Towards an informed quest for accretion disc winds in quasars: the intriguing case of Ton 28

  title={Towards an informed quest for accretion disc winds in quasars: the intriguing case of Ton 28},
  author={E. Nardini and E. Lusso and S. Bisogni},
  journal={Monthly Notices of the Royal Astronomical Society},
We report on the detection of a blueshifted Fe K absorption feature in two consecutive XMM–Newton  observations of the luminous blue quasar Ton 28, at the 4σ cumulative significance. The rest energy of 9.2 keV implies the presence of an accretion disc wind with bulk outflow velocity of ∼0.28c, while the kinetic power is most likely a few per cent of the quasar luminosity. Remarkably, Ton 28 had been specifically selected as an optimal target to reveal an ultra-fast X-ray wind based on its total… Expand

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