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arXiv 0907.1033astro-ph.SRastro-ph.CO
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大麦云云中N159/N160复合物的光谱研究

Spectroscopic study of the N159/N160 complex in the Large Magellanic Cloud

Cecilia Fariña, Guillermo L. Bosch, Nidia I. Morrell, Rodolfo H. Barbá, Nolan R. Walborn

摘要:

本文对大麦云星云剑鱼座30号以南的N159/N160星云恒星形成区进行了光谱学研究,对该星云内的189颗恒星进行了分类。他们中的大多数属于O和早期B光谱类,我们也发现了一些不寻常的和非常有趣的光谱,包括成员的Onfp类,一个Be P天鹅星,和一些可能的多系统。使用光谱类型作为进化阶段的广泛指标,我们认为该地区作为一个整体的进化状态。我们推断,在不同的演化阶段的大质量恒星存在于整个地区,有利于一个共同的想法,最近在N159/N160复杂的恒星形成的起源作为一个整体,而顺序的恒星形成在不同的速度可能存在于几个分区。

英文摘要:

We present a spectroscopic study of the N159/N160 massive-star forming region south of 30 Doradus in the Large Magellanic Cloud, classifying a total of 189 stars in the field of the complex. Most of them belong to O and early B spectral classes; we have also found some uncommon and very interesting spectra, including members of the Onfp class, a Be P Cygni star, and some possible multiple systems. Using spectral types as broad indicators of evolutionary stages, we considered the evolutionary status of the region as a whole. We infer that massive stars at different evolutionary stages are present throughout the region, favoring the idea of a common time for the origin of recent star formation in the N159/N160 complex as a whole, while sequential star formation at different rates is probably present in several subregions.

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