Fizeau interferometric imaging of Io volcanism with LBTI/LMIRcam
Fizeau interferometric imaging of Io volcanism with LBTI/LMIRcam
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使用 LBTI/LMIRcam 对木卫一火山活动进行斐索干涉成像
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
John C. Wilson
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作者：
J. Leisenring;P. Hinz;M. Skrutskie;A. Skemer;C. Woodward;C. Veillet;C. Arcidiacono;V. Bailey;M. Bertero;P. Boccacci;A. Conrad;K. Kleer;I. Pater;D. Defrére;J. Hill;K. Hofmann;L. Kaltenegger;A. Camera;M. Nelson;D. Schertl;J. Spencer;G. Weigelt;John C. Wilson
大型双筒望远镜（LBT）在一个共同的底座上安装了两个8.4米的镜子，相隔14.4米。通过LBT干涉仪（LBTI）将这两个AO校正孔径的相干组合产生Fizeau干涉图像，其空间分辨率相当于22.8米望远镜的空间分辨率和单个11.8米反射镜的聚光能力。利用这些独特的功能，我们使用LBTI/LMIRcam在M波段（4.8 μm）在一系列视差角上对木卫一表面火山活动的热辐射进行了成像。在木卫一的距离上，干涉测量基线的M波段分辨率对应于约135公里的物理距离，从而能够对木卫一火山活动进行高分辨率监测，例如在这一波长范围内工作的其他地面望远镜无法观测到的火山喷发和爆发。两个反卷积例程用于恢复组合图像的全部空间分辨率，解决至少16个已知的火山热点。将这些观测与先进的图像重建算法相结合，展示了斐索干涉测量的多功能性，并将LBT实现为一系列超大望远镜中的第一个。
The Large Binocular Telescope (LBT) houses two 8.4-meter mirrors separated by 14.4 meters on a common mount. Coherent combination of these two AO-corrected apertures via the LBT Interferometer (LBTI) produces Fizeau interferometric images with a spatial resolution equivalent to that of a 22.8-meter telescope and the light- gathering power of single 11.8-meter mirror. Capitalizing on these unique capabilities, we used LBTI/LMIRcam to image thermal radiation from volcanic activity on the surface of Io at M-Band (4.8 μm) over a range of parallactic angles. At the distance of Io, the M-Band resolution of the interferometric baseline corresponds to a physical distance of ~135 km, enabling high-resolution monitoring of Io volcanism such as ares and outbursts inaccessible from other ground-based telescopes operating in this wavelength regime. Two deconvolution routines are used to recover the full spatial resolution of the combined images, resolving at least sixteen known volcanic hot spots. Coupling these observations with advanced image reconstruction algorithms demonstrates the versatility of Fizeau interferometry and realizes the LBT as the first in a series of extremely large telescopes.