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