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TESTING RELATIVISTIC REFLECTION AND RESOLVING OUTFLOWS IN PG 1211+143 WITH XMM-NEWTON AND NuSTAR

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journal contribution
posted on 30.07.2019, 14:30 by A. P. Lobban, K. Pounds, S. Vaughan, J. N. Reeves
We analyze the broad-band X-ray spectrum (0.3–50 keV) of the luminous Seyfert 1/quasar PG 1211+143—the archetypal source for high-velocity X-ray outflows—using near-simultaneous XMM-Newton and NuSTAR observations. We compare pure relativistic reflection models with a model including the strong imprint of photoionized emission and absorption from a high-velocity wind, finding a spectral fit that extrapolates well over the higher photon energies covered by NuSTAR. Inclusion of the high signal-to-noise ratio XMM-Newton spectrum provides much tighter constraints on the model parameters, with a much harder photon index/lower reflection fraction compared to that from the NuSTAR data alone. We show that pure relativistic reflection models are not able to account for the spectral complexity of PG 1211+143 and that wind absorption models are strongly required to match the data in both the soft X-ray and Fe K spectral regions. In confirming the significance of previously reported ionized absorption features, the new analysis provides a further demonstration of the power of combining the high throughput and resolution of long-look XMM-Newton observations with the unprecedented spectral coverage of NuSTAR.

Funding

This research has made use of the NASA Astronomical Data System (ADS), the NASA Extragalactic Database (NED) and is based on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA, and the NuSTAR mission, a project led by the California Institute of Technology (Caltech), managed by the Jet Propulsion Laboratory (JPL). APL and SV acknowledge support from STFC consolidated grant ST/K001000/1 and JNR acknowledges financial support via NASA grant NNX15AF12G. We thank an anonymous referee for highly constructive comments which helped improve the clarity of the paper. Facilities: XMM-Newton (EPIC), NuSTAR.

History

Citation

The Astrophysical Journal, 2016, 831 (2), pp. 201-201

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

VoR (Version of Record)

Published in

The Astrophysical Journal

Publisher

American Astronomical Society, IOP Publishing

eissn

1538-4357

Acceptance date

05/09/2016

Copyright date

2016

Available date

30/07/2019

Publisher version

https://iopscience.iop.org/article/10.3847/0004-637X/831/2/201

Language

en