Physics Experts

Kevin Marshall

Physics and Astronomy
Widener University
United States of America

Kevin Marshall


PhD Astronomy 2006 Georgia State University (GA)

Research Interest

focused on high-energy variability in active galactic nuclei. Some galaxies have super massive black holes at their centers, which are actively pulling in matter. As gas falls into the black hole, it heats up and emits tremendous amounts of light. High-energy radiation (such as X-rays and gamma-rays) comes from the innermost regions near the black hole. I study how these objects vary in brightness over time and use analysis techniques to put constraints on the physical parameters and geometry of the central black hole.


  • Marshall, K. et al. (2009). Multiwavelength variability of the broad line radio galaxy 3C 120. The Astrophysical Journal, 696, 601.

  • Marshall, K. et al. (2008). Correlated X-ray and optical variability in Markarian 509. The Astrophysical Journal, 677, 880.

  • Maune, J.D., Eggen, J.R., Miller, H.R., Marshall, K., et al. (2014). The extreme behavior of the radio-loud narrow-line seyfert 1 galaxy J0849+5108. The Astrophysical Journal, 794, 93.

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