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Chromospheric activity and rotational modulation of the RS Canum Venaticorum binary V711 Tauri during 1998-2004
Cao DT(曹东涛)1,2,3; Gu SH(顾盛宏)1,2; Cao, DT (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2015-05-11
卷号449期号:2页码:1380-1390
DOI10.1093/mnras/stv110
产权排序第1完成单位
收录类别SCI
关键词Stars: Activity Binaries: Spectroscopic Stars: Chromospheres Stars: Individual: V711 Tau Stars: Late-type
摘要We present long-term high-resolution spectroscopic observations of the very active RS Canum Venaticorum-type star V711 Tau, obtained during several observing runs from 1998 to 2004, and study its chromospheric activity. Using the spectral subtraction technique, several optical chromospheric activity indicators [including the He I D-3, Na I D-1, D-2, H alpha and Ca II infrared triplet (IRT) lines] formed at different atmospheric heights are analysed. Strong chromospheric emission supports earlier results that indicate that V711 Tau is a very active system. Two large optical flares were detected during our observations. The results suggest that the main part of chromospheric emission is attributed to the primary star of the system. The secondary also presents weak emission but is less active. The ratios of EW8542/EW8498 indicate that Ca II IRT emission arises predominantly from plage-like regions. We have found rotational modulation of chromospheric activity in the H alpha and Ca II IRT lines, which suggests the presence of the chromospheric active longitudes over the surface of V711 Tau. Two active longitudes separated by about 180 degrees were observed to dominate the activity, and the so-called flip-flop phenomenon was seen during our observations. Moreover, the chromospheric activity level shows a long-term variation that gradually increases from a deep minimum near the year 2002. A close spatial connection of photospheric spots and chromospheric active regions in both short and long timescales was found for V711 Tau.
项目资助者National Natural Science Foundation of China [10373023, 10773027, 11333006] ; Chinese Academy of Sciences [KJCX2-YW-T24]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0035-8711
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归档日期2015-04-07
WOS记录号WOS:000355337500018
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]MULTIWAVELENGTH OPTICAL OBSERVATIONS ; RESOLUTION SPECTROGRAPH OBSERVATIONS ; MUSICOS 1998 CAMPAIGN ; CVN SYSTEM HR-1099 ; H-ALPHA EMISSION ; DWARF LQ HYA ; II-PEGASI ; DIFFERENTIAL ROTATION ; STARSPOT EVOLUTION ; LAMBDA-ANDROMEDAE
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被引频次:4[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/114a53/6809
专题系外行星研究组
中国科学院天体结构与演化重点实验室
通讯作者Cao, DT (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
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Cao DT,Gu SH,Cao, DT . Chromospheric activity and rotational modulation of the RS Canum Venaticorum binary V711 Tauri during 1998-2004[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2015,449(2):1380-1390.
APA Cao DT,Gu SH,&Cao, DT .(2015).Chromospheric activity and rotational modulation of the RS Canum Venaticorum binary V711 Tauri during 1998-2004.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,449(2),1380-1390.
MLA Cao DT,et al."Chromospheric activity and rotational modulation of the RS Canum Venaticorum binary V711 Tauri during 1998-2004".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 449.2(2015):1380-1390.
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