Properties of OH/IR stars with IRAS LRS spectra
文献类型：期刊论文
| 作者 | Chen PS(陈培生)1,2,3 ; Szczerba, R2,3; Kwok, S2; Volk, K2
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2001-03 |
| 卷号 | 368期号:3页码:1006-1020 |
| 关键词 | masers astronomical data bases : miscellaneous stars : AGB and post-AGB (stars :) circumstellar matter |
| ISSN号 | 0004-6361 |
| 产权排序 | 第一完成单位 |
| 通讯作者 | Szczerba, R (reprint author), Nicholas Copernicus Univ, Ctr Astron, Rabianska 8, PL-87100 Torun, Poland. |
| 英文摘要 | 1858 OH satellite line (1612 MHz) maser sources associated with the IRAS counterparts were assembled from the literature. Cross-correlation between collected OH/IR - IRAS sources and the recent catalogue of the IRAS LRS spectra (Kwok et al. 1997) allows us to subdivide 1024 of them (after excluding OH sources with uncertain IRAS associations) into 10 groups according to the Volk & Cohen (1989) classification scheme. We have found that sources with silicate emission form the largest group (about 57%), followed by the group with silicate absorption (only about 16%). For more sensitive individual OH maser surveys these numbers differentiate even more and the ratio between silicate emission and absorption sources reaches a value close to 6. Surprisingly, we found an association of OH maser emission with a small number of stars with carbon-rich atmospheres. The distribution of these subgroups of OH/IR stars in the IRAS colour-colour and the period-colour diagrams as well as histograms of some physical properties are presented. The galactic distribution of important parameters (periods, IRAS colours, expansion and stellar velocities) for different classes of OH/IR sources is analyzed from the point of view of the stars' evolutionary status. The correlations among the periods, colours, expansion and star velocities and the pumping efficiencies for selected subgroups of OH/IR stars are also investigated. These analyses allow us to demonstrate that a significant fraction of silicate emission group sources do not form an evolutionary sequence with the silicate absorption objects- as is suggested e.g. by the IRAS colour-colour diagram, but rather form a lower initial mass sequence, i.e. these sources will never develop sufficient mass loss to manifest silicate absorption. |
| 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] | OH MASER EMISSION ; CIRCUMSTELLAR DUST SHELLS ; LOW-RESOLUTION SPECTRA ; LONG-PERIOD VARIABLES ; GIANT BRANCH STARS ; 1612 MHZ SURVEY ; GALACTIC-CENTER ; PLANETARY-NEBULAE ; CARBON STARS ; HYDRODYNAMICAL MODELS |
| 收录类别 | SCI |
| 原文出处 | http://www.aanda.org/articles/aa/abs/2001/12/aah1995/aah1995.html |
| 语种 | 英语 |
| WOS记录号 | WOS:000168072400029 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/4130]  |
| 专题 | 云南天文台_其他 |
| 作者单位 | 1.Yunnan Observatory and United Laboratory of Optical Astronomy, CAS, Kunming 650011, China 2.Department of Physics and Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada 3.N. Copernicus Astronomical Center, Rabianska 8, 87-100 Torun, Poland |
| 推荐引用方式 GB/T 7714 | Chen PS,Szczerba, R,Kwok, S,et al. Properties of OH/IR stars with IRAS LRS spectra[J]. ASTRONOMY & ASTROPHYSICS,2001,368(3):1006-1020. |
| APA | Chen PS,Szczerba, R,Kwok, S,&Volk, K.(2001).Properties of OH/IR stars with IRAS LRS spectra.ASTRONOMY & ASTROPHYSICS,368(3),1006-1020. |
| MLA | Chen PS,et al."Properties of OH/IR stars with IRAS LRS spectra".ASTRONOMY & ASTROPHYSICS 368.3(2001):1006-1020. |
入库方式： OAI收割
来源：云南天文台
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