The spectrum of the planetary nebula NGC 7027 from 0.9 to 2.7 microns
The spectrum of the planetary nebula NGC 7027 from 0.9 to 2.7 microns
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行星状星云 NGC 7027 的光谱从 0.9 到 2.7 微米
DOI：
10.1086/154777
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发表时间：
1976
期刊：
影响因子：
--
通讯作者：
T. Gautier
中科院分区：
文献类型：
--
作者：
R. Treffers;U. Fink;H. Larson;T. Gautier
行星状星云NGC 7027的光谱范围为0.9 ~ 2.7 .mu。探测到氢和电离氦的布拉克特系列和帕申系列的发射谱线，其强度与辐射复合理论一致。在分子氢的1-0四极谱中检测到三条谱线。四行何一，包括2 /sup 1/S/sup -/ 2 /sup 1/P线在2.058 ..亩。，已被观察到。该星云在氦主系中具有较厚的光学厚度。（P II）在1.1898的发射线的初步鉴定…也做了。(AIP)
The spectrum of the planetary nebula NGC 7027 is presented from 0.9 to 2.7 ..mu... Emission lines of the Brackett and Paschen series of hydrogen and of ionized helium have been detected, and the intensities are shown to be consistent with the theory of radiative recombination. Three lines of the 1-0 quadrupole spectrum of molecular hydrogen have been detected. Four lines of He I, including the 2 /sup 1/S/sup -/ 2 /sup 1/P line at 2.058 ..mu.., have been observed. It is concluded that the nebula is optically thick in the helium principal series. A tentative identification of an emission line in (P II) at 1.1898 ..mu.. has also been made. (AIP)