Matches in SemOpenAlex for { <https://semopenalex.org/work/W147343304> ?p ?o ?g. }
Showing items 1 to 79 of
79
with 100 items per page.
- W147343304 abstract "The impact of the fragmented comet Shoemaker-Levy 9 (SL9) into Jupiter this July promises to change our understanding of the outer solar system. More than twenty mountain-sized conglomerates of ice and rock will hit the atmosphere at approx. 50 km/s over the course of a week beginning July 16, releasing approx. 10(exp 4) to 10(exp8) megatons of energy per burst, and providing unique and perhaps pivotal clues to the properties of comets and the physics of massive atmospheres. Because the fragments will strike the far side of Jupiter, data acquisition, analysis and interpretation will be quite sensitive to the actual size and energy of the fragments. We therefore examine an event which took place two summers ago, unnoticed and unobserved: the disruption of SL9 into a string of pearls' as it passed within the Roche limit at perijove. We first demonstrate, on the basis of timescales of tidal interaction, that the comet could not have broken into 20+ fragments through a hierarchy of brittle fracture events. Next, noting that the tidal stress was too weak to have even fragmented an uncompressed mass of freshly fallen snow, we run models for a strengthless comet held together only by self-gravity. We explore the initial size, density, and rotation. We conclude that a 4 km diameter comet (smaller if a prograde rotator) of density approx. 0.5 g/cu cm disrupts and disperses into a chain of fragments similar to Shoemaker-Levy 9, whether we begin with 21, 85, 169, 700 or 2000 sub-grains. Gravitational reaccumulation is evidently the answer, and there is no need to invoke the presence of 21 cometesimals as the subscale of the comet. To explain how a comet can be weaker than uncompacted snow, we show that the ring-plane crossing prior to perijove could have caused total damage. Finally, we compute the tidal stress on impactors as they approach Jupiter this July. Objects of various density are moderately distorted but not disrupted by the time they strike the planet." @default.
- W147343304 created "2016-06-24" @default.
- W147343304 creator A5008637582 @default.
- W147343304 creator A5063387071 @default.
- W147343304 creator A5089307574 @default.
- W147343304 date "1994-01-01" @default.
- W147343304 modified "2023-09-27" @default.
- W147343304 title "The Disruption and Demise of Periodic Comet Shoemaker-Levy 9" @default.
- W147343304 hasPublicationYear "1994" @default.
- W147343304 type Work @default.
- W147343304 sameAs 147343304 @default.
- W147343304 citedByCount "0" @default.
- W147343304 crossrefType "journal-article" @default.
- W147343304 hasAuthorship W147343304A5008637582 @default.
- W147343304 hasAuthorship W147343304A5063387071 @default.
- W147343304 hasAuthorship W147343304A5089307574 @default.
- W147343304 hasConcept C106125477 @default.
- W147343304 hasConcept C118873486 @default.
- W147343304 hasConcept C121332964 @default.
- W147343304 hasConcept C127313418 @default.
- W147343304 hasConcept C1276947 @default.
- W147343304 hasConcept C153294291 @default.
- W147343304 hasConcept C17744445 @default.
- W147343304 hasConcept C177871831 @default.
- W147343304 hasConcept C199539241 @default.
- W147343304 hasConcept C22268893 @default.
- W147343304 hasConcept C2777720223 @default.
- W147343304 hasConcept C44870925 @default.
- W147343304 hasConcept C511503438 @default.
- W147343304 hasConcept C51244244 @default.
- W147343304 hasConcept C539450922 @default.
- W147343304 hasConcept C65440619 @default.
- W147343304 hasConcept C87355193 @default.
- W147343304 hasConcept C94081185 @default.
- W147343304 hasConceptScore W147343304C106125477 @default.
- W147343304 hasConceptScore W147343304C118873486 @default.
- W147343304 hasConceptScore W147343304C121332964 @default.
- W147343304 hasConceptScore W147343304C127313418 @default.
- W147343304 hasConceptScore W147343304C1276947 @default.
- W147343304 hasConceptScore W147343304C153294291 @default.
- W147343304 hasConceptScore W147343304C17744445 @default.
- W147343304 hasConceptScore W147343304C177871831 @default.
- W147343304 hasConceptScore W147343304C199539241 @default.
- W147343304 hasConceptScore W147343304C22268893 @default.
- W147343304 hasConceptScore W147343304C2777720223 @default.
- W147343304 hasConceptScore W147343304C44870925 @default.
- W147343304 hasConceptScore W147343304C511503438 @default.
- W147343304 hasConceptScore W147343304C51244244 @default.
- W147343304 hasConceptScore W147343304C539450922 @default.
- W147343304 hasConceptScore W147343304C65440619 @default.
- W147343304 hasConceptScore W147343304C87355193 @default.
- W147343304 hasConceptScore W147343304C94081185 @default.
- W147343304 hasLocation W1473433041 @default.
- W147343304 hasOpenAccess W147343304 @default.
- W147343304 hasPrimaryLocation W1473433041 @default.
- W147343304 hasRelatedWork W1501198839 @default.
- W147343304 hasRelatedWork W1526501083 @default.
- W147343304 hasRelatedWork W1565051204 @default.
- W147343304 hasRelatedWork W1993399064 @default.
- W147343304 hasRelatedWork W1995293033 @default.
- W147343304 hasRelatedWork W2024830004 @default.
- W147343304 hasRelatedWork W2026634386 @default.
- W147343304 hasRelatedWork W2031404237 @default.
- W147343304 hasRelatedWork W2046003845 @default.
- W147343304 hasRelatedWork W2079238570 @default.
- W147343304 hasRelatedWork W2098132378 @default.
- W147343304 hasRelatedWork W2156205401 @default.
- W147343304 hasRelatedWork W2170115546 @default.
- W147343304 hasRelatedWork W2171815096 @default.
- W147343304 hasRelatedWork W3099989743 @default.
- W147343304 hasRelatedWork W3179120825 @default.
- W147343304 hasRelatedWork W610589022 @default.
- W147343304 hasRelatedWork W765381785 @default.
- W147343304 hasRelatedWork W1638744186 @default.
- W147343304 hasRelatedWork W2739792190 @default.
- W147343304 isParatext "false" @default.
- W147343304 isRetracted "false" @default.
- W147343304 magId "147343304" @default.
- W147343304 workType "article" @default.