Background and First Results from the New AAO/UKST Hα Survey
Background and First Results from the New AAO/UKST Hα Survey
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新 AAO/UKST Hα 调查的背景和初步结果
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
S. Phillipps
中科院分区：
文献类型：
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作者：
Q. Parker;S. Phillipps
英澳天文台（AAO）的英国施密特望远镜（UKST）刚刚开始了一项新的Hα观测，它使用了一种专门设计的、高规格的单片干涉滤光片，对南银道面、麦哲伦云和选定的区域进行了观测。它可能是天文学中最大的。它与柯达Tech Pan胶片乳剂结合使用。该乳剂不仅在Hα处有一个有用的感光峰，而且具有极细的颗粒和极高的DQE（> 10%）。这导致了出色的成像，灵敏度和低噪音。很明显，CCD还不能与UKST/Tech Pan组合进行这样的调查的广域覆盖、均匀性和分辨率相匹配。这项调查最初将包括大约233个银河平面和40个麦哲伦云场，中心为4度，将需要大约3年的时间才能完成。一些初步的图像，从新的调查，并与最好的以前从UKST。第一次调查的发现，新解决银河系行星状星云的例子，也给出了。这项调查将有一个前所未有的组合面积覆盖面，深度和分辨率，优于任何以前的光学调查电离气体在银河系上级。许多新的发现和研究途径是值得期待的。
Abstract The UK Schmidt Telescope (UKST) of the Anglo-Australian Observatory (AAO) has just embarked on a new Hα survey of the Southern Galactic Plane, Magellanic Clouds and selected regions using a specially designed, high-specification, monolithic, interference filter. It is probably the largest of its kind for astronomy. It is being used in combination with Kodak Tech Pan film-based emulsion. This emulsion not only has a useful sensitivity peak at Hα but also possesses extremely fine grain and an exceptionally high DQE for the hypersensitised product (∼10%). This leads to excellent imaging, sensitivity and low noise. It is clear that CCDs cannot yet match the wide-area coverage, uniformity and resolution of the UKST/Tech Pan combination for undertaking such a survey. The survey will initially include about 233 Galactic Plane and 40 Magellanic Cloud fields on 4-degree centres and will take about 3 years to complete. Some preliminary images from the new survey are presented and compared with the best previously available from the UKST. Examples of the first survey discoveries, new resolved Galactic planetary nebulae, are also given. This survey will have an unprecedented combination of area coverage, depth and resolution, superior to those of any previous optical survey of ionised gas in the Galaxy. Many new discoveries and research avenues are expected.