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 | |
发表期刊 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
2015-05-11 | |
卷号 | 449期号:2页码:1380-1390 |
DOI | 10.1093/mnras/stv110 |
产权排序 | 第1完成单位 |
收录类别 | SCI ; EI |
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. |
资助项目 | National Natural Science Foundation of China[10373023] ; National Natural Science Foundation of China[10773027] ; National Natural Science Foundation of China[11333006] ; Chinese Academy of Sciences[KJCX2-YW-T24] |
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 | 天文学 ; 恒星与银河系 ; 恒星天文学 |
学科门类 | 理学 ; 理学::天文学 |
文章类型 | Article |
出版者 | OXFORD UNIV PRESS |
出版地 | GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND |
ISSN | 0035-8711 |
URL | 查看原文 |
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 |
EI入藏号 | 20221612001116 |
EI主题词 | Chromophores |
EI分类号 | 657.2 Extraterrestrial Physics and Stellar Phenomena - 713.4 Pulse Circuits - 804.1 Organic Compounds |
引用统计 | |
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(曹东涛) |
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 |
第一作者单位 | 中国科学院云南天文台 |
通讯作者单位 | 中国科学院云南天文台 |
推荐引用方式 GB/T 7714 | Cao DT,Gu SH. 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.(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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