Stochastic histories of dust grains in the interstellar medium

Simple item page
dc.contributor.advisorClayton, Donald D.en_US
dc.creatorLiffman, Kurten_US
dc.date.accessioned2009-06-04T00:40:26Zen_US
dc.date.available2009-06-04T00:40:26Zen_US
dc.date.issued1988en_US
dc.description.abstractThe purpose of this thesis is to study an evolving system of SUperNOva CONdensateS (SUNOCONS) within the Interstellar Medium (ISM). This is done via a Monte Carlo process where refractory dust grains formed within supernova remnants are subjected to the processes of sputtering and collisional fragmentation in the diffuse phase and accretion within the cold molecular cloud phase. In order to record chemical detail, we take each new particle to consist of a superrefractory core plus a more massive refractory mantle. The particles are allowed to transfer to and fro between the different phases of the ISM until either the particles are destroyed or the program finishes. The resulting chemical and size spectrum(s) are then applied to various astrophysical problems with the following results: (1) after six thousand million years roughly 10 to 20% by mass of the most refractory material (Al$\sb2$O$\sb3$) survives the rigors of the ISM intact, which leaves open the possibility that 'fossilized' isotopically anomalous material may have been present within the primordial solar nebula. (2) structured or layered refractory dust grains within our model cannot explain the observed interstellar depletions of refractory material. (3) fragmentation due to grain-grain collisions in the diffuse phase plus the accretion of material in the molecular cloud phase can under certain circumstances cause a bimodal distribution in grain size.en_US
dc.format.extent172 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoThesis Sp. Sci. 1988 Liffmanen_US
dc.identifier.citationLiffman, Kurt. "Stochastic histories of dust grains in the interstellar medium." (1988) Diss., Rice University. <a href="https://hdl.handle.net/1911/16162">https://hdl.handle.net/1911/16162</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/16162en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectAstronomyen_US
dc.subjectAstrophysicsen_US
dc.titleStochastic histories of dust grains in the interstellar mediumen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentSpace Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
8900256.PDF
Size:
4.05 MB
Format:
Adobe Portable Document Format
Download
Collections
Rice University Theses and Dissertations