Mathematics – Logic
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21732202h&link_type=abstract
American Astronomical Society, AAS Meeting #217, #322.02; Bulletin of the American Astronomical Society, Vol. 43, 2011
Mathematics
Logic
Scientific paper
Understanding the evolution of gas and dust within protoplanetary disks is important for planet formation, for modeling astronomical observations of disks, and for interpreting mineralogical constraints on the Solar Nebula. The gas and solid components undergo distinct physical processes, but their evolution is coupled by aerodynamic forces whose strength varies with particle size. I will present models of the evolution of the radial distribution of dust grains that incorporate the effects of disk evolution (outward expansion and inward accretion), radial and azimuthal drag of the gas flow on the particle orbits, and the turbulent mixing of the particle ensemble radially within the disk. I will show results for the extent of radial mixing of hot, inner-disk particles, outward to large AU, and for the global evolution of the gas-to-dust ratio within the disk. I will discuss the relevance of the results for interpreting data from the Stardust mission, and for theoretical models of planetesimal formation.
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