The infrared to X-ray correlation spectra of unobscured type 1 active galactic nuclei

García-Bernete, I.; Ramos Almeida, C.; Landt, H.; Ward, M.J.; Baloković, M.; Acosta-Pulido, J.A.

doi:10.1093/mnras/stx795

The infrared to X-ray correlation spectra of unobscured type 1 active galactic nuclei

García-Bernete, I.; Ramos Almeida, C.; Landt, H.; Ward, M.J.; Baloković, M.; Acosta-Pulido, J.A.

Authors

I. García-Bernete

C. Ramos Almeida

H. Landt

Professor Martin Ward martin.ward@durham.ac.uk
External Examiner (PGR)

M. Baloković

J.A. Acosta-Pulido

Contributors

Dr Hermine Landt-Wilman hermine.landt@durham.ac.uk
Other

Abstract

We use new X-ray data obtained with the Nuclear Spectroscopic Telescope Array (NuSTAR), near-infrared (NIR) fluxes and mid-infrared (MIR) spectra of a sample of 24 unobscured type 1 active galactic nuclei (AGN) to study the correlation between various hard X-ray bands between 3 and 80 keV and the infrared (IR) emission. The IR to X-ray correlation spectrum (IRXCS) shows a maximum at ∼15–20 μm, coincident with the peak of the AGN contribution to the MIR spectra of the majority of the sample. There is also an NIR correlation peak at ∼2 μm, which we associate with the NIR bump observed in some type 1 AGN at ∼1–5 μm and is likely produced by nuclear hot dust emission. The IRXCS shows practically the same behaviour in all the X-ray bands considered, indicating a common origin for all of them. We finally evaluated correlations between the X-ray luminosities and various MIR emission lines. All the lines show a good correlation with the hard X-rays (ρ ≥ 0.7), but we do not find the expected correlation between their ionization potentials and the strength of the IRXCS.

Citation

García-Bernete, I., Ramos Almeida, C., Landt, H., Ward, M., Baloković, M., & Acosta-Pulido, J. (2017). The infrared to X-ray correlation spectra of unobscured type 1 active galactic nuclei. Monthly Notices of the Royal Astronomical Society, 469(1), 110-126. https://doi.org/10.1093/mnras/stx795

Journal Article Type	Article
Acceptance Date	Mar 28, 2017
Online Publication Date	Apr 1, 2017
Publication Date	Jul 21, 2017
Deposit Date	Aug 25, 2017
Publicly Available Date	Aug 25, 2017
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Royal Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	469
Issue	1
Pages	110-126
DOI	https://doi.org/10.1093/mnras/stx795

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This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.