Statistics – Computation
Scientific paper
Nov 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002phdt.........7c&link_type=abstract
Thesis (PhD). UNIVERSITY OF WYOMING, Source DAI-B 63/05, p. 2423, Nov 2002, 237 pages.
Statistics
Computation
2
Scientific paper
We present a method of modeling the accretion stream in magnetic cataclysmic variables known as polars. These new models rely on computationally intensive algorithms such as Smoothed Particle Hydrodynamics (SPH) which allows more detailed modeling as well as more flexibility in the physical processes included in the modeling. A detailed study of a reference SPH model, reveals details of the accretion stream, coupling region, and impact region on the white dwarf surface, in particular previously unrecognized asymmetries in the coupling and impact regions. An examination of a wide range of system parameters also reveals that the amount of material which may couple directly at the L1 region can be significant in some systems. Further models examining a variety of physical assumptions about the coupling process and temperature structure of the stream, show the great flexibility of the SPH method. Changes to the assumed conditions necessary for coupling make dramatic changes to the accretion stream geometry and structure. These initial results indicate the potential of the SPH method as well as a line of further inquiry that may significantly affect the understanding of these systems.
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