Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1994-08-09
Phys.Rev. E52 (1995) 4430
Physics
High Energy Physics
High Energy Physics - Theory
LaTeX, 27 pages with 12 figures available from the authors or can be generated from Mathematica instructions at end of the fil
Scientific paper
10.1103/PhysRevE.52.4430
For zero energy, $E=0$, we derive exact, classical solutions for {\em all} power-law potentials, $V(r)=-\gamma/r^\nu$, with $\gamma>0$ and $-\infty <\nu<\infty$. When the angular momentum is non-zero, these solutions lead to the orbits $\r(t)= [\cos \mu (\th(t)-\th_0(t))]^{1/\mu}$, for all $\mu \equiv \nu/2-1 \ne 0$. When $\nu>2$, the orbits are bound and go through the origin. This leads to discrete discontinuities in the functional dependence of $\th(t)$ and $\th_0(t)$, as functions of $t$, as the orbits pass through the origin. We describe a procedure to connect different analytic solutions for successive orbits at the origin. We calculate the periods and precessions of these bound orbits, and graph a number of specific examples. Also, we explain why they all must violate the virial theorem. The unbound orbits are also discussed in detail. This includes the unusual orbits which have finite travel times to infinity and also the special $\nu = 2$ case.
Daboul Jamil
Nieto Michael Martin
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