The radio nebula produced by the 27 December 2004 giant flare from SGR 1806-20 |
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| Authors: | Joseph D Gelfand |
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| Institution: | (1) Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA |
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| Abstract: | On 27 December 2004, just the third giant flare was observed from a magnetar, in this case SGR 1806-20. This giant flare was
the most energetic of the three, and analysis of a Very Large Array observation of SGR 1806-20 after the giant flare revealed
the existence of a new, bright, transient radio source at its position. Follow-up radio observations of this source determined
that initially, this source underwent a mildly relativistic one-sided expansion which ceased at the same time as a temporary
rebrightening of the radio source. These observational results imply that the radio emission is powered by ∼1024 g of baryonic material which was ejected off the surface on the neutron star during the giant flare.
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| Keywords: | Pulsars: individual SGR 1806-20 Pulsars: general |
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