New low-resolution spectrometer spectra for IRAS sources
New low-resolution spectrometer spectra for IRAS sources
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DOI：
10.1086/191617
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发表时间：
1991-12
影响因子：
8.7
通讯作者：
K. Volk;S. Kwok;R. Stencel;E. Brugel
中科院分区：
文献类型：
--
作者：
K. Volk;S. Kwok;R. Stencel;E. Brugel
本文给出了486个红外天文点源的低分辨光谱，F亚努（12微米）在20-40焦耳/年范围内。这是对未包含在低分辨率光谱图集中的光谱进行提取和分类的努力的一部分，代表了沃尔克和科恩早期工作的扩展，该工作涵盖了F sub nu（12微米）大于40 Jy的来源。用肉眼检查了光谱，并根据光谱形态将其分为九组。将这一新的分类办法与地图集的机械分类进行了比较，并指出了差异。渐近巨星分支的富氧恒星占样本的33%。固态特征在大多数源的光谱中占主导地位。结果表明，本文提出的光谱分类方法所反映的源的性质与基于源的宽带颜色的分类方法是一致的。
Low-resolution spectra of 486 IRAS point sources with F sub nu(12 microns) in the range 20-40 Jy are presented. This is part of an effort to extract and classify spectra that were not included in the Atlas of Low-Resolution Spectra and represents an extension of the earlier work by Volk and Cohen which covers sources with F sub nu(12 microns) greater than 40 Jy. The spectra have been examined by eye and classified into nine groups based on the spectral morphology. This new classification scheme is compared with the mechanical classification of the Atlas, and the differences are noted. Oxygen-rich stars of the asymptotic giant branch make up 33 percent of the sample. Solid state features dominate the spectra of most sources. It is found that the nature of the sources as implied by the present spectral classification is consistent with the classifications based on broad-band colors of the sources.