Irregular changes in Hαemission line of V423 Aur observed by LAMOST Medium-Resolution Spectrographs
文献类型：期刊论文
| 作者 | Wu CJ(武朝剑)1; Wu H(吴宏)1; Xia ZH(夏志浩)2; Zhang W(张伟)1; Ren JJ(任娟娟)3; Li GW(李广伟)1; Chen JJ(陈建军)1; Yang F(杨帆)1; Shi JR(施建荣)1; Hou YH(侯永辉)4 |
| 刊名 | 天文和天体物理学研究:英文版
 |
| 出版日期 | 2020 |
| 卷号 | 20.0期号:003页码:84 |
| 关键词 | stars emission-line,Be-stars variables general-stars rotation |
| ISSN号 | 1674-4527 |
| 英文摘要 | We obtained seven spectra of the Be star V423 Aur on 2017 Dec.5 using the LAMOST MediumResolution Spectrograph with exposures from 600 to 1200 seconds.These spectra show the irregular Ha emission line profile variations(LPVs).In the seven spectra,from the 4 th to 7 th,the left part of Ha profile even shows excess.However,no variation can be seen from the follow-up observation of photometry by 1.26-m telescope and High-Resolution spectra by 2.16-m telescope.According to the High-Resolution spectra,we conclude that it is a B7 V type star with E(B-V)=0.709±0.036 and its vsini is221.8 km s-1.The short-term Ha LPVs could be explained as a result of the transient ejection of matter from rotating disk or shell around V423 Aur. |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/62985]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Key Laboratory of Optical Astronomy,National Astronomical Observatories 2.State Key Laboratory of Lunar and Planetary Sciences,Macau University of Science and Technology,Taipa,Macau 3.Key Laboratory of Space Astronomy and Technology,National Astronomical Observatories,Chinese Academy of Sciences 4.中国科学院南京地理与湖泊研究所 5.中国科学院 |
| 推荐引用方式 GB/T 7714 | Wu CJ,Wu H,Xia ZH,et al. Irregular changes in Hαemission line of V423 Aur observed by LAMOST Medium-Resolution Spectrographs[J]. 天文和天体物理学研究:英文版,2020,20.0(003):84. |
| APA | 武朝剑.,吴宏.,夏志浩.,张伟.,任娟娟.,...&刘继峰.(2020).Irregular changes in Hαemission line of V423 Aur observed by LAMOST Medium-Resolution Spectrographs.天文和天体物理学研究:英文版,20.0(003),84. |
| MLA | 武朝剑,et al."Irregular changes in Hαemission line of V423 Aur observed by LAMOST Medium-Resolution Spectrographs".天文和天体物理学研究:英文版 20.0.003(2020):84. |
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来源：国家天文台
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