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Title:Fragmentation of magnetically-supported, weakly-ionized molecular clouds
Author(s):Christie, Duncan A.
Director of Research:Mouschovias, T. Ch.
Doctoral Committee Chair(s):Stack, John D.
Doctoral Committee Member(s):Mouschovias, T. Ch.; Wandelt, Benjamin D.; Looney, Leslie W.
Department / Program:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):molecular clouds
magnetic fields
ambipolar diffusion
star formation
Abstract:We follow the evolution and fragmentation of isolated, magnetically-supported, weakly- ionized, self-gravitating molecular clouds in three dimensions. Although the model clouds are supported by the magnetic field, high-density, magnetically-supercritical fragments form due to the drift between the ions and the neutrals, ambipolar diffusion. To follow the evolution of the model clouds, we extended the publicly-available Zeus-MP code to include the effects of nonideal magnetohydrodynamics and have modified several algo- rithms to improve accuracy and convergence. We present the results of a parameter study which varies the ionization fraction, mass-to-flux ratio, and velocity perturbation in the model clouds.
Issue Date:2011-05-25
Rights Information:Copyright 2011 Duncan A. Christie
Date Available in IDEALS:2011-05-25
Date Deposited:2011-05

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