Files in this item

FilesDescriptionFormat

application/pdf

application/pdfChristie_Duncan.pdf (3Mb)
(no description provided)PDF

Description

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
Discipline:Physics
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
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
URI:http://hdl.handle.net/2142/24373
Rights Information:Copyright 2011 Duncan A. Christie
Date Available in IDEALS:2011-05-25
2013-05-26
Date Deposited:2011-05


This item appears in the following Collection(s)

Item Statistics

  • Total Downloads: 62
  • Downloads this Month: 0
  • Downloads Today: 0