Research Interests

Theoretical astrophysics with concentration on high energy astrophysical processes in solar and stellar flares, gamma-ray bursts, accretion disks of stellar and active galactic black holes and clusters of galaxies, and in cosmology; early phase of the universe, the evolution of galaxies and quasars, arcs in clusters of galaxies, and gravitational lensing. 

• Theoretical Astrophysics 
• Cosmology 

Career History

• Member, Center of Space Science and Astro physics 
• Chair and Member of the Executive Committee, Astronomy Program 
• B.E.E., 1962, M.Sc. 1963, Ph.D. 1967, Cornell University 
• Research Fellow, California Institute of Technology, 1967-69 
• Stanford University, Assistant Professor, 1969-72 
• Associate Professor, 1973-79 
• Professor, 1980-present. 
• Alfred P. Sloan Fellow, 1972-74 
• Visiting Scientist at Institute of Astronomy, Cambridge, England, 1969 
• Visiting Scientists at Kitt Peak National Observatory, 1971, 1983, and 1998 
• Member, American Astronomical Society 
• Member, International Astronomical Union 

Post-Doctoral Fellows

• Siming Liu
• Felix Ryde 

Graduate Students

• Michael Dorris
• Yanwei Jiang
• Wei Liu

Undergraduate Students

• Joel Hartman
• Kevin Luli
• Matt McQuinn