Mathematics – Probability
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001dps....33.3106m&link_type=abstract
American Astronomical Society, DPS Meeting #33, #31.06; Bulletin of the American Astronomical Society, Vol. 33, p.1094
Mathematics
Probability
Scientific paper
We have developed a semi-analytic model of the combined effects of tidal perturbations of the galactic force and a stellar impulse acting on the Sun and the outer Oort cloud of comets. The six dimensional phase space of near-parabolic comet orbital elements has been subdivided into cells. A mapping of the evolution of these elements from beyond the loss cylinder boundary into the inner planetary region over the course of a single orbit is possible. The time dependence of the comet flux interior to 5 AU is then obtained for a period of 5 Myr subsequent to the impulse. The peak flux and the time integrated net shower flux are obtained over a wide range of stellar impact parameters bsolar > 30 000 AU and stellar mass to relative velocity ratios, M*/Vrel, such that the peak flux enhancement is <1.5 times the background flux due to the galactic tide alone. Loci of the results for the peak flux enhancement and the time integrated net shower flux versus bsolar and M*}/V{rel are given. Using the number densities and dispersion velocities of stellar populations we also obtain the time dependent probability of a stellar impulse versus bsolar and M*}/V{rel. Finally, we employ Monte Carlo sampling to estimate the frequency of stellar encounters as functions of the peak flux enhancement and also of the time integrated net shower flux. A graph of the cumulative number of stellar impulses expected over 4 Gyr as a function of the shower strength will also be given. \em{JJM acknowledges the support of a NASA-AAS Small Research Grant and a NASA-ASEE Summer Faculty Fellowship at Ames Research Center. JJL received support from Planetary Geology and geophysics grant 334-30-50-01}
Lissauer Jack . J.
Matese John J.
No associations
LandOfFree
Frequency of Weak Stellar Showers of Oort Cloud Comets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Frequency of Weak Stellar Showers of Oort Cloud Comets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency of Weak Stellar Showers of Oort Cloud Comets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1238180