• Chemical evolution in low-mass star forming cores 

    Chen, Jo-Hsin (2010-08)
    In this thesis, I focus on the physical and chemical evolution at the earliest stages of low-mass star formation. I report results from the Spitzer Space Telescope and molecular line observations of 9 species toward the ...
  • Collapsar accretion and the gamma-ray burst X-ray light curve 

    Lindner, Christopher Carl (2010-05)
    We present axisymmetric hydrodynamical simulations of the long-term accretion of a rotating gamma-ray burst progenitor star, a "collapsar," onto the central compact object, which we take to be a black hole. The simulations ...
  • Multidimensional multiscale dynamics of high-energy astrophysical flows 

    Couch, Sean Michael (2010-05)
    Astrophysical flows have an enormous dynamic range of relevant length scales. The physics occurring on the smallest scales often influences the physics of the largest scales, and vice versa. I present a detailed study ...
  • Steady-state spherical accretion using smoothed particle hydrodynamics 

    Baumann, Mark Chapple (2011-12)
    Due to its adaptable nature in a broad range of problem domains, Smoothed Particle Hydrodynamics (SPH) is a popular numerical technique for computing solutions in astrophysics. This dissertation discusses the SPH technique ...