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Creators/Authors contains: "Hakobyan, H."

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  1. ; ; ; ; ( , The Astrophysical Journal Letters)
    Abstract One scenario for the generation of fast radio bursts (FRBs) is magnetic reconnection in a current sheet of the magnetar wind. Compressed by a strong magnetic pulse induced by a magnetar flare, the current sheet fragments into a self-similar chain of magnetic islands. Time-dependent plasma currents at their interfaces produce coherent radiation during their hierarchical coalescence. We investigate this scenario using 2D radiative relativistic particle-in-cell simulations to compute the efficiency of the coherent emission and to obtain frequency scalings. Consistent with expectations, a fraction of the reconnected magnetic field energy, f ∼ 0.002, is converted to packets of high-frequencymore »fast magnetosonic waves, which can escape from the magnetar wind as radio emission. In agreement with analytical estimates, we find that magnetic pulses of 10 47 erg s −1 can trigger relatively narrowband GHz emission with luminosities of approximately 10 42 erg s −1 , sufficient to explain bright extragalactic FRBs. The mechanism provides a natural explanation for a downward frequency drift of burst signals, as well as the ∼100 ns substructure recently detected in FRB 20200120E .« less
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  2. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review C)
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  3. ; ; ; ; ; ; ; ; ; ; et al ( , Physics Letters B)
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  4. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review D)
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  5. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review C)
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  6. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review C)
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  7. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review Letters)
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  8. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review C)
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  9. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review Letters)
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  10. ; ; ; ; ; ; ; ; ; ; et al ( , Physical Review Letters)
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