Hyper Velocity Impacts On Rubble Pile Asteroids

Author : Jakob Deller
Publisher : Springer
Page : 164 pages
File Size : 54,6 Mb
Release : 2016-12-01
Category : Science
ISBN : 9783319479859

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Hyper-Velocity Impacts on Rubble Pile Asteroids by Jakob Deller Pdf

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 Šteins, 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.

Author : William Frederick Bottke
Publisher : University of Arizona Press
Page : 818 pages
File Size : 54,6 Mb
Release : 2002-01-01
Category : Science
ISBN : 0816522812

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Asteroids III by William Frederick Bottke Pdf

Two hundred years after the first asteroid was discovered, asteroids can no longer be considered mere points of light in the sky. Spacecraft missions, advanced Earth-based observation techniques, and state-of-the-art numerical models are continually revealing the detailed shapes, structures, geological properties, and orbital characteristics of these smaller denizens of our solar system. This volume brings together the latest information obtained by spacecraft combined with astronomical observations and theoretical modeling, to present our best current understanding of asteroids and the clues they reveal for the origin an,d evolution of the solar system. This collective knowledge, prepared by a team of more than one hundred international authorities on asteroids, includes new insights into asteroid-meteorite connections, possible relationships with comets, and the hazards posed by asteroids colliding with Earth. The book's contents include reports on surveys based on remote observation and summaries of physical properties; results of in situ exploration; studies of dynamical, collisional, cosmochemical, and weathering evolutionary processes; and discussions of asteroid families and the relationships between asteroids and other solar system bodies. Two previous Space Science Series volumes have established standards for research into asteroids. Asteroids III carries that tradition forward in a book that will stand as the definitive source on its subject for the next decade.

Author : M. Antonietta Barucci
Publisher : University of Arizona Press
Page : 644 pages
File Size : 49,5 Mb
Release : 2008
Category : Science
ISBN : 0816527555

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The Solar System Beyond Neptune by M. Antonietta Barucci Pdf

A new frontier in our solar system opened with the discovery of the Kuiper Belt and the extensive population of icy bodies orbiting beyond Neptune. Today the study of all of these bodies, collectively referred to as trans-Neptunian objects, reveals them to be frozen time capsules from the earliest epochs of solar system formation. This new volume in the Space Science Series, with one hundred contributing authors, offers the most detailed and up-to-date picture of our solar systemÕs farthest frontier. Our understanding of trans-Neptunian objects is rapidly evolving and currently constitutes one of the most active research fields in planetary sciences. The Solar System Beyond Neptune brings the reader to the forefront of our current understanding and points the way to further advancement in the field, making it an indispensable resource for researchers and students in planetary science.

Author : Jesús Gallego,Jaime Zamorano,Nicolás Cardiel
Publisher : Springer Science & Business Media
Page : 540 pages
File Size : 51,9 Mb
Release : 2013-06-29
Category : Science
ISBN : 9789401717786

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Highlights of Spanish Astrophysics III by Jesús Gallego,Jaime Zamorano,Nicolás Cardiel Pdf

This volume contains the Proceedings of the Fifth Scientific Meeting of the Spanish Astronomical Society (Sociedad Espanola de Astronomfa, SEA). The meeting was held at the Universidad de Castilla La Mancha in Toledo, from September 9 to 13, 2002. The event brought together 219 participants who pre sented their latest results in many different subjects. In comparison with the previous scientific meetings of the Society, the numbers of oral talks and poster contributions (122 and 64, respectively) are rapidly increasing, confirming that the SEA conferences are becoming a point of reference to assess the interests and achievements of astrophysical research in Spain. During the meeting, the SEA made public the granting of the Prize to the Best Spanish Ph. D. Thesis in As tronomy and Astrophysics for the period 2000-2001 ex aequo to Dr. A. Zurita and Dr. E. Villaver. This is the second time that the SEA is awarding this prize, which aim is to encourage young spanish astrophysicists to pursue a high level scientific career. The Society is indebted to the Universidad de Castilla La Mancha, and, in particular, to the San Pedro Martir staff, for its hospitality. It is also indebted to the Local Organizing Committee for its dedication and the good atmosphere that prevailed at any moment, and to the Scientific Organizing Committee for its excel lent work.

Author : Ingrid Mann,Akiko Nakamura,Tadashi Mukai
Publisher : Springer
Page : 329 pages
File Size : 52,9 Mb
Release : 2009-03-01
Category : Science
ISBN : 9783540769354

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Small Bodies in Planetary Systems by Ingrid Mann,Akiko Nakamura,Tadashi Mukai Pdf

The small bodies in planetary systems are indicative of the material evo- tion, the dynamical evolution, and the presence of planets in a system. Recent astronomicalresearch,spaceresearch,laboratoryresearch,andnumericals- ulationsbroughtawealthofnewandexciting?ndingsonextra-solarplanetary systems and on asteroids, comets, meteoroids, dust, and trans-Neptunian - jects in the solar system. Progress in astronomical instrumentation led to the discovery and investigation of small bodies in the outer solar system and to observations of cosmic dust in debris disks of extra-solar planetary systems. Space research allowed for close studies of some of the small solar system bodies from spacecraft. This lecture series is intended as an introduction to the latest research results and to the key issues of future research. The ch- ters are mainly based on lectures given during a recent research school and on research activities within the 21st Century COE Program “Origin and Evolution of Planetary Systems” at Kobe University, Japan. In Chap. 1, Taku Takeuchi discusses the evolution of gas and dust from protoplanetary disks to planetary disks. Using a simple model, he studies v- cous evolution and photoevaporation as possible mechanisms of gas dispersal. He further considers how the dust grows into planetesimals. Motion of dust particles induced by gas drag is described, and then using a simple analytic model, the dust growth timescale is discussed.

Author : Keisuke Sugiura
Publisher : Springer Nature
Page : 143 pages
File Size : 50,8 Mb
Release : 2020-03-17
Category : Science
ISBN : 9789811537226

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Development of a Numerical Simulation Method for Rocky Body Impacts and Theoretical Analysis of Asteroidal Shapes by Keisuke Sugiura Pdf

This book describes numerical simulations of collisions between asteroids, based on a unique numerical code developed by the author. The code accurately solves the elastic dynamic equations and describes the effects of fracture and friction, which makes it possible to investigate the shapes of impact outcomes produced by asteroid collisions and subsequent gravitational accumulation of fragments. The author parallelizes the code with high parallelization efficiency; accordingly, it can be used to conduct high-resolution simulations with the aid of supercomputers and clarify the shapes of small remnants produced through the catastrophic destruction of asteroids. The author demonstrates that flat asteroids can only be produced by impacts involving objects with similar mass and low velocity, which suggests that the flat asteroids in our solar system were created in the planet formation era and have kept their shapes until today. The author also shows that asteroid collisions under certain conditions can produce the extremely elongated shape of an interstellar minor body, 1I/‘Oumuamua. In brief, the book offers a comprehensive investigation of asteroid impacts and shapes, making it a uniquely valuable resource.

Author : M. J. S. Belton
Publisher : Cambridge University Press
Page : 448 pages
File Size : 48,7 Mb
Release : 2004-09-06
Category : Science
ISBN : 0521827647

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Mitigation of Hazardous Comets and Asteroids by M. J. S. Belton Pdf

It is known that large asteroids and comets can collide with the Earth with severe consequences. Although the chances of a collision in a person's lifetime are small, collisions are a random process and could occur at any time. This book collects the latest thoughts and ideas of scientists concerned with mitigating the threat of hazardous asteroids and comets. It reviews current knowledge of the population of potential colliders, including their numbers, locations, orbits, and how warning times might be improved. The structural properties and composition of their interiors and surfaces are reviewed, and their orbital response to the application of pulses of energy is discussed. Difficulties of operating in space near, or on the surface of, very low mass objects are examined. The book concludes with a discussion of the problems faced in communicating the nature of the impact hazard to the public.

Author : B. Bertotti,Paolo Farinella
Publisher : Springer Science & Business Media
Page : 494 pages
File Size : 45,6 Mb
Release : 2012-12-06
Category : Science
ISBN : 9789400919167

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Physics of the Earth and the Solar System by B. Bertotti,Paolo Farinella Pdf

From the reviews: ".....The book is a very good balance between theory and applications, of analysis and synthesis, keeping always the focus on the comprehension of the physics ruling our planetary system. In summary, this represents both an excellent textbook for students and a fundamental reference, and encyclopedic summary current knowledge, for researchers in the Solar System field." (Alessandro Rossi, Celestial Mechanics and Dynamical Astronomy, 2005)

Author : Klaus Goebel
Publisher : World Scientific
Page : 462 pages
File Size : 48,9 Mb
Release : 1999-07-13
Category : Electronic
ISBN : 9789814543644

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Role Of Permanent Monitoring Panels,the - Proceedings Of The International Seminar On Nuclear War And Planetary Emergen by Klaus Goebel Pdf

In the opening session the Chairman of the Seminar underlined the important role of the permanent monitoring panels with respect to the 15 planetary emergencies. A special session of the Seminar was devoted to reporting on the activity of these panels. Short papers, abstracts and transparencies in the opening session introduced the subjects of the contributions: 'Climatology and El Nino' (Nadia Pinardi, Neville Nicholls, Congbin Fu, Akimasa Sumi, William Sprigg and Llowell Wood) and 'Desertification' (Douglas Johnson, Xinmin Liu, Lennart Olsson and Norman Rosenberg). Contributions on 'Medicine & Biotechnologies' were presented by Paul Brown, Robert Will, Benardino Ghetti and Guy de The. The Theme 'Defence Against Cosmic Objects' was covered by Walter Huebner, John Remo and William Bottke; 'Water and Pollution' by Herman Bouwer, Gennady Palshin, David Rice and Paolo Ricci; and problems centered upon 'Food' by Carlo Lerici and Silvia Franceschi, 'Proliferation and Weapons of Mass Destruction' was discussed by Henning Wegener, Andrei Piontkovski, Reiner Huber, Tony Mason, Willis Stanley, Gregory Canavan and Povl Olgaard; 'Limits of Development' by Hilmar Schubert and Leonardas Kairiukstis; and 'Energy' by Stanislav Subbotin, Andrei Gagarinski and Eugeni Velikhov. T D Lee closed the Seminar by emphasizing the link between basic science and planetary emergencies.

Author : Patrick Michel,Francesca E. DeMeo,William F. Bottke
Publisher : University of Arizona Press
Page : 946 pages
File Size : 47,5 Mb
Release : 2015-12-31
Category : Science
ISBN : 9780816532131

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Asteroids IV by Patrick Michel,Francesca E. DeMeo,William F. Bottke Pdf

"More than forty chapters detail our current astronomical, compositional, geological, and geophysical knowledge of asteroids, as well as their unique physical processes and interrelationships with comets and meteorites"--Provided by publisher.

Author : John C. Brandt,Robert D. Chapman
Publisher : Cambridge University Press
Page : 478 pages
File Size : 46,8 Mb
Release : 2004-03-11
Category : Science
ISBN : 0521004667

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Introduction to Comets by John C. Brandt,Robert D. Chapman Pdf

Publisher Description

Author : Cynthia A. Belk
Publisher : Unknown
Page : 32 pages
File Size : 43,7 Mb
Release : 1997
Category : Meteoroids
ISBN : NASA:31769000528276

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Meteoroids and Orbital Debris by Cynthia A. Belk Pdf

Descriptions are presented of orbital debris source, distribution, size, lifetime, and mitigation measures.

Author : A. J. Piekutowski
Publisher : Unknown
Page : 272 pages
File Size : 44,8 Mb
Release : 1996
Category : Electronic
ISBN : NASA:31769000517527

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Formation and Description of Debris Clouds Produced by Hypervelocity Impact by A. J. Piekutowski Pdf

Author : R. Ragaini
Publisher : World Scientific
Page : 630 pages
File Size : 54,5 Mb
Release : 2011
Category : Science
ISBN : 9789814365925

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International Seminar on Nuclear War and Planetary Emergencies 43rd Session by R. Ragaini Pdf

Proceedings of a seminar focusing on planetary emergencies, followed in a multidisplinary approach since 1980 by permanent monitoring panels.

Author : Anny-Chantal Levasseur-Regourd,A. Cellino
Publisher : Unknown
Page : 146 pages
File Size : 53,5 Mb
Release : 2007
Category : Asteroids
ISBN : STANFORD:36105123880366

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Small Bodies Exploration by Anny-Chantal Levasseur-Regourd,A. Cellino Pdf