Search Results - "Amano, Takanobu"

A SECOND-ORDER DIVERGENCE-CONSTRAINED MULTIDIMENSIONAL NUMERICAL SCHEME FOR RELATIVISTIC TWO-FLUID ELECTRODYNAMICS by Amano, Takanobu

“…ABSTRACT A new multidimensional simulation code for relativistic two-fluid electrodynamics (RTFED) is described. The basic equations consist of the full set of…”
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Theory of Stochastic Shock Drift Acceleration for Electrons in the Shock Transition Region by Katou, Takuma, Amano, Takanobu

“…We propose a novel electron acceleration mechanism, which we call stochastic shock drift acceleration (SSDA), that extends the standard shock drift…”
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Theory of Electron Injection at Oblique Shock of Finite Thickness by Amano, Takanobu, Hoshino, Masahiro

“…Abstract A theory of electron injection into diffusive shock acceleration (DSA) for the generation of cosmic-ray electrons at collisionless shocks is…”
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Persistence of Precursor Waves in Two-dimensional Relativistic Shocks by Iwamoto, Masanori, Amano, Takanobu, Hoshino, Masahiro, Matsumoto, Yosuke

“…We investigated the efficiency of coherent upstream large-amplitude electromagnetic wave emission via synchrotron maser instability in relativistic magnetized…”
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Enhanced Magnetic Field Amplification by Ion-beam Weibel Instability in Weakly Magnetized Astrophysical Shocks by Jikei, Taiki, Amano, Takanobu, Matsumoto, Yosuke

“…Abstract We examine the evolution of ion-beam Weibel instability at strong collisionless shocks in weakly magnetized media. We find that a finite background…”
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Precursor Wave Emission Enhanced by Weibel Instability in Relativistic Shocks by Iwamoto, Masanori, Amano, Takanobu, Hoshino, Masahiro, Matsumoto, Yosuke

“…We investigated the precursor wave emission efficiency in magnetized purely perpendicular relativistic shocks in pair plasmas. We extended our previous study…”
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Kinetic Simulations of Nonrelativistic Perpendicular Shocks of Young Supernova Remnants. III. Magnetic Reconnection by Bohdan, Artem, Pohl, Martin, Niemiec, Jacek, Vafin, Sergei, Matsumoto, Yosuke, Amano, Takanobu, Hoshino, Masahiro

“…Fully kinetic two-dimensional particle-in-cell simulations are used to study electron acceleration at high-Mach-number nonrelativistic perpendicular shocks…”
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Electron Acceleration at Rippled Low-mach-number Shocks in High-beta Collisionless Cosmic Plasmas by Kobzar, Oleh, Niemiec, Jacek, Amano, Takanobu, Hoshino, Masahiro, Matsukiyo, Shuichi, Matsumoto, Yosuke, Pohl, Martin

“…Abstract Using large-scale fully kinetic two-dimensional particle-in-cell simulations, we investigate the effects of shock rippling on electron acceleration at…”
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Kinetic Simulations of Nonrelativistic Perpendicular Shocks of Young Supernova Remnants. I. Electron Shock-surfing Acceleration by Bohdan, Artem, Niemiec, Jacek, Pohl, Martin, Matsumoto, Yosuke, Amano, Takanobu, Hoshino, Masahiro

“…Electron injection at high Mach number nonrelativistic perpendicular shocks is studied here for parameters that are applicable to young SNR shocks. Using…”
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Kinetic Simulations of Nonrelativistic Perpendicular Shocks of Young Supernova Remnants. II. Influence of Shock-surfing Acceleration on Downstream Electron Spectra by Bohdan, Artem, Niemiec, Jacek, Pohl, Martin, Matsumoto, Yosuke, Amano, Takanobu, Hoshino, Masahiro

“…We explore electron preacceleration at high-Mach-number nonrelativistic perpendicular shocks at, e.g., young supernova remnants, which are a prerequisite of…”
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Particle Acceleration by Pickup Process Upstream of Relativistic Shocks by Iwamoto, Masanori, Amano, Takanobu, Matsumoto, Yosuke, Matsukiyo, Shuichi, Hoshino, Masahiro

“…Abstract Particle acceleration at magnetized purely perpendicular relativistic shocks in electron–ion plasmas is studied by means of two-dimensional…”
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Magnetic Storm‐Time Red Aurora as Seen From Hokkaido, Japan on 1 December 2023 Associated With High‐Density Solar Wind by Kataoka, Ryuho, Miyoshi, Yoshizumi, Shiokawa, Kazuo, Nishitani, Nozomu, Keika, Kunihiro, Amano, Takanobu, Seki, Kanako

“…We report a citizen science‐motivated study on the cause of an unusually bright red aurora as witnessed from Hokkaido, Japan during a magnetic storm on 1…”
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Mildly relativistic magnetized shocks in electron–ion plasmas – II. Particle acceleration and heating by Ligorini, Arianna, Niemiec, Jacek, Kobzar, Oleh, Iwamoto, Masanori, Bohdan, Artem, Pohl, Martin, Matsumoto, Yosuke, Amano, Takanobu, Matsukiyo, Shuichi, Hoshino, Masahiro

“…ABSTRACT Particle acceleration and heating at mildly relativistic magnetized shocks in electron–ion plasma are investigated with unprecedentedly…”
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Electron–Ion Temperature Ratio in Astrophysical Shocks by Raymond, John C., Ghavamian, Parviz, Bohdan, Artem, Ryu, Dongsu, Niemiec, Jacek, Sironi, Lorenzo, Tran, Aaron, Amato, Elena, Hoshino, Masahiro, Pohl, Martin, Amano, Takanobu, Fiuza, Frederico

“…Abstract Collisionless shock waves in supernova remnants and the solar wind heat electrons less effectively than they heat ions, as is predicted by kinetic…”
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Kinetic Simulation of Nonrelativistic Perpendicular Shocks of Young Supernova Remnants. IV. Electron Heating by Bohdan, Artem, Pohl, Martin, Niemiec, Jacek, Morris, Paul J., Matsumoto, Yosuke, Amano, Takanobu, Hoshino, Masahiro

“…High-Mach-number collisionless shocks are found in planetary systems and supernova remnants (SNRs). Electrons are heated at these shocks to temperatures well…”
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A critical Mach number for electron injection in collisionless shocks by Amano, Takanobu, Hoshino, Masahiro

“…Electron acceleration in collisionless shocks with arbitrary magnetic field orientations is discussed. It is shown that the injection of thermal electrons into…”
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THE ROLE OF SUPERLUMINAL ELECTROMAGNETIC WAVES IN PULSAR WIND TERMINATION SHOCKS by Amano, Takanobu, Kirk, John G

“…The dynamics of a standing shock front in a Poynting-flux-dominated relativistic flow is investigated by using a one-dimensional, relativistic, two-fluid…”
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Mildly relativistic magnetized shocks in electron–ion plasmas – I. Electromagnetic shock structure by Ligorini, Arianna, Niemiec, Jacek, Kobzar, Oleh, Iwamoto, Masanori, Bohdan, Artem, Pohl, Martin, Matsumoto, Yosuke, Amano, Takanobu, Matsukiyo, Shuichi, Esaki, Yodai, Hoshino, Masahiro

“…ABSTRACT Mildly relativistic shocks in magnetized electron–ion plasmas are investigated with 2D kinetic particle-in-cell simulations of unprecedentedly high…”
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A finite volume formulation of the multi-moment advection scheme for Vlasov simulations of magnetized plasma by Minoshima, Takashi, Matsumoto, Yosuke, Amano, Takanobu

“…We present a finite volume version of the multi-moment advection scheme (Minoshima et al., 2011, 2013). The scheme advances zeroth to second order piecewise…”
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STABILITY OF COSMIC-RAY MODIFIED SHOCKS: TWO-FLUID APPROACH by Saito, Tatsuhiko, Hoshino, Masahiro, Amano, Takanobu

“…The stability of cosmic-ray modified shocks (CRMSs) is studied by means of numerical simulations. Owing to the nonlinear feedback of cosmic-ray (CR)…”
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