The Effects of Stellar Migration on the Oort Cloud

Details The Effects of Stellar Migration on the Oort Cloud The Effects of Stellar Migration on the Oort Cloud

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.5508k&link_type=abstract

American Astronomical Society, DPS meeting #41, #55.08

Astronomy and Astrophysics

Astronomy

Scientific paper

Since the Sun left its birth environment, the structure of the Oort Cloud has largely been sculpted by the gravitational perturbations of passing field stars and the tide of the Milky Way. In most simulations of Oort Cloud formation, it is assumed that the strength of these perturbations has remained roughly constant throughout the entire history of the solar system. However, recent models of the evolution of Milky Way-type galaxies indicate that many thin disk stars migrate across significant galactocentric distances while preserving their initial low eccentricity orbits. This raises the possibility that the Sun may have had such a galactic orbital history. To investigate this, we combine galactic-scale numerical simulations of stellar migration with Oort Cloud formation simulations performed on the planetary scale. We use these simulation results to determine the impact of stellar migration on Oort Cloud formation and whether the Oort Cloud can be used to constrain the Sun's orbital history in the Milky Way.

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