Hydrogen lines in LAMOST low-resolution spectra of RR Lyrae stars
文献类型：期刊论文
| 作者 | Yang, F.1,2; Deng, L.1; Liu, C.1 ; Carlin, J. L.3; Newberg, H. Jo3; Carrell, K.1; Justham, S.1; Zhang, X.1; Bai, Z.1; Wang, F.1
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| 刊名 | NEW ASTRONOMY
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| 出版日期 | 2014 |
| 卷号 | 26页码:72-76 |
| 关键词 | Stars: variables: RR Lyrae Techniques: radial velocities Shock waves Surveys |
| 英文摘要 | The LAMOST pilot survey has produced a data release containing over 600,000 stellar spectra. By crosschecking with a large time series photometric database of RR Lyrae stars in high Galactic latitude regions, we found a total number of 157 RR Lyrae stars that have been observed with LAMOST. In this sample, we successfully captured three RR Lyrae stars in the fast expansion phase, all of them showing hypersonic shock wave features in the Balmer line region. We fit the shape of He line region and determine that the emission feature seen within the broadened He absorption line suggests hypersonic relative motion in the atmospheres of these three objects. With a further LAMOST survey of millions of stars, we plan to capture a large sample of RR Lyrae stars in their hypersonic expansion phase, and therefore provide a large database for the study of the internal structure and the pulsation mechanism of RR Lyrae stars. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000325510600007 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6630]  |
| 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.Rensselaer Polytech Inst, Dept Phys Appl Phys & Astron, Troy, NY 12180 USA 4.China West Normal Univ, Sch Phys & Elect Informat, Nanchong 637002, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, F.,Deng, L.,Liu, C.,et al. Hydrogen lines in LAMOST low-resolution spectra of RR Lyrae stars[J]. NEW ASTRONOMY,2014,26:72-76. |
| APA | Yang, F..,Deng, L..,Liu, C..,Carlin, J. L..,Newberg, H. Jo.,...&Zhao, Y..(2014).Hydrogen lines in LAMOST low-resolution spectra of RR Lyrae stars.NEW ASTRONOMY,26,72-76. |
| MLA | Yang, F.,et al."Hydrogen lines in LAMOST low-resolution spectra of RR Lyrae stars".NEW ASTRONOMY 26(2014):72-76. |
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来源：国家天文台
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