Properties of OH/IR stars with IRAS LRS spectra

doi:10.1051/0004-6361:20010098

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	Properties of OH/IR stars with IRAS LRS spectra
	Chen PS(陈培生)1,2,3 ; Szczerba, R 2,3; Kwok, S 2; Volk, K 2; Szczerba, R (reprint author), Nicholas Copernicus Univ, Ctr Astron, Rabianska 8, PL-87100 Torun, Poland.
发表期刊	ASTRONOMY & ASTROPHYSICS
	2001-03
卷号	368 期号:3 页码:1006-1020
DOI	10.1051/0004-6361:20010098
产权排序	第1完成单位
收录类别	SCI
关键词	Masers Astronomical Data Bases : Miscellaneous Stars : Agb And post-Agb (Stars :) Circumstellar Matter
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.
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-6361
URL	查看原文
归档日期	2001-04-18
WOS记录号	WOS:000168072400029
WOS研究方向	Astronomy & Astrophysics
WOS类目	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
引用统计	被引频次：42[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/4130
专题	其他
通讯作者	Szczerba, R (reprint author), Nicholas Copernicus Univ, Ctr Astron, Rabianska 8, PL-87100 Torun, Poland.
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
第一作者单位	中国科学院云南天文台
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,&Szczerba, R .(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.

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