SCAC Members

Faculty and Research Staff

Astrophysicists

Computer Scientists

• Stan Woosley - Professor of Astronomy and Astrophysics, Chair Department of Astronomy and Astrophysics, PI of SciDAC grant. Working on presupernova evolution, nucleosynthesis, and models for Type Ia supernovae, gamma-ray bursts, and x-ray bursts.



• Gary Glatzmaier - Professor of Earth Sciences. Director, Center for the Origin and Dynamical Evolution of Planets (CODEP) working on develpment and augmentations to his 3D, MHD anelastic hydrodynamics code to study stellar evolution, nuclear runaways,and stellar rotation and magnetic fields.

• Tom Clune - Goddard Space Flight Center. Aiding in optimization of Glatzmaier's inelastic hydrodynamics code on parallel mainframes

• Adam Burrows - Professor of Astronomy, Steward Observatory. Overall organizational responsibility for activities at Arizona. Working on approaches to neutrino transport and hydrodynamics for core collapse supernovae.
  
  
• Phil Pinto - Associate Professor of Astronomy, Steward Observatory Currently working on development of ZEUS-MP, a radiation/hydro code employing 1-, 2-, and 3-D time-dependent Monte Carlo transport techniques to handle the neutrinos and their coupling to matter. Also in charge of spectral modeling and light curves of supernova models.
  

• Bernard Ziegler - Professor of Computer Sciences Developing the DEVS-DOC runtime nvironment to seamlessly join the execution of collapse, delay, and explosion phases, with runtime querying and visualization capabilities. The Director of ACIMS (Arizona Center for Integrative Modeling and Simulation).
  


• Salim Hariri - Professor of Electrical and Computer Sciences Director, ATM Distributed Computing Laboratory Heading up the effort to optimize and parallelize code on the NERSC machine, with particular emphasis on load balancing, pre-fetching techniques, etc. Responsible for the implementation of the AdViCE system that provides a user interface that allows users to develop, run, and visualize parallel/distributed applications.
  
  
• Hessam Sarjoughian

• Chris Fryer - Staff Member in the Thereotical Astrophysics Group (T-6), LANL. Head of LANL supernova effort: 3D core-collapse supernova models using SNSPH, a smooth particle hydrodynamics (SPH) code.



• Alex Heger - Staff Member in the Thereotical Astrophysics Group (T-6), LANL. Working on presupernova evolution, nucleosynthesis, Pop III stars, pair instability supernovae, and stellar evolution including rotation.

• Mike Warren - Working with C. Fryer to add physics to 3D SPH code and optimize that code to run NERSC machines. He is also leading the development of parallel libraries used at LANL to optimize its codes.

• Rob Hoffman- Staff member N-Division, LLNL Working on nucleosynthesis calculations and standardization of nuclear reaction rates for machine usage. Also on studies of the r- and s-process.



• Frank Dietrich - Staff member N-Division, LLNL. Head Nuclear modeling group. Working on improved theoretical estimates for astrophysical reaction rates especially using Hauser Feshbach theory.



• Jay Salmonson - Physicist, AX-Division, LLNL. Working on relativistic hydrodynamics, especially for gamma-ray burst models.

PostDocs

Astrophysicists

Computer Scientists

• Andrew Cumming - Hubble Space Telescope Fellow Working on x-ray bursts. Using x-ray bursts to constrain neutron star properties.



• Mike Zingale - co- author Univ Chicago FLASH code. Working on turbulent combustion, Type Ia supernovae, x-ray bursts and PPM code development.

• Rolf Walder - Should join us before the end of May. Will assume, along with Burrows, overall responsibility for the development of multi-D radiation/hydrodynamics codes.
  

• Adrian Gentle - Taking primary resposibility with many of the hydrodynamical tests of the SPH code in addition to implementing the relativistic corrections into the code. Formerly of Monash. Expert in numerical relativity.
  

• Jason Pruet - studies theoretical astrophysics, specializing in weak interaction physics related to aspects of core collapse supernova and gamma-ray bursts. He is also interested in nucleosynthesis, especially the r-process, and the weak interaction physics that may drive it. Expert in neutrino physics and weak interaction rates. Formerly at UC San Diego

Grads

Astrophysicists

Computer Scientists

• Weiqun Zhang - Multidimensional calculation of relativistic jet propagation in gamma-ray burst models



• Tami Rogers - Two dimensional anelastic hydrodynmics calculatons of convection at high Rayleigh number



• Michael Kuhlen - Three dimensional anelastic hydrodynamics calculations of stellar convection



• Ian Dobbs-Dixon - Calculations of semiconvection using the Kerstein-Wunsch model for "one dimensional turbulence"
  

• Todd Thompson - Incorporating the full neutrino microphysics package into the precision 1-D code alluded to above, including a novel technique for energy redistribution due to neutrino electron and neutrino-nucleon scattering (done). Full 1-D collapse simulations and code optimization.



• Casey Meakin - Getting the ZEUS-MP and ASCI FLASH codes ready for multi-D supernova collapse and explosion calculations. He is working on EOS coupling, optimization on Origins 200 and NERSC IBM-SP, as well as visualization. He is also exploring the use of the MHD component of ZEUS-MP for studies of the collapse and protoneutron star phases with B-fields.



• Christian Ott - Using the GR3D general relativistic code for multi-D collapse simulations without transport to explore gravitational radiation signatures. Code is now working on the T3E at NERSC and is to be ported to the NERSC IBM-SP within the month.



• Marc Metchnik - Collaborating with Phil Pinto on the ZEUS-MP/Monte Carlo development effort.



• Jeremiah Murphy - In collaboration with Burrows and C. Meakin, multi-D hydrodynamic
  simulations of core collapse, gradiational radiation signatures, and hydrodynamic kick mechanisms.

• Yeliang Zhang , Ming Zhang - Working with S. Hariri on code optimization, first using ZEUS-MP on the NERSC IBM-SP.



• Akerkar Salil - Visualization tools for the hydrodynamics runs, both at Arizona and NERSC.



• Jeff Mather - Working on Common Component Architectures



• Jingmei Yang

Associated Research Staff

Astrophysicists

Computer Scientists

• Matt Boyes - Dependence of stellar evolution and nucleosynthesis on the rate for 12C(a,g)16O; Web design

Close Collaborators

Astrophysicists

Computer Scientists