ar X iv : 1 21 0 . 04 43 v 2 [ gr - q c ] 2 0 Fe b 20 13 Ultrarelativistic Black Hole Formation
نویسنده
چکیده
We study the head-on collision of fluid particles well within the kinetic energy dominated regime (γ = 8 to 12) by numerically solving the Einstein-hydrodynamic equations. We find that the threshold for black hole formation is lower (by a factor of a few) than simple hoop conjecture estimates, and, moreover, near this threshold two distinct apparent horizons first form postcollision and then merge. We argue that this can be understood in terms of a gravitational focusing effect. The gravitational radiation reaches luminosities of 0.014 c/G, carrying 16±2% of the total energy.
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تاریخ انتشار 2013