Chromospheric activity on the RS Canum Venaticorum binary SZ Piscium

	Chromospheric activity on the RS Canum Venaticorum binary SZ Piscium
	Zhang LY(张立云)1,2 ; Gu SH(顾盛宏)1
刊名	ASTRONOMY & ASTROPHYSICS
	2008-08
卷号	487 期号:2 页码:709-716
关键词	stars : binaries : eclipsing stars : binaries : spectroscopic stars : chromospheres stars : activity stars : late-type stars : individual
ISSN号	0004-6361
通讯作者	Zhang, LY (reprint author), Chinese Acad Sci, Joint Lab Opt Astron, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	Aims. We present the new high-resolution echelle spectra of SZ Psc, obtained in Nov. 2004 and Sep.- Dec. 2006, and study its chromospheric activity. Methods. By means of the spectral subtraction technique, we analyze our spectroscopic observations including several optical chromospheric activity indicators (the He I D(3), Na I D(1), D(2), H alpha, and Ca II infrared triplet lines). Results. All indicators show that the chromospheric activity of the system is associated with the cooler component. We find that the values of EW(8542)/EW(8498) are in the range 1-3, which indicates optically thick emission in plage-like regions. The 2006 data suggest the presence of active longitude phenomena. For the Ca II 8542 and 8662 and the Ha lines, it seems that the excess emission is stronger near the two quadratures of system. This may be anti-correlated with the behavior of the Na I D(1) line. The absorption features are detected in the subtracted Ha lines, which could be explained by prominence-like extended material seen on the stellar disk or by mass transfer from the cooler component to the hotter one.
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]	MULTIWAVELENGTH OPTICAL OBSERVATIONS ; TIME-RESOLVED SPECTROSCOPY ; ORBITAL PERIOD VARIATION ; H-ALPHA EMISSION ; CA-II EMISSION ; INFRARED TRIPLET ; CLOSE BINARIES ; ECLIPSE OBSERVATIONS ; PHYSICAL-PROPERTIES ; STELLAR ACTIVITY
收录类别	SCI ; EI
原文出处	http://www.aanda.org/articles/aa/abs/2008/32/aa09688-08/aa09688-08.html
语种	英语
WOS记录号	WOS:000258327900040
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5194]
专题	云南天文台_恒星物理研究组
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Joint laboratory for Optical Astronomy, Chinese Academy of Sciences, Kunming 650011, PR China 2.Graduate School of Chinese Academy of Sciences, Beijing 100039, PR China
推荐引用方式 GB/T 7714	Zhang LY,Gu SH. Chromospheric activity on the RS Canum Venaticorum binary SZ Piscium[J]. ASTRONOMY & ASTROPHYSICS,2008,487(2):709-716.
APA	Zhang LY,&Gu SH.(2008).Chromospheric activity on the RS Canum Venaticorum binary SZ Piscium.ASTRONOMY & ASTROPHYSICS,487(2),709-716.
MLA	Zhang LY,et al."Chromospheric activity on the RS Canum Venaticorum binary SZ Piscium".ASTRONOMY & ASTROPHYSICS 487.2(2008):709-716.