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Ejecta emplacement and modes of formation of martian fluidized ejecta craters
Icarus, 1981From an analysis of 1173 craters possessing single (type 1) and double (type 2) concentric ejecta deposits, type 2 craters are found to occur most frequently in areas that have also been described as possessing periglacial features. The frequency of occurrence of central peaks and wall failure (terraces plus scallops) within the craters indicates that,
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Journal of Dynamic Behavior of Materials, 2017
We present a Richtmyer–Meshkov instability based model for the ejected mass per unit area produced when a shockwave impinges upon a free surface with specified surface roughness amplitude and wavelength. The model is valid for sinusoidal and non-sinusoidal surface profiles and for multiple shocks, and is readily implemented in hydrodynamic computer ...
J. E. Hammerberg +7 more
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We present a Richtmyer–Meshkov instability based model for the ejected mass per unit area produced when a shockwave impinges upon a free surface with specified surface roughness amplitude and wavelength. The model is valid for sinusoidal and non-sinusoidal surface profiles and for multiple shocks, and is readily implemented in hydrodynamic computer ...
J. E. Hammerberg +7 more
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Icarus, 2012
A significant portion of the Solar System's population of minor bodies may be quite porous. A unique aspect of crater formation in porous bodies is that large craters may form without the ejecta deposits that are associated with craters on less porous bodies. In this paper. laboratory experiments and scaling theories are used to identify the conditions
Keith A. Holsapple +2 more
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A significant portion of the Solar System's population of minor bodies may be quite porous. A unique aspect of crater formation in porous bodies is that large craters may form without the ejecta deposits that are associated with craters on less porous bodies. In this paper. laboratory experiments and scaling theories are used to identify the conditions
Keith A. Holsapple +2 more
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2012
η Carinae is surrounded by a complex circumstellar nebula ejected during more than one eruption, the great eruption in the 1840s and the second or lesser eruption in the 1890s. Beyond the well-defined edges of its famous bipolar nebula are additional nebulous features and ejecta referred to as the outer ejecta.
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η Carinae is surrounded by a complex circumstellar nebula ejected during more than one eruption, the great eruption in the 1840s and the second or lesser eruption in the 1890s. Beyond the well-defined edges of its famous bipolar nebula are additional nebulous features and ejecta referred to as the outer ejecta.
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Nature, 1988
Discussion autour des consequences de l'observation de l'emission de lumiere par la matiere ejectee lors de l'explosion de SN 1987A; en particulier on s'interesse a la facon de trier l'information concernant l'explosion elle-meme de celle de l'etoile ...
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Discussion autour des consequences de l'observation de l'emission de lumiere par la matiere ejectee lors de l'explosion de SN 1987A; en particulier on s'interesse a la facon de trier l'information concernant l'explosion elle-meme de celle de l'etoile ...
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Ejecta Sizing for Middle Gust Test Series and a Review of Ejecta Dynamics.
1976Abstract : In-flight of crater ejecta are summarized for the MIDDLE GUST test series. Observed distributions tend to support power law distribution currently used in models when the latter are filtered by gravitational and acrodynamic effects. The feasibility of obtaining data on ejecta dynamics to correlate with cratering calculations is reviewed ...
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