化研究组
通讯作者	Li LF(李立芳)
推荐引用方式 GB/T 7714	Li LF,Han ZW,Zhang FH,et al. The later evolution of the contact binaries AP Leo, AK Her, AB and and AM Leo[C]. 见:187 Colloquium on Exotic Stars as Challenges to Evolution. MIAMI, FL. 2002-03-04.http://adsabs.harvard.edu/abs/2002ASPC..279..331L.