Chromospheric activity on late-type star DM UMa using high-resolution spectroscopic observations

CORC > 云南天文台 > 中国科学院云南天文台 > 丽江天文观测站（南方基地）

	Chromospheric activity on late-type star DM UMa using high-resolution spectroscopic observations
	Zhang, LiYun1,2 ; Pi, QingFeng 1,2; Han, Xianming L.1,3; Chang L(常亮)2,4 ; Wang, Daimei 1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2016-06-11
卷号	459 期号:1 页码:854-862
关键词	stars: activity binaries: spectroscopic stars: chromospheres stars: individual: DM UMa-stars: late-type
ISSN号	0035-8711
通讯作者	Zhang, LY ; Pi, QF ; Han, XL
产权排序	第四完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	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
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/459/1/854
语种	英语
WOS记录号	WOS:000376386600065
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9599]
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.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
推荐引用方式 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.