説明
<jats:title>Abstract</jats:title> <jats:p>In some low-luminosity accreting supermassive black hole systems, the supply of plasma in the funnel region can be a problem. It is believed that a local region with an unscreened electric field can exist in the black hole magnetosphere, accelerating particles and producing high-energy gamma-rays that can create <jats:italic>e</jats:italic> <jats:sup>±</jats:sup> pairs. We carry out time-dependent self-consistent 1D PIC simulations of this process, including inverse-Compton scattering and photon tracking. We find a highly time-dependent solution where a macroscopic gap opens quasi-periodically to create <jats:italic>e</jats:italic> <jats:sup>±</jats:sup> pairs and high-energy radiation. If this gap is operating at the base of the jet in M87, we expect an intermittency on the order of a few <jats:italic>r</jats:italic> <jats:sub> <jats:italic>g</jats:italic> </jats:sub>/<jats:italic>c</jats:italic>, which coincides with the timescale of the observed TeV flares from the same object. For Sagittarius A* the gap electric field can potentially grow to change the global magnetospheric structure, which may explain the lack of a radio jet at the center of our galaxy.</jats:p>
収録刊行物
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- The Astrophysical Journal Letters
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The Astrophysical Journal Letters 863 (2), L31-, 2018-08-17
American Astronomical Society
