4.7 Article

Broadband X-Ray Constraints on the Accreting Black Hole in Quasar 4C 74.26

Journal

ASTROPHYSICAL JOURNAL
Volume 885, Issue 1, Pages -

Publisher

IOP PUBLISHING LTD
DOI: 10.3847/1538-4357/ab4282

Keywords

black hole physics; galaxies: active; galaxies: individual (4C 74; 26); radiation mechanisms: general; scattering

Funding

  1. NASA [80NSSC18K0408, NNH17ZDA001N-ADAP]
  2. National Aeronautics and Space Administration

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X-ray data for quasar 4C 74.26 have previously been modeled with a broad Fe K? emission line and reflection continuum originating in the inner part of the accretion disk around the central supermassive black hole (SMBH), i.e.,the strong-gravity regime. We modeled broadband X-ray spectra from Suzaku and NuSTAR with mytorus, self-consistently accounting for Fe K? line emission, as well as direct and reflected continuum emission, from matter with a finite column density. A narrow Fe K? emission line originating in an X-ray reprocessor with solar Fe abundance far from the central SMBH is sufficient to produce excellent fits for all spectra. For the first time, we are able to measure the global column density, out of the line of sight, to be in the range ?1.5 to ?

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