CHROMOSPHERIC ACTIVITY AND ROTATIONAL MODULATION ON THE YOUNG, SINGLE K2 DWARF LQ Hya
文献类型：期刊论文
| 作者 | Cao DT(曹东涛)1,2 ; Gu SH(顾盛宏)1,2
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| 刊名 | ASTRONOMICAL JOURNAL
 |
| 出版日期 | 2014-02 |
| 卷号 | 147期号:2 |
| 关键词 | stars: activity stars: chromospheres stars: individual (LQ Hya) stars: rotation |
| ISSN号 | 0004-6256 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Cao, DT (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China. |
| 英文摘要 | High-resolution echelle spectra of LQ Hya, obtained during several observing runs from 2006 to 2012, have been analyzed to study its chromospheric activity. Using the spectral subtraction technique, we derived information about chromospheric activity of LQ Hya from several optical chromospheric activity indicators (including the H-beta, He I D-3, Na I D-1, D-2, H alpha, and Ca II infrared triplet (IRT) lines). No optical flares were found during our observations. The equivalent widths (EWs) of the excess emissions in the chromospheric activity lines have been measured. The ratios of EW8542/EW8498 are generally small, which indicates that the Ca II IRT emission arises from plage-like regions, while the EH alpha/EH beta values suggest that the emission of the Balmer lines is due to both plage and prominence structures for the observations in 2012. We find that clear rotational modulation of chromospheric emission exists, which suggests the presence and change of chromospheric active regions over the surface of LQ Hya. Moreover, the active regions were associated with the photospheric spots in spatial structure. |
| 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] | MULTIWAVELENGTH OPTICAL OBSERVATIONS ; STELLAR SURFACE-STRUCTURE ; RS-CANUM-VENATICORUM ; H-ALPHA EMISSION ; BINARY-SYSTEMS ; PHYSICAL-PROPERTIES ; CLOSE BINARIES ; LINE-PROFILES ; AB-DORADUS ; HYDRAE |
| 收录类别 | SCI |
| 原文出处 | http://iopscience.iop.org/article/10.1088/0004-6256/147/2/38/meta |
| 语种 | 英语 |
| WOS记录号 | WOS:000329837100014 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/6803]  |
| 专题 | 云南天文台_系外行星研究组 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.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Cao DT,Gu SH. CHROMOSPHERIC ACTIVITY AND ROTATIONAL MODULATION ON THE YOUNG, SINGLE K2 DWARF LQ Hya[J]. ASTRONOMICAL JOURNAL,2014,147(2). |
| APA | Cao DT,&Gu SH.(2014).CHROMOSPHERIC ACTIVITY AND ROTATIONAL MODULATION ON THE YOUNG, SINGLE K2 DWARF LQ Hya.ASTRONOMICAL JOURNAL,147(2). |
| MLA | Cao DT,et al."CHROMOSPHERIC ACTIVITY AND ROTATIONAL MODULATION ON THE YOUNG, SINGLE K2 DWARF LQ Hya".ASTRONOMICAL JOURNAL 147.2(2014). |
入库方式： OAI收割
来源：云南天文台
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