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.
C. Ramos Almeida
Professor Martin Ward firstname.lastname@example.org
External Examiner (PGR)
Dr Hermine Landt-Wilman email@example.com
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.
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|
|Publisher||Royal Astronomical Society|
|Peer Reviewed||Peer Reviewed|
Published Journal Article
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.
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