Metallic line profiles of the AO V star Vega
Metallic line profiles of the AO V star Vega
复制标题
AO V 星织女星的金属线轮廓
DOI：
10.1086/170577
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
J. M. Fletcher
中科院分区：
文献类型：
--
作者：
A. F. Gulliver;S. Adelman;C. Cowley;J. M. Fletcher
用1.2米望远镜的Coude摄谱仪获得织女星的高色散双折射信噪比Reticon谱。在3825 - 5435的光谱范围内，平均信噪比为2500。线轮廓的检查证实存在两种不同类型的轮廓，这是以前看到的IIIaJ和较低的信噪比Reticon光谱。强线的轮廓基本上是具有增强翼的经典旋转轮廓，其比预期的略强，而弱线的轮廓明显是平底的，导致梯形外观。一些可能的理论解释。
High dispersion ultrahigh signal to noise Reticon spectra of Vega were obtained with the coude spectrograph of the 1.2 m telescope. A mean signal to noise ratio of 2500 over the spectral region lambdas from 3825 to 5435 was achieved. Examination of the line profiles confirmed the presence of two different types of profiles which were previously seen in IIIaJ and lower signal to noise Reticon spectra. The profiles of the strong lines are essentially classical rotational profiles with enhanced wings which are slightly stronger than expected while those of weak lines are clearly flat-bottomed resulting in a trapezoidal appearance. A few possible theoretical explanations are presented.