García-Bernete, I. and Ramos Almeida, C. and Landt, H. and Ward, M. J. and Baloković, M. and Acosta-Pulido, J. A. (2017) 'The infrared to X-ray correlation spectra of unobscured type 1 active galactic nuclei.', Monthly notices of the Royal Astronomical Society., 469 (1). pp. 110-126.
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.
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|Publisher Web site:||https://doi.org/10.1093/mnras/stx795|
|Publisher statement:||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.|
|Date accepted:||28 March 2017|
|Date deposited:||25 August 2017|
|Date of first online publication:||01 April 2017|
|Date first made open access:||25 August 2017|
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