Forbidden line of S II lambda 6716 in the galactic emission-line background
Forbidden line of S II lambda 6716 in the galactic emission-line background
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DOI：
10.1086/163294
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发表时间：
1985-07
期刊：
影响因子：
--
通讯作者：
R. J. Reynolds
中科院分区：
文献类型：
--
作者：
R. J. Reynolds
在银河系背景中，在波长λ 6716处检测到S II的禁线，其相对于H α的强度大约是在传统H II区域中观察到的强度的四倍。这一结果是第一个强有力的证据表明，微弱的背景的发射线光谱是显着不同的H II区。这意味着来自H II区域的散射光不是背景发射的主要来源，并且产生该背景的区域内的电离/激发条件不同于传统H II区域中的条件。对H α和SII禁戒线宽的分析表明，发射气体的温度小于约20，000 K，并且各个发射区域具有通常小于约30 km/s的随机速度。19篇参考文献。
The forbidden line of S II has been detected at a wavelength lambda 6716 in the galactic background with an intensity relative to H alpha that is approximately four times higher than that observed in traditional H II regions. This result is the first strong evidence that the emission line spectrum of the faint background is significantly different from that of H II regions. It implies that scattered light from H II regions is not the dominant source of the background emission and that the ionization/excitation conditions within the regions that produce this background differ from the conditions in traditional H II regions. An analysis of the H alpha and S II forbidden line widths suggests that the emitting gas has a temperature of less than about 20,000 K and that the individual emission regions have random velocities typically less than about 30 km/s. 19 references.