Research Interests

I study various topics in Theoretical Astrophysics, with a focus on:

  • High-Energy Astrophysics,
  • Neutrino and Cosmic-Ray Astrophysics,
  • Relativistic Plasma Astrophysics.

A significant fraction of my time is devoted to leading the Israeli side of the Israeli/US UV satellite mission ULTRASAT, which is aiming at revolutionizing the study of astronomical transients:

Some exciting recent news on these subjects

  • IceCube detects extra-terrestrial neutrinos (see ViewPoint for a general intro and references).
  • AMS-02 results support a secondary origin for cosmic-ray positrons (PRL).

Some pedagogical reviews of these subjects