A search for diffuse interstellar bands in the ultraviolet
A search for diffuse interstellar bands in the ultraviolet
复制标题
寻找紫外线中弥漫的星际带
DOI：
10.1086/163392
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
T. Snow
中科院分区：
文献类型：
--
作者：
C. Seab;T. Snow
国际紫外线探测器（IUE）卫星被用来收集58条中度变红视线的星际消光曲线。背景星的光谱类型从O 7到A0。所有的光度等级都有代表，但主要是早期的B主序星。E（B-V）红化值范围为0.14至1.13马格，平均为0.63马格。这些消光曲线，少一些10曲线判断质量较低，共同加入，以减少随机和固定模式的仪器噪声。对所得的平均曲线进行了检查，以寻找小尺度结构的证据，结果是否定的。发现2-sigma极限对于1150 A和2000 A之间的波长为0.09 mag，对于2000 A和2300 A之间的波长为0.16 mag。由于弱恒星线的失配误差，这些结果不太可能有太大的改进。这些负面结果的影响进行了讨论，特别是参考MgO理论的星际晶粒和扩散带。41篇参考文献。
The International Ultraviolet Explorer (IUE) Satellite was used to collect interstellar extinction curves for 58 moderately reddened lines of sight. Spectral types of the background stars ranged from O7 to A0. All luminosity classes are represented, but early B main-sequence stars predominate. E(B-V) reddening values ranged from 0.14 to 1.13 mag, with an average of 0.63 mag. These extinction curves, less some 10 curves judged of lower quality, were co-added in order to reduce the random and fixed-pattern noise of the instrument. The resulting averaged curve was examined for evidence of small-scale structure, with negative results. The 2-sigma limits were found to be 0.09 mag for wavelengths between 1150 A and 2000 A, and 0.16 mag for wavelengths between 2000 A and 2300 A. Because of mismatch errors in weak stellar lines, it is unlikely that much improvement in these results is possible. The implications of these negative results are discussed with particular reference to the MgO theory of interstellar grains and diffuse bands. 41 references.