New observations of chromospheric and prominence activity on the RS CVn-type binary SZ Piscium

	New observations of chromospheric and prominence activity on the RS CVn-type binary SZ Piscium
	Cao DT(曹东涛)1,2,3 ; Gu SH(顾盛宏)1,2
刊名	ASTRONOMY & ASTROPHYSICS
	2012-02
卷号	538
关键词	binaries: eclipsing binaries: spectroscopic stars: activity stars: coronae stars: chromospheres
ISSN号	0004-6361
通讯作者	Cao, DT (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	Aims. New high-resolution spectroscopic observations were made for the RS CVn-type binary SZ Psc aimed at searching for evidence of stellar prominences in this system and studying its chromospheric activity. Methods. By means of the spectral subtraction technique, we searched for prominence-like events in the H-alpha spectra, and also analyzed several optical chromospheric activity indicators (the He (I) D-3, Na (I) D-1, D-2, H-alpha, and Ca (II) IRT lines) included in our observations. Results. The emission in the H-alpha and Ca (II) IRT lines show that the cooler component is very active, supporting earlier work. Notably, some absorption features are detected in the subtracted H-alpha profiles, and one of them may result from prominence-like material on the cooler component of the system. According to a model of stellar prominences, the distance of the prominence from the rotation axis of the cooler component is calculated to be close to the corotation radius and to exceed the Roche lobe of the cooler component.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	CA-II H ; CANUM-VENATICORUM ; CLOSE BINARIES ; ALPHA ; SYSTEMS ; STAR ; EMISSION
收录类别	SCI ; EI
原文出处	http://www.aanda.org/articles/aa/abs/2012/02/aa18184-11/aa18184-11.html
语种	英语
WOS记录号	WOS:000300614100130
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5225]
专题	云南天文台_恒星物理研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, PR China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, PR China 3.Graduate University of Chinese Academy of Sciences, Beijing 100049, PR China
推荐引用方式 GB/T 7714	Cao DT,Gu SH. New observations of chromospheric and prominence activity on the RS CVn-type binary SZ Piscium[J]. ASTRONOMY & ASTROPHYSICS,2012,538.
APA	Cao DT,&Gu SH.(2012).New observations of chromospheric and prominence activity on the RS CVn-type binary SZ Piscium.ASTRONOMY & ASTROPHYSICS,538.
MLA	Cao DT,et al."New observations of chromospheric and prominence activity on the RS CVn-type binary SZ Piscium".ASTRONOMY & ASTROPHYSICS 538(2012).