Statistics – Computation
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991baicz..42..241z&link_type=abstract
Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 42, no. 4, July 1991, p. 241-247.
Statistics
Computation
Comet Tails, Computational Astrophysics, Ice, Trajectory Analysis, Computer Programs, Field Theory (Physics), Gravitational Fields, Radiation Pressure
Scientific paper
The motion of ice grains in cometary tails is investigated analytically for the case in which gravity, radiative pressure, and reactive forces are present. The trajectory of an ice grain is developed for the duration of the flight from the cometary nucleus to the point of observation. Two repulsive forces - radiation pressure and the reactive force - are then examined with attention given to the factor of asymmetry, the position angle, and the thermal characteristics of the ice grain. A computer program developed according to the equations permits the description of 'axial' curves for different sets of initial parameters. Total relative repulsive acceleration is small for ice particles, somewhat larger for temperately volatile materials, and very small for materials with larger values of sublimation heat. The coefficient for the passage of convection of heat is considered to develop the differences between the maximum and the minimum temperatures on the surface of grains in different cases.
Wolf Manfred
Zacek P.
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