Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010scchg..53s.262l&link_type=abstract
Science China Physics, Mechanics and Astronomy, Volume 53, Issue 1, pp.262-264
Astronomy and Astrophysics
Astronomy
Richtmyer-Meshkov Instability, Large Eddy Simulation, Navier-Stokes Equations, Turbulence Model, Gamma-Rays: Bursts, Outflow, Black Hole
Scientific paper
GRB 080913, with a spectroscopically determined redshift of z=6.7, was the record holder for being the most remote stellar object before the discovery of the recent gamma-ray burst GRB 090423, whose redshift is about 8.2. The gradually accumulated high redshift GRB sample has shed light on the origin and physical properties of GRBs during the cosmic re-ionization epoch. Here, we present a detailed numerical fit to the multi-wavelength data of the optical afterglow of GRB 080913 and then constrain its circumburst environment and the other model parameters. We conclude that the late optical/X-ray plateau at about one day since the burst is due to the Poynting-flux dominated injection from the central engine which is very likely a massive spinning black hole with super strong magnetic fields.
Bai Jingsong
Li Ping
Wang Tao
Zou Liyong
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