Particle acceleration driven by null electromagnetic fields near a Kerr black hole. (arXiv:2011.06799v2 [gr-qc] UPDATED)
<a href="http://arxiv.org/find/gr-qc/1/au:+Kojima_Y/0/1/0/all/0/1">Yasufumi Kojima</a>, <a href="http://arxiv.org/find/gr-qc/1/au:+Kimura_Y/0/1/0/all/0/1">Yuto Kimura</a>
Short timescale variability is often associated with a black hole system. The
consequence of an electromagnetic outflow suddenly generated near a Kerr black
hole is considered assuming that it is described by a solution of a force-free
field with a null electric current. We compute charged particle acceleration
induced by the burst field. The interaction between the particle and the field
is characterized by a large dimensionless number. We show that the particle is
instantaneously accelerated to the relativistic regime by the field with a very
large amplitude. The typical maximum energy attained by a proton for an event
near a super massive black hole is $E_{rm max} sim 100$ TeV, which is enough
observed high-energy flares.
Short timescale variability is often associated with a black hole system. The
consequence of an electromagnetic outflow suddenly generated near a Kerr black
hole is considered assuming that it is described by a solution of a force-free
field with a null electric current. We compute charged particle acceleration
induced by the burst field. The interaction between the particle and the field
is characterized by a large dimensionless number. We show that the particle is
instantaneously accelerated to the relativistic regime by the field with a very
large amplitude. The typical maximum energy attained by a proton for an event
near a super massive black hole is $E_{rm max} sim 100$ TeV, which is enough
observed high-energy flares.
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