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Chromospheric activity on late-type star LQ Hya

文献类型：期刊论文

作者Zhang, LY1,2; Pi, QF1,2; Zhu, ZZ1,2; Zhang XL(张西亮)2,3; Li, ZM4
刊名NEW ASTRONOMY
出版日期2014-10
卷号32页码:1-5
关键词Stars : late type Stars : individual LQ Hya Stars : chromosphere Stars : spectroscopy
ISSN号1384-1076
产权排序第三完成单位
通讯作者Zhang, LY (reprint author), Guizhou Univ, Dept Phys, Coll Sci, Guiyang 550025, Peoples R China.
英文摘要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.
WOS标题词Science & Technology ; Physical Sciences
学科主题Astronomy & Astrophysics
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]RS-CANUM-VENATICORUM ; MULTIWAVELENGTH OPTICAL OBSERVATIONS ; TIME-RESOLVED SPECTROSCOPY ; SHORT-PERIOD SYSTEMS ; H-ALPHA EMISSION ; BINARY-SYSTEMS ; MAGNETIC ACTIVITY ; URSAE MAJORIS ; AB-DORADUS ; HYDRAE
收录类别SCI
原文出处http://www.sciencedirect.com/science/article/pii/S1384107614000384
语种英语
WOS记录号WOS:000336874400001
源URL[http://ir.ynao.ac.cn/handle/114a53/5437]  
专题云南天文台_丽江天文观测站（南方基地）
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.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
推荐引用方式
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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来源：云南天文台

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