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dc.contributor.author
Nietiadi, Maureen L.  
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Rosandi, Yudi  
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Bringa, Eduardo Marcial  
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Urbassek, Herbert M.  
dc.date.available
2024-07-08T11:10:32Z  
dc.date.issued
2022-02  
dc.identifier.citation
Nietiadi, Maureen L.; Rosandi, Yudi; Bringa, Eduardo Marcial; Urbassek, Herbert M.; Peripheral Collisions of Ice-covered Silica Dust Grains; IOP Publishing; Astrophysical Journal; 925; 2; 2-2022; 1-8  
dc.identifier.issn
0004-637X  
dc.identifier.uri
http://hdl.handle.net/11336/239280  
dc.description.abstract
Collisions with ice-covered silica grains are studied using molecular-dynamics simulation, with a focus on the influence of the impact parameter on the collision dynamics. The ice mantle induces an attractive interaction between the colliding grains, which is caused by the melting of the mantles in the collision zone and their fusion. For noncentral collisions, this attractive interaction leads to a deflection of the grain trajectories and, at smaller velocities, to the agglomeration ("sticking") of the colliding grains. The bouncing velocity, which is defined as the smallest velocity at which grains bounce off each other rather than stick, shows only a negligible dependence on the impact parameter. Close to the bouncing velocity, a temporary bridge builds up between the colliding grains, which, however, ruptures when the collided grains separate and relaxes to the grains. At higher velocities, the ice in the collision zone is squeezed out from between the silica cores, forming an expanding disk, which ultimately tears and dissolves into a multitude of small droplets. An essential fraction of the ice cover in the collision zone is then set free to space. Astrophysical implications include the possibility that organic species that might be present in small concentrations on the ice surface or at the ice-silica interface are liberated to space in such noncentral collisions.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
IOP Publishing  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
ICE GRAINS  
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COLLISIONS  
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MOLECULAR DYNAMICS  
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Astronomía  
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Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Peripheral Collisions of Ice-covered Silica Dust Grains  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2024-07-08T10:09:41Z  
dc.journal.volume
925  
dc.journal.number
2  
dc.journal.pagination
1-8  
dc.journal.pais
Reino Unido  
dc.journal.ciudad
Londres  
dc.description.fil
Fil: Nietiadi, Maureen L.. Universität Kaiserslautern; Alemania  
dc.description.fil
Fil: Rosandi, Yudi. Universitas Padjadjaran; Indonesia  
dc.description.fil
Fil: Bringa, Eduardo Marcial. Universidad de Mendoza. Facultad de Ingenieria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina. Universidad Mayor; Chile  
dc.description.fil
Fil: Urbassek, Herbert M.. Universität Kaiserslautern; Alemania  
dc.journal.title
Astrophysical Journal  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4357/ac403d  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3847/1538-4357/ac403d