双子座南卫星上近红外日冕照相成像仪的性能
Performance of the Near-infrared coronagraphic imager on Gemini-South
摘要：
介绍了双子座南近红外日冕成像仪（NICI）的日冕成像和自适应光学性能。NICI包括一个双通道成像器，用于同步光谱差异成像，一个专用的85元件曲率自适应光学系统，和一个内置的Lyot日冕仪。它是专门设计用于在智利双子座天文台8米望远镜上调查和成像大型太阳系外气态行星。我们提出了各个子系统的天空性能以及端到端的对比度曲线。这些相比，我们的模型预测的自适应光学系统，日冕，和光谱差成像。
英文摘要：
We present the coronagraphic and adaptive optics performance of the Gemini-South Near-Infrared Coronagraphic Imager (NICI). NICI includes a dual-channel imager for simultaneous spectral difference imaging, a dedicated 85-element curvature adaptive optics system, and a built-in Lyot coronagraph. It is specifically designed to survey for and image large extra-solar gaseous planets on the Gemini Observatory 8-meter telescope in Chile. We present the on-sky performance of the individual subsystems along with the end-to-end contrast curve. These are compared to our model predictions for the adaptive optics system, the coronagraph, and the spectral difference imaging.
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