I am a Moore postdoctoral fellow at Caltech. I mainly work on theoretical topics in high energy astrophysics such as Gamma Ray Bursts, r-process nucleosynthesis in the universe and formation of Neutron star systems. I was previously a postdoctoral researcher at The George Washington University, a Chateaubriand fellow at the Institut d'Astrophysique de Paris and did my PhD with Tsvi Piran at the Hebrew University.
Gamma Ray Bursts
Gamma Ray Bursts (GRBs) are extremely bright and rapid explosions associated with the collapse of massive stars or with compact star mergers. An ultra-relativistic jet forms at the centre of the explosion and due to internal dissipation emits gamma rays that are known as the “prompt" phase of the GRB. As the jet collides with the external environment, a smoother, longer-lived
“afterglow" emission is produced. Although studied for almost 50 years, some major questions about GRBs remain unsolved. I study radiation and dissipation mechanisms in the prompt and afterglow stages of GRBs.
About half of the elements in the universe heavier than iron are created via the rapid neutron capture process (the r-process). Over the recent years our understanding of the formation sites of these elements has rapidly evolved, and binary neutron star mergers have become a leading site for their origin. Recently r-process elements have been detected in very faint and small dwarf galaxies. I study the implications of these observations on the underlying r-process events in those galaxies and elsewhere in the universe.
Formation of binary neutron star systems
Binary neutron star systems are typically the result of two stellar collapses. The fact that the two stars remain bound to one another after two such collapses strongly constrains the latter. I have studied the conditions that take hold in the second collapse in order to explain the binary neutron star systems observed in our galaxy.
A LESSON FROM GW170817: MOST NEUTRON STAR MERGERS RESULT IN TIGHTLY COLLIMATED SUCCESSFUL GRB JETS
OBSERVATIONAL CONSTRAINTS ON THE STRUCTURE OF GAMMA-RAY BURST JETS
Teaching and online materials
Together with Almog Yalin, we have established an online source (“Theoretical Physics Digest”) aimed at enabling graduate students easier access into active research topics in Physics. The site's goal is to bridge the gap between the Physics learned at course levels and that necessary to conduct high level research.
During my PhD I've been working as a teaching assistant at the Hebrew University. Press below for lecture notes and other materials (Mostly in Hebrew).
I am a Moore postdoctoral fellow at Caltech. I mainly work on theoretical topics in high energy astrophysics such as Gamma Ray Bursts, r-process nucleosynthesis in the universe and formation of Neutron star systems. I was previously a postdoc at the George Washington university working with Chryssa Kouveliotou and a Chateaubriand fellow at IAP working with Robert Mochkovitch. I received my PhD from the Hebrew University in 2016, where I did my thesis under supervision of professor Tsvi Piran.
Washington, DC, USA
(202) 702 0365