A Catalog of 45,206 Hα Emission-line Stars from LAMOST MRS DR7
文献类型：期刊论文
| 作者 | Yu, Lihuan3,4; Li, Jiangdan3; Wang, Jinliang1,5; He, Tongyu2,3; Han, Zhanwen3,4 |
| 刊名 | ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
 |
| 出版日期 | 2025-12-01 |
| 卷号 | 281期号:2页码:12 |
| ISSN号 | 0067-0049 |
| DOI | 10.3847/1538-4365/ae1a87 |
| 通讯作者 | Yu, Lihuan(yulihuan@ynao.an.cn) |
| 英文摘要 | Stars that exhibit prominent emission lines in their spectra are referred to as emission-line stars, encompassing a wide range of stellar types and indicative of intriguing physical properties. The Large Sky Area Multi-Object fiber Spectroscopic Telescope (LAMOST) has released millions of spectra from its Medium-Resolution Survey (MRS). A small fraction of these spectra exhibit emission lines, yet they remain undiscovered and unanalyzed due to being buried in the vast dataset. We have developed a method based on derivative spectroscopy, which provides a novel approach for detecting and identifying emission-line stars by extracting signals from complex backgrounds and estimating spectral line profiles. Applying this method to the H alpha spectral line profiles from the LAMOST-MRS Data Release 7, we compiled a catalog of emission-line stars using the second- and third-derivative spectra for automated peak detection. This approach also facilitates the classification of H alpha emission-line morphologies through a simplified scheme. The catalog comprises 56,649 spectra with relatively prominent H alpha emission lines from 45,206 unique stars, with each emission-line component accompanied by approximate estimates of its wavelength, amplitude, and width. All H alpha spectral lines were classified into three morphological classes under a unified classification scheme: single emission peak (83.0%), double emission peaks (5.6%), and P Cygni-type profiles (11.5%), which encompass both P Cygni and inverse P Cygni features. Through cross-referencing with SIMBAD, 39,497 stars represent new emission-line sources discovered in our research. |
| WOS关键词 | STELLAR RADIAL-VELOCITIES ; VARIABLE-STARS ; CLASSIFICATION ; VARIABILITY ; BINARIES ; OBJECTS ; GAIA ; I. ; ROTATION ; ORION |
| 资助项目 | The National Natural Science Foundation of China and the Chinese Academy of Sciences[U1831125] ; The Research Program of Frontier Sciences[QYZDY-SSW-SLH007] ; The Yunnan Fundamental Research Projects[202101AV070001] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; The National Key Research and Development Program of China[2021YFA1600401/3] ; China Manned Space Project[CMS-CSST-2021-A10] ; The National Nature Science Foundation of China[12288102] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001636286100001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | The National Natural Science Foundation of China and the Chinese Academy of Sciences ; The Research Program of Frontier Sciences ; The Yunnan Fundamental Research Projects ; International Centre of Supernovae, Yunnan Key Laboratory ; The National Key Research and Development Program of China ; China Manned Space Project ; The National Nature Science Foundation of China |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28840]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 通讯作者 | Yu, Lihuan |
| 作者单位 | 1.Hunan Engn Univ, Sch Computat Sci & Elect, Xiangtan 411104, Peoples R China 2.Hebei Univ, Coll Phys Sci & Technol, Baoding 071002, Peoples R China 3.Chinese Acad Sci, Int Ctr Supernovae ICESUN, Yunnan Key Lab Supernova Res, Yunnan Observ, Kunming 650216, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Lihuan,Li, Jiangdan,Wang, Jinliang,et al. A Catalog of 45,206 Hα Emission-line Stars from LAMOST MRS DR7[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2025,281(2):12. |
| APA | Yu, Lihuan,Li, Jiangdan,Wang, Jinliang,He, Tongyu,&Han, Zhanwen.(2025).A Catalog of 45,206 Hα Emission-line Stars from LAMOST MRS DR7.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,281(2),12. |
| MLA | Yu, Lihuan,et al."A Catalog of 45,206 Hα Emission-line Stars from LAMOST MRS DR7".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 281.2(2025):12. |
入库方式： OAI收割
来源：云南天文台
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