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Theses

Exploration de la ceinture de Kuiper par occultations stellaires

Abstract : It is understood that the objects from the Kuiper belt (or Trans-Neptunian Objects, « TNOs »), are remnants from the planetesimal disk, thus, they carry very important information on the solar system past evolution. The number of known TNOs (a thousand) is rapidly increasing thanks to large scale surveys. The biggest bodies reach diameters of about 2000 km. The smallest objects (< a few km) are invisible. The only way to detect these small bodies is by looking for stellar occultations. This is also a powerful tool for the study/detection of atmospheres, satellites, rings, around known TNOs. My thesis work has got various aspects : - a search of rings and satellites of Pluto using stellar occultations; - a search of small TNOs using stellar occultations and ULTRACAM; - the development of a statistical target star selection method, for the search of small TNOs; - a contribution to an instrumental project : MIOSOTYS (Multi-object Instrument for Occultations in the SOlar system and TransitorY Systems), dedicated to multi objects fast photometry; - the preparation and organization of MIOSOTYS campaign for the search of TNOs, with the development of automatic software for the search of stellar fields, data reduction and data visualization.
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Yannick Boissel. Exploration de la ceinture de Kuiper par occultations stellaires. Astrophysique [astro-ph]. Observatoire de Paris, 2010. Français. ⟨tel-01958545⟩

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