Evolution of magnetic fields in cosmic string wakes

Nayak, Soumen; Sau, Sovan; Sanyal, Sankar P.

doi:10.1016/j.astropartphys.2022.102805

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Introduction1

Shocks and Magnetic Fields In Cosmic-string Wakes1

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2023

2024

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Cited by 2 publications

(2 citation statements)

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“…If these fields are enhanced due to turbulence in the plasma, they will survive until the matter epoch. Our previous work (Nayak et al 2023) has indicated that there is a possibility of magnetic reconnection in cosmic-string wakes; in this work we show how magnetic reconnection occurs in the wake of cosmic strings and discuss the possibility that they may lead to GRBs in the postrecombination era.…”

Section: Introductionmentioning

confidence: 79%

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Magnetic Reconnection in the Wakes of Cosmic Strings

Kumar

Sanyal

2023

ApJ

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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.

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Section: Introductionmentioning

confidence: 79%

“…In recent simulations of cosmic-string wakes, lines of magnetic reconnection have been observed as the string moves through the plasma (Nayak et al 2023). These magnetic reconnection lines have been observed for a magnetic field in the wake of a cosmic string with some spatial variations.…”

Section: Shocks and Magnetic Fields In Cosmic-string Wakesmentioning

confidence: 99%