Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107..765s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 107, no. 2, p. 765-771
Astronomy and Astrophysics
Astronomy
9
Astronomical Models, Chiron, Coma, Gravitational Effects, Interplanetary Dust, Light Scattering, Mathematical Models, Orbits, Particle Trajectories, Trajectory Analysis, Computerized Simulation, Dynamic Models, Perihelions
Scientific paper
Scattered light from orbiting or coorbiting dust is a primary signature by which Earth-based observers study the activity and atmosphere of the unusual outer solar system object 2060 Chiron. Therefore, it is important to understand the lifetime, dynamics, and loss rates of dust in its coma. We report here dynamical simulations of particles in Chiron's collisionless coma. The orbits of 17,920 dust particles were numerically integrated under the gravitational influence of Chiron, the Sun, and solar radiation pressure. These simulations show that particles ejected from Chiron are more likely to follow suborbital trajectories, or to escape altogether, than to enter quasistable orbits. Significant orbital lifetimes can only be achieved for very specific launch conditions. These results call into question models of a long-term, bound coma generated by discrete outbursts, and instead suggest that Chiron's coma state is closely coupled to the nearly instantaneous level of Chiron's surface activity.
Alan Stern S.
Boice Daniel C.
Jackson Andrew
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