14 September 2010 Finding and measuring extrasolar planets using speckle statistics
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Proceedings Volume 7387, Speckle 2010: Optical Metrology; 73870Z (2010); doi: 10.1117/12.870757
Event: Speckle 2010, 2010, Florianapolis, Brazil
Abstract
The main limitation to imaging of planets outside the Solar System is the contrast ratio and small separation between the star and its companion. Quasi-static speckles produced by the telescope optics constitute the main impediment for detection of close-in sources. We propose a complete framework for the detection and first-order characterization of extrasolar planets from a sequence of compensated images. The new methods rely on the observation that statistics of intensity inside the core of a high-quality point spread function differ from the off-axis (speckle) statistics. To calculate the efficiency of our methods we derive analytical expressions for mean and standard deviation of intensity. For photometry, the difference in statistics between the on-axis and off-axis intensity is used to constrain a one-dimensional, "blind," iterative deconvolution at the position of the companion.
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Szymon Gladysz, Natalia Yaitskova, "Finding and measuring extrasolar planets using speckle statistics", Proc. SPIE 7387, Speckle 2010: Optical Metrology, 73870Z (14 September 2010); doi: 10.1117/12.870757; https://doi.org/10.1117/12.870757
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KEYWORDS
Speckle

Image segmentation

Signal to noise ratio

Telescopes

Adaptive optics

Diffraction

Point spread functions

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