Physics of Pair Producing Gaps in Black Hole Magnetospheres
May 28, 20186 pages
Published in:
- Astrophys.J.Lett. 863 (2018) 2, L31
- Published: Aug 17, 2018
e-Print:
- 1805.11039 [astro-ph.HE]
View in:
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Abstract: (IOP)
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 e ± 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 e ± 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 r g /c, 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.Note:
- 3 figures, submitted to ApJL
- acceleration of particles
- black hole physics
- plasmas
- radiation mechanisms: non-thermal
- relativistic processes
References(25)
Figures(3)
- [1]
- [2]
- [3]
- [4]
- [5]
- [6]
- [7]
- [7]
- [8]
- [9]
- [10]
- [11]
- [12]
- [13]
- [14]
- [15]
- [16]
- [17]
- [18]
- [19]
- [20]
- [21]
- [22]
- [23]
- [24]