A catalog of early-type emission-line stars and H alpha line profiles from LAMOST DR2
文献类型：期刊论文
| 作者 | Hou, Wen1,2 ; Luo, A-Li1,2; Hu, Jing-Yao1; Yang, Hai-Feng1,2,3; Du, Chang-De1,2; Liu, Chao1; Lee, Chien-De4; Lin, Chien-Cheng5; Wang, Yue-Fei6; Zhang, Yong6
|
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2016-09-01 |
| 卷号 | 16期号:9 |
| 关键词 | stars: early-type stars: emission-line, Be stars: pre-main sequence binaries: close |
| 英文摘要 | We present a catalog including 11 204 spectra of 10 436 early-type emission-line stars from LAMOST DR2, among which 9752 early-type emission-line spectra are newly discovered. For these early type emission-line stars, we discuss the morphological and physical properties of their low-resolution spectra. In this spectral sample, the H alpha emission profiles display a wide variety of shapes. Based on the H alpha line profiles, these spectra are categorized into five distinct classes: single-peak emission, single-peak emission in absorption, double-peak emission, double-peak emission in absorption, and P-Cygni profiles. To better understand what causes the H alpha line profiles, we divide these objects into four types from the perspective of physical classification, which include classical Be stars, Herbig Ae/Be stars, close binaries and spectra contaminated by H (II) regions. The majority of Herbig Ae/Be stars and classical Be stars are identified and separated using a (H-K, K-W1) color-color diagram. We also discuss 31 binary systems that are listed in the SIMBAD on-line catalog and identify 3600 spectra contaminated by H (II) regions after cross-matching with positions in the Dubout-Crillon catalog. A statistical analysis of line profiles versus classifications is then conducted in order to understand the distribution of H alpha profiles for each type in our sample. Finally, we also provide a table of 172 spectra with Fe (II) emission lines and roughly calculate stellar wind velocities for seven spectra with P-Cygni profiles. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | HERBIG-AE/BE STARS ; M IR-EXCESS ; DATA RELEASE ; B STARS ; SPECTROSCOPY ; BALMER ; 2MASS ; DISKS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000385995800006 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6895]  |
| 专题 | 国家天文台_光学天文研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Taiyuan Univ Sci & Technol, Sch Comp Sci & Technol, Taiyuan 030024, Peoples R China 4.Natl Cent Univ, Inst Astron, Jhongli, Taiwan 5.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 6.Chinese Acad Sci, Natl Astron Observ, Nanjing Inst Astron Opt & Technol, Nanjing 210042, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hou, Wen,Luo, A-Li,Hu, Jing-Yao,et al. A catalog of early-type emission-line stars and H alpha line profiles from LAMOST DR2[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2016,16(9). |
| APA | Hou, Wen.,Luo, A-Li.,Hu, Jing-Yao.,Yang, Hai-Feng.,Du, Chang-De.,...&Hou, Yong-Hui.(2016).A catalog of early-type emission-line stars and H alpha line profiles from LAMOST DR2.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,16(9). |
| MLA | Hou, Wen,et al."A catalog of early-type emission-line stars and H alpha line profiles from LAMOST DR2".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 16.9(2016). |
入库方式： OAI收割
来源：国家天文台
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。