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Chromospheric activity on late-type star LQ Hya
Zhang, LY1,2; Pi, QF1,2; Zhu, ZZ1,2; Zhang XL(张西亮)2,3; Li, ZM4
Source PublicationNEW ASTRONOMY
2014-10
Volume32Pages:1-5
DOI10.1016/j.newast.2014.02.010
Contribution Rank第3完成单位
Indexed BySCI
KeywordStars : Late Type Stars : Individual Lq Hya Stars : Chromosphere Stars : Spectroscopy
Abstract

We present new high-resolution echelle spectra of LQ Hya to study its chromospheric activity. We analyzed our spectroscopic observations including several optical indicators of chromospheric activity (the He I D-3, Na I D-1, D-2, H-alpha, and Ca II infrared triplet lines), by means of the spectral subtraction technique. All the chromospheric activity indicators (the Na I D-1, D-2, H-alpha, and Ca II IRT lines) confirmed chromospheric emissions. The ratio of EW8542/EW8498 for LQ Hya is around 1.5, which indicates that there is optically thick emission in a plage-like region. As for the Ca II IRT and H-alpha lines, it seems that there is also a weak rotation modulation of chromospheric activity in our data, which might be explained by the strong plage or flare. The contemporaneous monitoring of photospheric and chromospheric emissions for LQ Hya indicate chromospheric plages might spatially associated with the spots. (C) 2014 Elsevier B.V. All rights reserved.

Funding ProjectJoint Fund of Astronomy of the National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS)[10978010] ; Chinese Academy of Sciences (CAS)[11263001] ; Open Project Program of the Key Laboratory of Optical Astronomy ; NAOC ; CAS
Funding OrganizationJoint Fund of Astronomy of the National Natural Science Foundation of China (NSFC) ; Chinese Academy of Sciences (CAS)[10978010, 11263001] ; Open Project Program of the Key Laboratory of Optical Astronomy ; NAOC ; CAS
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
WOS IDWOS:000336874400001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordRS-CANUM-VENATICORUM ; MULTIWAVELENGTH OPTICAL OBSERVATIONS ; TIME-RESOLVED SPECTROSCOPY ; SHORT-PERIOD SYSTEMS ; H-ALPHA EMISSION ; BINARY-SYSTEMS ; MAGNETIC ACTIVITY ; URSAE MAJORIS ; AB-DORADUS ; HYDRAE
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5437
Collection丽江天文观测站(南方基地)
中国科学院天体结构与演化重点实验室
Corresponding AuthorZhang, LY
Affiliation1.College of Science/Department of Physics & NAOC-GZU-Sponsored Center for Astronomy Research, Guizhou University, Guiyang 550025, PR China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, PR China
3.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, PR China
4.Institute for Astronomy and History of Science and Technology, Dali University, Dali 671003, PR China
Recommended Citation
GB/T 7714
Zhang, LY,Pi, QF,Zhu, ZZ,et al. Chromospheric activity on late-type star LQ Hya[J]. NEW ASTRONOMY,2014,32:1-5.
APA Zhang, LY,Pi, QF,Zhu, ZZ,Zhang XL,&Li, ZM.(2014).Chromospheric activity on late-type star LQ Hya.NEW ASTRONOMY,32,1-5.
MLA Zhang, LY,et al."Chromospheric activity on late-type star LQ Hya".NEW ASTRONOMY 32(2014):1-5.
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