School of Natural Sciences

Gamma Ray Bursts from a Different Angle: The Sequel

David Eichler
Ben Gurion University
September 23, 2014

A classic problem posed by long gamma ray bursts (GRB) is that the energy output requires gravitational energy release so deep within the host star that the prompt gamma rays should, upon naive consideration, have been obscured. It is suggested that photons emitted along the direction of the emitting plasma's motion are indeed geometrically blocked by optically thick baryonic matter, and that we usually see the photons that are emitted nearly backward in the frame of the emitting plasma. Many puzzling observations concerning GRB then fall into place.

What's Next?

Nathan Seiberg
Professor, School of Natural Sciences
December 4, 2013
In recent decades, physicists and astronomers have discovered two beautiful Standard Models, one for the quantum world of extremely short distances, and one for the universe as a whole. Both models have had spectacular success, but there are also strong arguments for new physics beyond these models. In this lecture, Nathan Seiberg, Professor in the School of Natural Sciences, reviews these models, their successes, and their shortfalls.