This work enhances the spatial resolution of nearby-galaxy images with AKARI Far-infrared surveyor (FIS) via a de-convolution algorithm with a sparse modelling. The resolution of the FIS is about 80 arcsec, which is not enough to measure size of galaxies, so that AKARI/FIS has been used only for a point source analysis in galaxy studies. Hence, in this work, a de-blurring analysis with sparse modelling was performed to enhance the spatial resolution of AKARI/FIS images. The analysis was conducted to reduce an objective function with a data fidelity term, higher degree total variation, and positivity constraint. As a result, the spatial resolution was improved by about twice.
内容記述
形態: カラー図版あり
内容記述（英）
Physical characteristics: Original contains color illustrations
スパースモデリングを用いた逆畳み込みによる「あかり」遠赤外線銀河画像の高解像度化
AA1930025001.pdf
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