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Chromospheric activity on late-type star DM UMa using high-resolution spectroscopic observations
Zhang, LiYun1,2; Pi, QingFeng1,2; Han, Xianming L.1,3; Chang L(常亮)2,4; Wang, Daimei1,2; Zhang, LY; Pi, QF; Han, XL
发表期刊MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2016-06-11
卷号459期号:1页码:854-862
DOI10.1093/mnras/stw668
产权排序第4完成单位
收录类别SCI
关键词Stars: Activity Binaries: Spectroscopic Stars: Chromospheres Stars: Individual: Dm uma-Stars: Late-type
摘要We present new 14 high-resolution echelle spectra to discuss the level of chromospheric activity of DM UMa in He I D-3, Na I D-1, D-2, H alpha, and Ca II infrared triplet lines (IRT). It is the first time to discover the emissions above the continuum in the He I D-3 lines on 2015 February 9 and 10. The emission on February 9 is the strongest one ever detected for DM UMa. We analysed these chromospheric active indicators by employing the spectral subtraction technique. The subtracted spectra reveal weak emissions in the Na I D-1, D-2 lines, strong emission in the Ha line, and clear excess emissions in the Ca II IRT lines. Our values for the EW8542/EW8498 ratio are on the low side, in the range of 1.0-1.7. There are also clear phase variations of the level of chromospheric activity in equivalent width (EW) light curves in these chromospheric active lines (especially the Ha line). These phenomena might be explained by flare events or rotational modulations of the level of chromospheric activity.
项目资助者National Natural Science Foundation of China (NSFC)(U1431114, 11263001) ; Chinese Academy of Sciences (CAS)(U1431114, 11263001) ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0035-8711
URL查看原文
WOS记录号WOS:000376386600065
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]RS-CANUM-VENATICORUM ; CA-II-H ; MULTIWAVELENGTH OPTICAL OBSERVATIONS ; LINE DEPTH RATIOS ; X-RAY SOURCES ; DWARF LQ HYA ; BINARY-SYSTEMS ; URSAE-MAJORIS ; CVN BINARIES ; ROTATIONAL MODULATION
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9599
专题丽江天文观测站(南方基地)
中国科学院天体结构与演化重点实验室
通讯作者Zhang, LY; Pi, QF; Han, XL
作者单位1.Department of Physics, College of Science, Guizhou University and NAOC-GZU-Sponsored Center for Astronomy, Guizhou University, Guiyang 550025, P.R. China
2.Key Laboratory for the Structure and Evolution of Celestial Objects of Yunnan Astronomical Observatories, Chinese Academy of Sciences, Kunming 650011, P.R. China
3.Department of Physics and Astronomy, Butler University, Indianapolis, IN 46208, USA
4.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, P.R. China
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Zhang, LiYun,Pi, QingFeng,Han, Xianming L.,et al. Chromospheric activity on late-type star DM UMa using high-resolution spectroscopic observations[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,459(1):854-862.
APA Zhang, LiYun.,Pi, QingFeng.,Han, Xianming L..,Chang L.,Wang, Daimei.,...&Han, XL.(2016).Chromospheric activity on late-type star DM UMa using high-resolution spectroscopic observations.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,459(1),854-862.
MLA Zhang, LiYun,et al."Chromospheric activity on late-type star DM UMa using high-resolution spectroscopic observations".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 459.1(2016):854-862.
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