General Interests

• theoretical and computational astrophysics
  
• stellar evolution with and without rotation
  
• stellar structure dynamics including rotation
  pulsation, convection, turbulence, & diffusion
  
• numerical techniques and algorithms
  

Recent Projects

• Calculating low-order normal modes of oscillation of rapidly rotating stellar models
  using variational methods.
  
• Writing and running a 2D/3D hydrodynamics code to study the internal dynamics
  of rotating stars and to simulate the interaction of pulsation and rapid rotation.
  
• Computing rapidly rotating upper main sequence models to show that the convective
  core actually increases in mass if the angular velocity gradient is steep. This can
  double main sequence lifetimes and perhaps explain some blue stragglers.
  
• Modeling line-profile variables to predict the effects of rapid rotation on nonradial
  surface amplitudes.
  
• Developing a numerical method for integrating in 2D the nonradial pulsation
  equations for rapidly rotating stellar models.
  
• Computing the high-order gravity modes which are responsible for the line-profile
  variables on the upper main sequence.