论文标题
表征近红外的孔掩模干涉法作为天文成像的有效技术
Characterizing aperture masking interferometry in the near-infrared as an effective technique for astronomical imaging
论文作者
论文摘要
无线电干涉法是深空天文学的当前首选方法，但是在过去的几十年中，光学技术变得越来越普遍。这项研究旨在表征小尺度上近红外的孔掩模干涉法的性能。在直径变化时，装有六对孔的掩模，并在MIT华莱士天体物理天文台的24英寸望远镜中构建了分离。为28种不同的望远镜配置捕获了Spica和木星的测试图像，不同的孔径分离，孔径直径，收集波长和曝光时间。幸运成像用于说明大气扰动。通过偏置和深色框架减少每个图像，以解释传感器噪声，然后计算每个图像的最大宽度，并用作最大角度分辨率的代理。数据表明，在小尺度上，孔径大小主要控制观察到的最大角度分辨率，但需要进一步的数据来证实索赔。
Radio interferometry is the current method of choice for deep space astronomy, but in the past few decades optical techniques have become increasingly common. This research seeks to characterize the performance of aperture masking interferometry in the near-infrared at small scales. A mask containing six pairs of apertures at varying diameters and separations was constructed for use with a 24-inch telescope at the MIT Wallace Astrophysical Observatory. Test images of Spica and Jupiter were captured for 28 different telescope configurations, varying aperture separation, aperture diameter, collection wavelength, and exposure time. Lucky imaging was used to account for atmospheric perturbations. Each image was reduced via bias and dark frames to account for sensor noise, and then the full width at half maximum for each image was computed and used as a proxy for maximum angular resolution. The data imply that at small scales aperture size primarily controls the observed maximum angular resolution, but further data are required to substantiate the claim.
