Chromospheric activity on late-type star DM UMa using high-resolution spectroscopic observations
文献类型：期刊论文
| 作者 | Zhang, LiYun1,2 ; Pi, QingFeng1,2; Han, Xianming L.1,3; Chang L(常亮)2,4; Wang, Daimei1,2
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| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
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| 出版日期 | 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 |
| 产权排序 | 第四完成单位 |
| 通讯作者 | Zhang, LY ; Pi, QF ; Han, XL |
| 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. |
| 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 ; 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 |
| 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. |
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来源：云南天文台
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