Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"differential imaging"”.
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Detecting Extrasolar Planets using IFS-based Simultaneous Differential Imaging
… Optics system and analyzed with a Simultaneous Differential Imaging technique (SDI), are a powerful tool to detect and characterize planets directly; they enhance the signal of the planet and, at the same time, reduces the impact of stellar light and consequently important noise sources like …
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Novel Adaptive Optics Concepts : Wavefront Sensing with Sodium Laer Guide Stars at Extemely Large Telescopes and Simultaneous Differential Imaging
… Einsatz kommt, ist das so genannte "Simultaneous Differential Imaging (SDI)" (Simultane Differenzielle Abbildung). SDI bietet die Möglichkeit zum direkten Nachweis extrasolarer Planeten, einem der neuesten Forschungsschwerpunkte in der galaktischen Astronomie. Mit Hilfe moderner AO-Systeme …
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Enhanced physics modelling and multistatic data integration for breast tissue reconstruction in microwave radar imaging
Microwave breast imaging offers a low-cost, portable, and non-ionizing alternative for breast cancer detection by exploiting the contrast in dielectric properties between malignant and healthy tissues. Its simplicity and safety make it particularly attractive for screening in under-served or remote …
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High-resolution studies of protoplanetary disks
… (Chile) we tested the technique of Polarimetric Differential Imaging. Advances in mid-IR data reduction were achieved, e.g., a method was developed to correct the chromatic and airmass dependent extinction. We show new N-band photometry and spectra for eight pre-main sequence stars, six main …
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Exploring the Environment of Young Stars: Disks, Companions and Clusters
… 1. By applying the novel method of polarimetric differential imaging and the NACO/VLT instrument we probe one of the closest circumstellar disks in the planet-forming age at scales of our inner Solar System. 2. Our adaptive optics survey discovers six companion candidates to young stars. The most …
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Beyond the speckles: New horizons in high-contrast imaging for exoplanet science
Direct imaging of exoplanets offers a uniquely powerful way of characterizing planetary atmospheres, surface conditions, and potential biological markers beyond our solar system. However, the extreme contrast and small angular separations involved present significant observational challenges that …