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R. Sivron (Bucknell University), A.K. Woodson (Truman State University)
There is growing evidence for non-linearity in light curves from AGN central engines. We present a model which produces non-linearity by introducing perturbations into the spherical accretion flow onto a black hole.
The non-linearity arises because each flare influences the efficiency with which subsequent flares can be produced. Flares are produced when a strong perturbation gives rise to efficient emission from a spherical shell with high energy density. The next few perturbations may then raise the energy density of the shell until another strong perturbation drains the reservoir. In addition, the energy density of a shell is dependent on its radial location; radiation from inner shells may be absorbed by outer shells.
We show that our model produces non-linear light curves that resemble existing AGN light curves.
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