Assessment and Mitigation of Asteroid Impact Hazards, Josep M. Trigo-Rodriguez; Maria Gritsevich; Herber
Автор: Burbine Название: Asteroids ISBN: 1107096847 ISBN-13(EAN): 9781107096844 Издательство: Cambridge Academ Рейтинг: Цена: 11563.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: A comprehensive introduction to asteroid science, summarising the astronomical and geological characteristics of asteroids. Ideal for students, researchers and professional scientists, this accessible book covers topics including asteroid and meteorite classification, observational techniques, and past, present and future space missions.
Автор: Jakob Deller Название: Hyper-Velocity Impacts on Rubble Pile Asteroids ISBN: 3319479849 ISBN-13(EAN): 9783319479842 Издательство: Springer Рейтинг: Цена: 19564.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание:
The thesis presents a tool to create rubble pile asteroid simulants for use in numerical impact experiments, and provides evidence that the asteroid disruption threshold and the resultant fragment size distribution are sensitive to the distribution of internal voids. This thesis represents an important step towards a deeper understanding of fragmentation processes in the asteroid belt, and provides a tool to infer the interior structure of rubble pile asteroids.
Most small asteroids are 'rubble piles' – re-accumulated fragments of debris from earlier disruptive collisions. The study of fragmentation processes for rubble pile asteroids plays an essential part in understanding their collisional evolution. An important unanswered question is “what is the distribution of void space inside rubble pile asteroids?” As a result from this thesis, numerical impact experiments can now be used to link surface features to the internal structure and therefore help to answer this question.
Applying this model to asteroid ?teins, which was imaged from close range by the Rosetta spacecraft, a large hill-like structure is shown to be most likely primordial, while a catena of pits can be interpreted as evidence for the existence of fracturing of pre-existing internal voids.
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