Austin is a computational astrophysicist in the Science Engagement Section. He is a member of the ExaStar ECP project, primarily working on porting and optimizations for next-generation architectures. He received his Ph.D. in Physics with an Interdisciplinary Graduate Minor in Computational Science in August 2015, from the University of Tennessee, Knoxville. Austin’s research interests span the include the topics of computational and nuclear astrophysics, as well as application performance and utilization of high-performance computing resources.


University of Tennessee
Doctor of Philosophy (Ph.D.)
University of Tennessee
Master of Science (M.S.)
Murray State University
Engineering Physics/Mathematics & Statistics
Bachelor of Science (B.S.)

R&D Activities Contributions

Center for Accelerated Application Readiness (CAAR) - In preparation for next-generation supercomputer Summit, the Oak Ridge Leadership Computing Facility (OLCF) selected 13 partnership projects into its Center for Accelerated Application Readiness (CAAR)…


Dubey, Anshu, Klaus Weide, Jared O’Neal, Akash Dhruv, Sean Couch, J. Austin Harris, Tom Klosterman, et al. "Flash-X: A multiphysics simulation software instrument". SoftwareX 19 (2022): 101168.
Laiu, M. Paul, Eirik Endeve, Ran Chu, J. Austin Harris, O. E. Bronson Messer. "A DG-IMEX method for two-moment neutrino transport: Nonlinear solvers for neutrino–matter coupling". Astrophysical Journal Supplement 253, no. 2 (2021): 52. doi:10.3847/1538- 4365/abe2a8
Bruenn, Stephen W., John M. Blondin, W. Raphael Hix, Eric J. Lentz, Messer, O.~E.~B., Anthony Mezzacappa, Eirik Endeve, J. Austin Harris, Pedro Marronetti, Reuben D. Budiardja, Merek A. Chertkow, Ching-Tsai Lee. "Chimera: A massively parallel code for core-collapse supernova simulations". Astrophysical Journal Supplement Series 248 (2020): 11. doi:10.3847/1538-4365/ab7aff
Harris, J. Austin, W. Raphael Hix, Merek A. Chertkow, C. T. Lee, Eric J. Lentz, and O. E. Bronson Messer. "Implications for Post-Processing Nucleosynthesis of Core-Collapse Supernova Models with Lagrangian Particles". Astrophysical Journal 843 (2017): 2. doi:10.3847/1538-4357/aa76de
Bruenn, Stephen W., Eric J. Lentz, W. Raphael Hix, Anthony Mezzacappa, J. Austin Harris, O. E. Bronson Messer, Eirik Endeve, John M. Blondin, Merek A. Chertkow, Eric J. Lingerfelt, Pedro Marronetti, and Konstantin N. Yakunin. "Development of Explosions in Axisymmetric Ab Initio Core-Collapse Supernova Simulations of 12-25 M⊙ Stars". Astrophysical Journal 818 (2016): 123. doi:10.3847/0004- 637X/818/2/123
Lentz, Eric J., Stephen W. Bruenn, W. Raphael Hix, Anthony Mezzacappa, O. E. Bronson Messer, Eirik Endeve, John M. Blondin, J. Austin Harris, Pedro Marronetti, and Konstantin N. Yakunin. "Three-dimensional Core-collapse Supernova Simulated Using a 15 M⊙ Progenitor". Astrophysical Journal, Letters 807 (2015): L31. doi:10.1088/2041-8205/807/2/L31
Dong, Tingxing, Azzam Haidar, Piotr Luszczek, J. Austin Harris, Stanimire Tomov, and Jack Dongarra. "LU Factorization of Small Matrices: Accelerating Batched DGETRF on the GPU". Paper presented at 16th IEEE International Conference on High Performance Computing and Communications: HPCC 2014, Paris, France, August 20–22, 2014. doi:10.1109/HPCC.2014.30