Magnetic Reconnection in the Wakes of Cosmic Strings

The motion of cosmic strings in the universe leads to the generation of wakes behind them. We study magnetized wakes of cosmic strings moving in the postrecombination plasma. We show that magnetic reconnection can occur in the postshock region. Since the width of the cosmic-string wake is very small, the reconnection occurs over a very short length scale. The reconnection leads to a large amount of kinetic energy being released in the postshock region of the cosmic-string wake. This enhances the kinetic energy released during the reconnection. We make a rudimentary estimate of the kinetic energy released by the magnetic reconnection in cosmic-string wakes and show that it can account for low-energy gamma-ray bursts in the postrecombination era.

Automated summary

The motion of cosmic strings generates wakes behind them, and we studied the magnetized wakes of cosmic strings in the postrecombination plasma. We found that magnetic reconnection occurs in the postshock region, releasing a large amount of kinetic energy. This release of energy during reconnection can account for low-energy gamma-ray bursts in the postrecombination era.