Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....77..152h&link_type=abstract
Astronomy and Astrophysics, vol. 77, no. 1-2, Aug. 1979, p. 152-154. Research supported by the Science Research Council.
Astronomy and Astrophysics
Astrophysics
7
Astrophysics, Equipartition Theorem, Kinetic Energy, Fragmentation, Velocity Distribution
Scientific paper
The paper indicates that exact kinetic energy equipartition, assumed by various authors in their treatment of colliding systems, will only hold if a physically implausible postulate is made about the collisions. In addition, it is shown that for reasonable interactions the kinetic energy of high mass objects will be less than that given by equipartition, this effect being enhanced by fragmentation. A computer simulation is presented from which a steady state mass-velocity distribution is obtained showing a slope steeper than that of the equivalent KEE line, the slope being alpha = -1.65 (where velocity is proportional to mass to the alpha power) rather than alpha = -0.5 expected for KEE. It is thus concluded that it appears to be totally unrealistic to assume KEE for any system in which substantial fragmentation is occurring and that any conclusions drawn from such a model must be considered doubtful.
Handbury M. J.
Simons Stephen
Williams Iwan P.
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