Hα Emission Stars in the Cepheus OB3 Region
Hα Emission Stars in the Cepheus OB3 Region
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仙王座 OB3 区域的 Hα 发射恒星
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
K. Ogura
中科院分区：
文献类型：
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作者：
T. Mikami;K. Ogura
利用物镜-棱镜施密特板在覆盖仙王座OB3星群的36°2天空区域内搜索Hα发射天体。已经发现了108颗发射星，其中68颗是我们所知的新发现。用α发射星识别出的IRAS点源的性质表明，大部分α发射星是金牛座T星或相关天体。与IRAS源相关的h α发射星与非相关的h α发射星具有不同的分布，表明它们之间存在年龄序列。总的来说，它们呈现出环状或壳状的表面分布，这与加热尘埃的分布基本一致，而且这些分布似乎被HI壳所包围。
Hα emission objects were searched for, using the objective-prismSchmidt plates in a 36 deg2 sky area covering the Cepheus OB3 association.Hundred and eight emission stars have been found, 68 of which are newfindings to our knowledge. The properties of the IRAS point sourcesidentified with Hα emission stars indicate that most of theHα emission stars are T Tauri stars or related objects. Hαemission stars associated with IRAS sources and those unassociated havedifferent distributions, suggesting an age sequence among them.Altogether, they show a ring- or shell-like surface distribution, whichalmost coincides with that of heated dusts, and these distributionsappear to be encompassed by an HI shell.