Matches in SemOpenAlex for { <https://semopenalex.org/work/W1519255027> ?p ?o ?g. }
Showing items 1 to 63 of
63
with 100 items per page.
- W1519255027 startingPage "40" @default.
- W1519255027 abstract "This paper is predicated on the recent experimental findings that the smallest structural ferromagnesiosilica entities in collected chondritic aggregate interplanetary dust particles (IDPs) have a predictable metastable eutectic composition. Kinetically controlled gas to solid condensation of MgFe-SiO-O2-H2 vapors does NOT produce stoichiometric crystalline solids (i.e. minerals) such as predicted by equilibrium condensation models but instead yields amorphous solids that are chemically ordered at metastable eutectics in the binary phase diagrams. Therefore these condensed dust grains will have a considerable amount of 'internal free energy' that will make them highly responsive to changes in their environments. Their inherent high energy-content 'buys' time and energy for mineralogical modification and chemical readjustment in response to changing environmental conditions. The activation energy barrier for reactions in metastable eutectic solids will be lower than for crystalline solids. As a result the reactions can take place at much lower temperatures and on much shorter time scales. That is, they will also occur much earlier in the evolution of a parent body wherein heat-producing sources may either be immature or inefficient. The ensuing reaction chains from metastable equilibrium to full thermodynamic equilibration with the local environment will be a chaotic 'Ostwald cascade' but from a well defined starting point to a predictable end result. Here we will discuss the implications of metastable eutectic dust as we see them for dust properties in icy and ice-free parent bodies wherein circumstellar dust is still recognizable because of the primitive nature of these parent bodies. We point to potential engineering constraints on sample acquisition and storage during Earth transit. Among the scientific goals of a primitive Near Earth Asteroid (NEA) sample return mission will be verification of the nature of dust forming and modification processes during hierarchical accretion in the earliest protoplanets. We propose sampling an infrared P- or D-class NEA or an object showing cometary activity such as 2201 Oljato that could be an asteroid or evolved comet. Additional information is contained in the original extended abstract." @default.
- W1519255027 created "2016-06-24" @default.
- W1519255027 creator A5038762851 @default.
- W1519255027 creator A5058335328 @default.
- W1519255027 date "2000-01-01" @default.
- W1519255027 modified "2023-09-27" @default.
- W1519255027 title "The Scientific Case for Sample Return from a Primitive Near-Earth Asteroid" @default.
- W1519255027 hasPublicationYear "2000" @default.
- W1519255027 type Work @default.
- W1519255027 sameAs 1519255027 @default.
- W1519255027 citedByCount "0" @default.
- W1519255027 crossrefType "journal-article" @default.
- W1519255027 hasAuthorship W1519255027A5038762851 @default.
- W1519255027 hasAuthorship W1519255027A5058335328 @default.
- W1519255027 hasConcept C121332964 @default.
- W1519255027 hasConcept C159467904 @default.
- W1519255027 hasConcept C178790620 @default.
- W1519255027 hasConcept C18168003 @default.
- W1519255027 hasConcept C185592680 @default.
- W1519255027 hasConcept C200093464 @default.
- W1519255027 hasConcept C8010536 @default.
- W1519255027 hasConcept C87355193 @default.
- W1519255027 hasConcept C87976508 @default.
- W1519255027 hasConcept C89464430 @default.
- W1519255027 hasConcept C97355855 @default.
- W1519255027 hasConceptScore W1519255027C121332964 @default.
- W1519255027 hasConceptScore W1519255027C159467904 @default.
- W1519255027 hasConceptScore W1519255027C178790620 @default.
- W1519255027 hasConceptScore W1519255027C18168003 @default.
- W1519255027 hasConceptScore W1519255027C185592680 @default.
- W1519255027 hasConceptScore W1519255027C200093464 @default.
- W1519255027 hasConceptScore W1519255027C8010536 @default.
- W1519255027 hasConceptScore W1519255027C87355193 @default.
- W1519255027 hasConceptScore W1519255027C87976508 @default.
- W1519255027 hasConceptScore W1519255027C89464430 @default.
- W1519255027 hasConceptScore W1519255027C97355855 @default.
- W1519255027 hasLocation W15192550271 @default.
- W1519255027 hasOpenAccess W1519255027 @default.
- W1519255027 hasPrimaryLocation W15192550271 @default.
- W1519255027 hasRelatedWork W1493971918 @default.
- W1519255027 hasRelatedWork W1532584592 @default.
- W1519255027 hasRelatedWork W1567882152 @default.
- W1519255027 hasRelatedWork W1571806652 @default.
- W1519255027 hasRelatedWork W1656978089 @default.
- W1519255027 hasRelatedWork W1865627236 @default.
- W1519255027 hasRelatedWork W1985022138 @default.
- W1519255027 hasRelatedWork W2008323137 @default.
- W1519255027 hasRelatedWork W2019668175 @default.
- W1519255027 hasRelatedWork W2036924873 @default.
- W1519255027 hasRelatedWork W2064954208 @default.
- W1519255027 hasRelatedWork W2072792809 @default.
- W1519255027 hasRelatedWork W2131719288 @default.
- W1519255027 hasRelatedWork W2171466287 @default.
- W1519255027 hasRelatedWork W2273218926 @default.
- W1519255027 hasRelatedWork W2580067963 @default.
- W1519255027 hasRelatedWork W2763390826 @default.
- W1519255027 hasRelatedWork W3043561003 @default.
- W1519255027 hasRelatedWork W3121313221 @default.
- W1519255027 isParatext "false" @default.
- W1519255027 isRetracted "false" @default.
- W1519255027 magId "1519255027" @default.
- W1519255027 workType "article" @default.