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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
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2016-06-11
Volume459Issue:1Pages:854-862
DOI10.1093/mnras/stw668
Contribution Rank第4完成单位
Indexed BySCI
KeywordStars: Activity Binaries: Spectroscopic Stars: Chromospheres Stars: Individual: Dm uma-Stars: Late-type
Abstract

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.

Funding ProjectNational Natural Science Foundation of China (NSFC)[U1431114] ; National Natural Science Foundation of China (NSFC)[11263001] ; Chinese Academy of Sciences (CAS)[U1431114] ; Chinese Academy of Sciences (CAS)[11263001] ; Open Project Program of the Key Laboratory of Optical Astronomy, NAOC, CAS
Funding OrganizationNational 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
Language英语
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 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
WOS IDWOS:000376386600065
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordRS-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
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9599
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, LiYun; Pi, QingFeng; Han, Xianming L.
Affiliation1.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
Recommended Citation
GB/T 7714
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.(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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