Chromospheric activity on the RS CVn-type binary UX Arietis

doi:10.1051/0004-6361:20020561

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	Chromospheric activity on the RS CVn-type binary UX Arietis
	Gu SH(顾盛宏); Tan HS(谭徽松); Dan HG(单红光); Zhang FH(张奉辉); Gu, SH (reprint author), Chinese Acad Sci, Natl Astron Observ, Joint Lab Opt Astron, Yunnan Observ, Kunming, Peoples R China.
发表期刊	ASTRONOMY & ASTROPHYSICS
	2002-06
卷号	388 期号:3 页码:889-898
DOI	10.1051/0004-6361:20020561
产权排序	第1完成单位
收录类别	SCI
关键词	Stars : Activity Stars : Binaries : Close Stars : Chromosphere Stars : Flare Stars : Individual : Ux Ari
摘要	High resolution spectroscopic observations of UX Ari made during three observing seasons in 2000 have been analyzed by means of the spectral subtraction technique. The information about chromospheric activity of UX Ari has been obtained from several optical chromospheric activity indicators such as the Hei D-3, Nai D-1, D-2, H-alpha, and CaII IRT lines. The results suggest the chromospheric activity of the system is associated with the cooler secondary. An orbital phase modulation of chromospheric emissions is found, and consequently the activity longitude area of the system is obtained, that corresponds to the phase interval near the second quadrature of the binary system. A are-like event is detected during our new observations, characterized by the dramatic increase in the Halpha and CaII IRT emission lines, that is confirmed by the emission of the Hei D-3 line and the filled-in cores of the Nai D-1, D-2 lines. It is found that the values of the EW8542/EW8498 ratio decrease when the activity of the system increases, especially when the are occurs. The small values of the EW8542/EW8498 ratio indicate that the CaII IRT emissions come from plage-like regions. The high activity level of UX Ari around the quadrature may originate with the coupling between the chromospheric activity of the secondary and the mass transfer activity of the two components.
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-6361
URL	查看原文
归档日期	2002-10-16
WOS记录号	WOS:000176441300013
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	MULTIWAVELENGTH OPTICAL OBSERVATIONS ; TIME-RESOLVED SPECTROSCOPY ; SHORT-PERIOD SYSTEMS ; H-ALPHA ; CANUM-VENATICORUM ; URSAE MAJORIS ; EMISSION ; HR-1099
引用统计	被引频次：28[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/5158
专题	恒星物理研究组
通讯作者	Gu, SH (reprint author), Chinese Acad Sci, Natl Astron Observ, Joint Lab Opt Astron, Yunnan Observ, Kunming, Peoples R China.
作者单位	Yunnan Observatory, Joint laboratory for optical astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Kunming, PR China
第一作者单位	中国科学院云南天文台
推荐引用方式 GB/T 7714	Gu SH,Tan HS,Dan HG,et al. Chromospheric activity on the RS CVn-type binary UX Arietis[J]. ASTRONOMY & ASTROPHYSICS,2002,388(3):889-898.
APA	Gu SH,Tan HS,Dan HG,Zhang FH,&Gu, SH .(2002).Chromospheric activity on the RS CVn-type binary UX Arietis.ASTRONOMY & ASTROPHYSICS,388(3),889-898.
MLA	Gu SH,et al."Chromospheric activity on the RS CVn-type binary UX Arietis".ASTRONOMY & ASTROPHYSICS 388.3(2002):889-898.

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