Recurrence quantification analysis as a post-processing technique in adaptive optics high-contrast imaging
arXiv:1810.00714 · doi:10.3847/1538-4357/aae58e
Abstract
In this work we explore the possibility of using Recurrence Quantification Analysis (RQA) in astronomical high-contrast imaging to statistically discriminate the signal of faint objects from speckle noise. To this end, we tested RQA on a sequence of high frame rate (1 kHz) images acquired with the SHARK-VIS forerunner at the Large Binocular Telescope. Our tests show promising results in terms of detection contrasts at angular separations as small as mas, especially when RQA is applied to a very short sequence of data ( s). These results are discussed in light of possible science applications and with respect to other techniques like, for example, Angular Differential Imaging and Speckle-Free Imaging.
arXiv comment12 pages, 9 figures, Accepted for publication in ApJ
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