A Medium Resolution Near-Infrared Spectral Atlas of O and Early-B Stars
A Medium Resolution Near-Infrared Spectral Atlas of O and Early-B Stars
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DOI：
10.1086/444363
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发表时间：
2005-06
期刊：
影响因子：
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通讯作者：
Margaret M. Hanson;Margaret M. Hanson;R. Kudritzki;M. Kenworthy;M. Kenworthy;J. Puls;Alan T. Tokunaga
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文献类型：
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作者：
Margaret M. Hanson;Margaret M. Hanson;R. Kudritzki;M. Kenworthy;M. Kenworthy;J. Puls;Alan T. Tokunaga
我们提供了37颗光学可见星的中分辨率（R ~ 8000- 12000）高信噪比（S/N）H-和K-波段光谱，光谱类型从O3到B3，代表了大多数光度类别。当与复杂的大气模型代码结合使用时，这种质量的光谱可以用来约束OB星的温度、光度和一般风的性质。最重要的是需要中等高分辨率（R ≥ 5000）和非常高的信噪比（S/N ≥ 150）光谱进行有意义的谱分析。当使用近红外光谱进行分类系统时，仍然需要中等高的信噪比（S/N ~ 100），尽管分辨率可以放宽到1000或2000。在附录中，我们提供了一组非常高质量的近红外光谱的Brackett线在六个早A矮星。这些可以用来帮助在建模和删除这些线时，早期A矮星被用于大地光谱标准。
We present intermediate-resolution (R ~ 8000-12,000) high signal-to-noise (S/N) H- and K-band spectroscopy of a sample of 37 optically visible stars, ranging in spectral type from O3 to B3 and representing most luminosity classes. Spectra of this quality can be used to constrain the temperature, luminosity, and general wind properties of OB stars, when used in conjunction with sophisticated atmospheric model codes. Most important is the need for moderately high resolutions (R ≥ 5000) and very high signal-to-noise (S/N ≥ 150) spectra for a meaningful profile analysis. When using near-infrared spectra for a classification system, moderately high signal-to-noise (S/N ~ 100) is still required, though the resolution can be relaxed to just a thousand or two. In the Appendix we provide a set of very high-quality near-infrared spectra of Brackett lines in six early-A dwarfs. These can be used to aid in the modeling and removal of such lines when early-A dwarfs are used for telluric spectroscopic standards.