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arXiv 1101.4002astro-ph.GAastro-ph.SR
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银河系O星光谱巡天。I. R~2500蓝紫色的分类系统和明亮的北半球恒星

The Galactic O-Star Spectroscopic Survey. I. Classification System and Bright Northern Stars in the Blue-Violet at R~2500

A. Sota, J. Maíz Apellániz, N. R. Walborn, E. J. Alfaro, R. H. Barbá, N. I. Morrell, R. C. Gamen, J. I. Arias

摘要:

我们提出了银河系O星的大规模光谱调查的第一部分,基于新的,高信噪比,R~2500数字观测从两个半球的银河系O星目录中选择的Maíz Apellániz等(2004)和Sota等(2008)。光谱分类系统进行了重新讨论,并提出了一个新的图集,取代以前的版本。给出了异常对象的广泛序列,包括Ofc、ON/OC、Onfp、Of?p,Oe和双线分光双星。剩余的正常光谱使第一个样本达到184颗恒星,接近B=8和delta = -20以北,包括Maíz Apellániz et al.(2004)中仍然被归类为O星的所有北方天体。由于数据和分析程序的质量、数量和同质性,这些分类的系统和随机准确性大大高于以前可达到的准确性。这些结果将促进银河系天文学和恒星天体物理学的后续研究。在未来,我们将发表调查的其余部分,从Maíz Apellániz et al.(2004)的第二篇论文开始,该论文将包括大多数南方恒星。

英文摘要:

We present the first installment of a massive spectroscopic survey of Galactic O stars, based on new, high signal-to-noise ratio, R~2500 digital observations from both hemispheres selected from the Galactic O-Star Catalog of Maíz Apellániz et al. (2004) and Sota et al. (2008). The spectral classification system is rediscussed and a new atlas is presented, which supersedes previous versions. Extensive sequences of exceptional objects are given, including types Ofc, ON/OC, Onfp, Of?p, Oe, and double-lined spectroscopic binaries. The remaining normal spectra bring this first sample to 184 stars, which is close to complete to B=8 and north of delta = -20 and includes all of the northern objects in Maíz Apellániz et al. (2004) that are still classified as O stars. The systematic and random accuracies of these classifications are substantially higher than previously attainable, because of the quality, quantity, and homogeneity of the data and analysis procedures. These results will enhance subsequent investigations in Galactic astronomy and stellar astrophysics. In the future we will publish the rest of the survey, beginning with a second paper that will include most of the southern stars in Maíz Apellániz et al. (2004).

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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