Dr. Yosi Gelfand

New York University

"Radio Emission from the Magnetar SGR 1806-20 Giant Flare"

On 2004 December 27, the brightest flash of gamma-rays yet observed was detected from the extremely magnetic neutron star (magnetar) SGR 1806-20 -- only the third, and by far most luminous, Giant Flare detected from such objects. Analysis of radio observations shortly after this event discovered a new, extremely bright but variable radio source at the location of this neutron star. In this talk, I will present the results from a long-term monitoring campaign of this radio source, which I will argue indicates this emission is being driven by material blown off the surface of the neutron star during this giant flare.

Back to Spring 2008 Astrophysics Seminars

Received December 6, 2007