Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Iwamoto, Masanori"'
Publikováno v:
A&A 690, A332 (2024)
Fast radio bursts (FRBs) are bright extragalactic transients likely produced by magnetars. We study the propagation of FRBs in magnetar winds, assuming that the wind is strongly magnetized and composed of electron-positron pairs. We focus on the regi
Externí odkaz:
http://arxiv.org/abs/2409.10732
We study the propagation of electromagnetic waves in tenuous plasmas, where the wave frequency, $\omega_0$, is much larger than the plasma frequency, $\omega_{\rm P}$. We show that in pair plasmas nonlinear effects are weak for $a_0 \ll \omega_0/\ome
Externí odkaz:
http://arxiv.org/abs/2409.04127
Fast radio bursts (FRBs) are millisecond transient astrophysical phenomena and bright at radio frequencies. The emission mechanism, however, remains unsolved yet. One scenario is a coherent emission associated with the magnetar flares and resulting r
Externí odkaz:
http://arxiv.org/abs/2311.18487
The nonlinear interaction between electromagnetic waves and plasmas attracts significant attention in astrophysics because it can affect the propagation of Fast Radio Bursts (FRBs) -- luminous millisecond-duration pulses detected at radio frequency.
Externí odkaz:
http://arxiv.org/abs/2304.03577
Autor:
Sobacchi, Emanuele, Lyubarsky, Yuri, Beloborodov, Andrei M., Sironi, Lorenzo, Iwamoto, Masanori
Nonlinear effects are crucial for the propagation of Fast Radio Bursts (FRBs) near the source. We study the filamentation of FRBs in the relativistic winds of magnetars, which are commonly invoked as the most natural FRB progenitors. As a result of f
Externí odkaz:
http://arxiv.org/abs/2210.08754
Publikováno v:
The Astrophysical Journal 924 (2022) 2
Particle acceleration at magnetized purely perpendicular relativistic shocks in electron-ion plasmas are studied by means of two-dimensional particle-in-cell simulations. Magnetized shocks with the upstream bulk Lorentz factor $\gamma_1 \gg 1$ are kn
Externí odkaz:
http://arxiv.org/abs/2111.05903
Autor:
Ligorini, Arianna, Niemiec, Jacek, Kobzar, Oleh, Iwamoto, Masanori, Bohdan, Artem, Pohl, Martin, Matsumoto, Yosuke, Amano, Takanobu, Matsukiyo, Shuichi, Hoshino, Masahiro
Particle acceleration and heating at mildly relativistic magnetized shocks in electron-ion plasma are investigated with unprecedentedly high-resolution two-dimensional particle-in-cell simulations that include ion-scale shock rippling. Electrons are
Externí odkaz:
http://arxiv.org/abs/2101.09256
Autor:
Ligorini, Arianna, Niemiec, Jacek, Kobzar, Oleh, Iwamoto, Masanori, Bohdan, Artem, Pohl, Martin, Matsumoto, Yosuke, Amano, Takanobu, Matsukiyo, Shuichi, Esaki, Yodai, Hoshino, Masahiro
Mildly relativistic shocks in magnetized electron-ion plasmas are investigated with 2D kinetic particle-in-cell simulations of unprecedentedly high resolution and large scale for conditions that may be found at internal shocks in blazar cores. Ion-sc
Externí odkaz:
http://arxiv.org/abs/2012.08969
Autor:
Iwamoto, Masanori, Amano, Takanobu, Hoshino, Masahiro, Matsumoto, Yosuke, Niemiec, Jacek, Ligorini, Arianna, Kobzar, Oleh, Pohl, Martin
Publikováno v:
The Astrophysical Journal Letters 883 (2019) L35
We investigated electromagnetic precursor wave emission in relativistic shocks by using two-dimensional particle-in-cell simulations. We found that the wave amplitude is significantly enhanced by a positive feedback process associated with ion-electr
Externí odkaz:
http://arxiv.org/abs/1909.03337
We discuss a mechanism for intense electromagnetic wave emission at an astrophysical relativistic shock in a magnetized collisionless plasma. At the magnetized shock, the particle reflection by a compressed magnetic field of the shock produces a ring
Externí odkaz:
http://arxiv.org/abs/1902.06271