Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011dda....42.0903d&link_type=abstract
American Astronomical Society, DDA meeting #42, #9.03; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
It has long been thought that Giant Molecular Clouds (GMCs) may have a significant effect on the dynamical evolution of wide binary stars and Oort cloud (OC) comets. In order to further study this issue, we have begun a series of numerical simulations of the dynamical interactions between GMCs and the OC. In the simulations the orbit of the Sun and a chosen retinue of initially bound OC comets are integrated in a fixed three-component model (disk, bulge and halo) of the Galaxy using a Burlisch-Stoer integrator. In keeping with current conceptions of GMC internal structure, each GMC is modeled as a fractal hierarchy of clumps with a fractal dimension D 1.6. The orbit of each GMC is modeled using the epicyclic approximation and the dynamical effects on the Sun and OC of the ensemble of GMCs are treated via direct N-body integration over the 4.5 Gyr orbital lifetime of the Sun. Preliminary results of the simulations will be presented.
Babcock C.
Duncan Martin J.
Kaib Nathan
Levison Hal
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