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 8 of 8 for “"Debris Disks"”.
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The Structure of Extrasolar Planetesimal Belts in Images
… belts that population this region, known as debris disks. As planets dynamically interact with the disk throughout their formation and evolution, structures reflecting their history are imprinted on the disk. In this thesis, I develop systematic and unbiased methods to recover the …
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Planetary Systems in Polarized Light: Debris Disk Observations and Instrumentation
… observations can be useful for imaging debris disks and characterizing exoplanet atmospheres. With that in mind, this thesis has been constructed with two main aspects: i) observational studies of two debris disk systems, Beta Pic and HD 157587, using the Gemini Planet Imager and ii) the …
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Dust in circumstellar disks
… distribution of dust particles in circumstellar disks. Using millimetre interferometric observations of optically thick disks around T Tauri stars, I provide conclusive evidence for the presence of millimetre- to centimetre-sized dust aggregates. These findings demonstrate that dust grain growth …
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Probing planetary system histories via observations, experiments, and modelling of circumstellar gas and dust
Circumstellar disks of gas and dust are integral parts of planetary systems from formation to maturation. Protoplanetary disks, the name for circumstellar material at the earliest stages of a stellar lifetime, provide key information about the formation processes of planets, and therefore of the …
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Cool white dwarfs and the age of the galaxy
… are waiting to be discovered, the existence of debris disks around several white dwarfs suggest that planets may exist around white dwarfs. Planets in previously stable orbits around a star undergoing mass loss may become unstable, and some of these systems may result in close encounters which …
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Characterizing sub-mm observations of protoplanetary disks at super-resolution scales
… from their formation in protoplanetary disks and continued growth in debris disks to their dynamical evolution in exoplanetary systems and ultimate accretion onto white dwarfs. Measurements in each of these eras can be used to inform study in the others. Interferometry affords the …
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Reducing the Compositional and Structural Degeneracy of Planetary Interiors
… WD planets that are formed in WD debris disks under a more clement radiation environment can be distinguished by the presence of a hydrogen-dominated atmosphere. Additionally, the interior conditions of second-generation WD planets can be inferred from WD pollution observations.
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High-resolution studies of exoplanetesimal belt formation and evolution
… detectable levels of dust and gas, known as debris discs, around 20% of main sequence stars. Despite the ubiquity of planets and planetesimal belt detections, these appear quite unlike the planetary system around our Sun. In my thesis, I explore how this planetary system diversity arises, …