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The X-Ray Reflection Spectrum of the Radio-Loud Quasar 4C 74.26The relativistic jets created by some active galactic nuclei are important agents of AGN feedback. In spite of this, our understanding of what produces these jets is still incomplete. X-ray observations, which can probe the processes operating in the central regions in the immediate vicinity of the supermassive black hole, the presumed jet launching point, are potentially particularly valuable in illuminating the jet formation process. Here, we present the hard X-ray NuSTAR observations of the radio-loud quasar 4C 74.26 in a joint analysis with quasi-simultaneous, soft X-ray Swift observations. Our spectral analysis reveals a high-energy cutoff of -183+3551 keV and confirms the presence of ionized reflection in the source. From the average spectrum we detect that the accretion disk is mildly recessed, with an inner radius of Rin4180 Rg. However, no significant evolution of the inner radius is seen during the three months covered by our NuSTAR campaign. This lack of variation could mean that the jet formation in this radio-loud quasar differs from what is observed in broad-line radio galaxies.
Document ID
Document Type
Reprint (Version printed in journal)
Lohfink, Ann M.
(Cambridge Univ. Cambridge, United Kingdom)
Fabian, Andrew C.
(Cambridge Univ. Cambridge, United Kingdom)
Ballantyne, David R.
(Georgia Inst. of Tech. Atlanta, GA, United States)
Boggs, S. E.
(California Univ. Berkeley, CA, United States)
Boorman, Peter
(Southampton Univ. United Kingdom)
Christensen, F. E.
(Technical Univ. of Denmark Lyngby, Denmark)
Craig, W. W.
(Lawrence Livermore National Lab. Livermore, CA, United States)
Farrah, Duncan
(Virginia Tech Blacksburg, VA, United States)
Garcia, Javier
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Hailey, C. J.
(Columbia Univ. New York, NY, United States)
Harrison, F. A.
(California Inst. of Tech. Pasadena, CA, United States)
Ricci, Claudio
(Universidad Catolica de Chile Santiago, Chile)
Stern, Daniel
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Zhang, William W.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Date Acquired
July 6, 2017
Publication Date
May 26, 2017
Publication Information
Publication: The Astrophysical Journal
Publisher: The American Astronomical Society
Volume: 841
Issue: 2
ISSN: 2041-8205
e-ISSN: 2041-8213
Subject Category
Report/Patent Number
Distribution Limits
black hole physics – galaxies: active – quasars: individual (4C 74.26) – q

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