Physics – High Energy Physics
Scientific paper
Aug 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc.1040..140s&link_type=abstract
KEK COSMOPHYSICS GROUP INAUGURAL CONFERENCE ``ACCELERATORS IN THE UNIVERSE'': Interplay between High Energy Physics and Cosmophy
Physics
High Energy Physics
Gamma-Ray Sources, Gamma-Ray Bursts, Black Holes, Star Formation, Astronomical Observations, Planetary Bow Shocks, Interplanetary Shocks, Supernovae, Stellar Rotation
Scientific paper
We perform fully general relativistic simulations of collapse of a rapidly rotating massive stellar core to a 'collapsar' black hole (BH) surrounded by a massive, hot accretion disk with simplified microphysics. We continue the simulation until the system consisting of the BH and the disk has relaxed to a quasi-stationary state. A novel mechanism found is that strong shock waves are formed at the inner part of the disk after the formation of the BH. These shock waves propagate mainly along the rotation axis, heating the disk and sweeping materials around the rotational axis, and thereby forming a low density region. The temperature of the disk is high enough for copious neutrino emission. All these features indicate that the direct formation of a rapidly rotating BH is a promising source of LGRBs.
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