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Evidence for a radiatively driven disc-wind in PDS 456?

Evidence for a radiatively driven disc-wind in PDS 456? Thumbnail


Abstract

We present a newly discovered correlation between the wind outflow velocity and the X-ray luminosity in the luminous ($L_{\rm bol}\sim10^{47}\,\rm erg\,s^{-1}$) nearby ($z=0.184$) quasar PDS\,456. All the contemporary XMM-Newton, NuSTAR and Suzaku observations from 2001--2014 were revisited and we find that the centroid energy of the blueshifted Fe\,K absorption profile increases with luminosity. This translates into a correlation between the wind outflow velocity and the hard X-ray luminosity (between 7--30\,keV) where we find that $v_{\rm w}/c \propto L_{7-30}^{\gamma}$ where $\gamma=0.22\pm0.04$. We also show that this is consistent with a wind that is predominately radiatively driven, possibly resulting from the high Eddington ratio of PDS\,456.

Acceptance Date Aug 11, 2017
Publication Date Aug 16, 2017
Publicly Available Date Mar 28, 2024
Journal Monthly Notices of the Royal Astronomical Society: Letters
Publisher Oxford University Press
Pages L15-L19
DOI https://doi.org/10.1093/mnrasl/slx129
Keywords black hole physics, galaxies: active, galaxies: nuclei, quasars: individual: (PDS?456), X-rays: galaxies
Publisher URL https://doi.org/10.1093/mnrasl/slx129

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