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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
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2015-05-11
Volume449Issue:2Pages:1380-1390
DOI10.1093/mnras/stv110
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Activity Binaries: Spectroscopic Stars: Chromospheres Stars: Individual: V711 Tau Stars: Late-type
Abstract

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.

Funding ProjectNational 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]
Funding OrganizationNational Natural Science Foundation of China[10373023, 10773027, 11333006] ; Chinese Academy of Sciences[KJCX2-YW-T24]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
Archive Date2015-04-07
WOS IDWOS:000355337500018
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordMULTIWAVELENGTH 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
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6809
Collection系外行星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorCao DT(曹东涛)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
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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