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Title: The energetics of star-disc encounters and disc density profiles
Author: Hall, S. M.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 1997
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This thesis investigates the response of a circumstellar accretion disc to the fly-by of a perturbing mass on a parabolic orbit, both with and without the presence of dissipation. Observed protostellar number densities and velocity dispersions imply that collisions between protostellar systems are likely during the pre-main sequence phase of their evolution. Observations of the Orion Nebula have revealed 'truncated' discs and with this in mind the post-encounter material distributions are examined and are found to be promising candidates for the observed systems. Finally, the isolated evolution of the disc remnants are studied with a view to studying the motions of 'precessing' or 'wandering' jets.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available