Starspot activity on the RS CVn-type binary II Pegasi during 1999-2001

doi:10.1051/0004-6361:20030671

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	Starspot activity on the RS CVn-type binary II Pegasi during 1999-2001
	Gu SH(顾盛宏); Tan HS(谭徽松); Wang XB(王晓彬); Dan HG(单红光); Gu, SH (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Joint Lab Opt Astron, Kunming, Peoples R China.
发表期刊	ASTRONOMY & ASTROPHYSICS
	2003-07
卷号	405 期号:2 页码:763-768
DOI	10.1051/0004-6361:20030671
产权排序	第1完成单位
收录类别	SCI
关键词	Stars : Late-type Stars : Activity Stars : Imaging Stars : Starspots Stars : Individual : Ii Peg
摘要	By means of Doppler imaging, new high-resolution spectroscopic observations of II Peg, carried out in three observing seasons from 1999 to 2001, were analyzed. The lines FeI6430.844 Angstrom and CaI6439.075 Ohm were chosen as map lines, and three surface maps of II Peg were obtained. The results demonstrate that the main features of these surface maps are high-latitude active regions around 60degrees and no polar cap is seen in the maps. The surface patterns of II Peg show large changes, the largest scale active regions appear in July-Aug. 1999 and then they become small and separated in Feb. 2000. The active longitude switches to another hemisphere in Nov.-Dec. 2001 from the one in Feb. 2000. Such spot evolution is not consistent with the activity cycle derived previously.
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	2003-08-06
WOS记录号	WOS:000183615700040
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	STELLAR SURFACE-STRUCTURE ; ACTIVITY CYCLE ; AB DORADUS
引用统计	被引频次：19[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/114a53/5163
专题	恒星物理研究组
通讯作者	Gu, SH (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Joint Lab Opt Astron, Kunming, Peoples R China.
作者单位	National Astronomical Observatories/Yunnan Observatory, Joint Laboratory for Optical Astronomy, 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,Wang XB,et al. Starspot activity on the RS CVn-type binary II Pegasi during 1999-2001[J]. ASTRONOMY & ASTROPHYSICS,2003,405(2):763-768.
APA	Gu SH,Tan HS,Wang XB,Dan HG,&Gu, SH .(2003).Starspot activity on the RS CVn-type binary II Pegasi during 1999-2001.ASTRONOMY & ASTROPHYSICS,405(2),763-768.
MLA	Gu SH,et al."Starspot activity on the RS CVn-type binary II Pegasi during 1999-2001".ASTRONOMY & ASTROPHYSICS 405.2(2003):763-768.

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