Supermassive Black Holes in Elliptical Galaxies: Switching from Very Bright to Very Dim

  title={Supermassive Black Holes in Elliptical Galaxies: Switching from Very Bright to Very Dim},
  author={E.Churazov and S.Sazonov and R.Sunyaev and W.Forman and C.Jones and H.Boehringer},
Relativistic outflows (mainly observed in the radio) are a characteristic feature of both Galactic stellar mass black holes and supermassive black holes (SMBHs). Simultaneous radio and X-ray observations of Galactic sources have shown that the outflow is strong at low accretion rates, but it weakens dramatically or disappears completely at high accretion rates, manifesting structural changes in the accretion flow. It is reasonable to assume that SMBHs follow the same trend. For low luminosity… 
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