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A disc wind interpretation of the strong Fe K$\alpha$ features in 1H 0707-495.

Hagino, K. and Odaka, H. and Done, C. and Tomaru, R. and Watanabe, S. and Takahashi, T. (2016) 'A disc wind interpretation of the strong Fe K$\alpha$ features in 1H 0707-495.', Monthly notices of the Royal Astronomical Society., 461 (1). pp. 3954-3963.


1H 0707−495 is the most convincing example of a supermassive black hole with an X-ray spectrum being dominated by extremely smeared, relativistic reflection, with the additional requirement of strongly supersolar iron abundance. However, here we show that the iron features in its 2–10 keV spectrum are rather similar to the archetypal wind dominated source, PDS 456. We fit all the 2–10 keV spectra from 1H 0707−495 using the same wind model as used for PDS 456, but viewed at higher inclination so that the iron absorption line is broader but not so blueshifted. This gives a good overall fit to the data from 1H 0707−495, and an extrapolation of this model to higher energies also gives a good match to the NuSTAR data. Small remaining residuals indicate that the iron line emission is stronger than in PDS 456. This is consistent with the wider angle wind expected from a continuum-driven wind from the super-Eddington mass accretion rate in 1H 0707−495, and/or the presence of residual reflection from the underlying disc though the presence of the absorption line in the model removes the requirement for highly relativistic smearing, and highly supersolar iron abundance. We suggest that the spectrum of 1H 0707−495 is sculpted more by absorption in a wind than by extreme relativistic effects in strong gravity.

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Publisher statement:This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2016. The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.
Date accepted:30 June 2016
Date deposited:26 July 2017
Date of first online publication:05 July 2016
Date first made open access:26 July 2017

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