July 7, 2008SLAC Annual Program ReviewPage 1 Particle Astrophysics and Cosmology Theoretical Research Overview R. Blandford KIPAC Director, PPA Assistant Director for Particle Astrophysics and Cosmology

July 7, 2008SLAC Annual Program ReviewPage 2 Personnel *Organized by personnel to comply with new OHEP organization *Groups led by Abel, Blandford, Wechsler –Also Baltz [->Google], Chen[->LCCPA, Taiwan] –Postdocs, students, visitors (collaborative) –Include non-theory work by them and group members –Exclude theory by others eg Allen, Digel, do Coutu e Silva, Kamae which is included under non-accelerator physics *Will be reviewed in Washington June 23 *One more joint faculty appointment likely –Search carefully for crossover candidate to theoretical physics *Kavli Prize Fellows advertised this summer

July 7, 2008SLAC Annual Program ReviewPage 3 Overview *High relevance to DOE Projects and Proposals –GLAST, LSST, SNAP, DES, CDMS… *Excellent postdocs, students –Moved on to excellent positions – *Collaboration with non-accelerator physics, theoretical physics *Strong emphasis on computational astrophysics *Supported by NSF, NASA … grants *270 papers over past three years –~2/3 relevant to DOE program –Many high impact

July 7, 2008SLAC Annual Program ReviewPage 4 Recent Results: *Cosmology –Dark matter –Dark energy –Gravitational lensing –Early structure formation –Clusters of galaxies –Galaxy magnetic field *Particle astrophysics –Black holes –Cosmic jets –Ultra High Energy Cosmic Rays –Gamma Ray Bursts –Magnetars –Supernova Remnants –White Dwarf Oscillations

July 7, 2008SLAC Annual Program ReviewPage 5 Future Program *Cosmology –Dark matter –Dark energy –Gravitational lensing –Early structure formation –Late structure formation *Particle Astrophysics –Black holes –Cosmic Jets –Gamma Ray Bursts and magnetars –Supernova remnants and the interstellar medium

July 7, 2008SLAC Annual Program ReviewPage 6 This Session *Risa Wechsler: Future Dark Energy Surveys *Matt Turk: Computational Adaptive Mesh Refinement Cosmology *Peng Wang: Numerical Simulation of Relativistic Jets *Shizuka Akiyama: Numerical Simulations of Gamma Ray Bursts *Eric Morgansen: Clustering of Faint Sources

July 7, 2008SLAC Annual Program ReviewPage 7 Computational Physics *Large scale simulation –AMR - MPI codes Dark matter simulations, galaxies, stars –PIC codes Shock structure and particle acceleration *Hardware aspirations –200 compute nodes, 100 TB storage per year *Visualization –Interactive system on high performance graphics hardware –Stereo and tiled display walls –GPUs programmable - 100xspeed up - actively being explored