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Title: The spectral energy distributions of active galactic nuclei

Abstract

ABSTRACT We present spectral energy distributions (SEDs) of 41 active galactic nuclei, derived from multiwavelength photometry and archival spectroscopy. All of the SEDs span at least 0.09 to 30 $$\mu$$m, but in some instances wavelength coverage extends into the X-ray, far-infrared, and radio. For some active galactic nuclei (AGNs) we have fitted the measured far-infrared photometry with greybody models, while radio flux density measurements have been approximated by power laws or polynomials. We have been able to fill some of the gaps in the spectral coverage using interpolation or extrapolation of simple models. In addition to the 41 individual AGN SEDs, we have produced 72 Seyfert SEDs by mixing SEDs of the central regions of Seyferts with galaxy SEDs. Relative to the literature, our templates have broader wavelength coverage and/or higher spectral resolution. We have tested the utility of our SEDs by using them to generate photometric redshifts for 0 < z ≤ 6.12 AGNs in the Boötes field (selected with X-ray, IR, and optical criteria) and, relative to SEDs from the literature, they produce comparable or better photometric redshifts with reduced flux density residuals.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [3];  [1];  [4];  [5]; ORCiD logo [6];  [7]
  1. School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia
  2. Leiden Observatory, Leiden University, NL-2300 RA Leiden, Netherlands
  3. Department of Physics, Centre for Extragalactic Astronomy, Durham University, South Road, Durham DH1 3LE, UK
  4. Núcleo de Astronomía de la Facultad de Ingeniería, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago 8370191, Chile, Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, China, Chinese Academy of Sciences, South America Center for Astronomy, Camino El Observatorio 1515, Las Condes, Santiago 7591245, Chile
  5. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
  6. MPE, Giessenbachstrasse 1, D-85748 Garching, Germany
  7. Department of Physics, Yale University, PO Box 201820, New Haven, CT 06520-8120, USA, Yale Center for Astronomy and Astrophysics, PO Box 208121, New Haven, CT 06520, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1562152
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 489 Journal Issue: 3; Journal ID: ISSN 0035-8711
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Brown, M. J. I., Duncan, K. J., Landt, H., Kirk, M., Ricci, C., Kamraj, N., Salvato, M., and Ananna, T. The spectral energy distributions of active galactic nuclei. United Kingdom: N. p., 2019. Web. doi:10.1093/mnras/stz2324.
Brown, M. J. I., Duncan, K. J., Landt, H., Kirk, M., Ricci, C., Kamraj, N., Salvato, M., & Ananna, T. The spectral energy distributions of active galactic nuclei. United Kingdom. doi:10.1093/mnras/stz2324.
Brown, M. J. I., Duncan, K. J., Landt, H., Kirk, M., Ricci, C., Kamraj, N., Salvato, M., and Ananna, T. Fri . "The spectral energy distributions of active galactic nuclei". United Kingdom. doi:10.1093/mnras/stz2324.
@article{osti_1562152,
title = {The spectral energy distributions of active galactic nuclei},
author = {Brown, M. J. I. and Duncan, K. J. and Landt, H. and Kirk, M. and Ricci, C. and Kamraj, N. and Salvato, M. and Ananna, T.},
abstractNote = {ABSTRACT We present spectral energy distributions (SEDs) of 41 active galactic nuclei, derived from multiwavelength photometry and archival spectroscopy. All of the SEDs span at least 0.09 to 30 $\mu$m, but in some instances wavelength coverage extends into the X-ray, far-infrared, and radio. For some active galactic nuclei (AGNs) we have fitted the measured far-infrared photometry with greybody models, while radio flux density measurements have been approximated by power laws or polynomials. We have been able to fill some of the gaps in the spectral coverage using interpolation or extrapolation of simple models. In addition to the 41 individual AGN SEDs, we have produced 72 Seyfert SEDs by mixing SEDs of the central regions of Seyferts with galaxy SEDs. Relative to the literature, our templates have broader wavelength coverage and/or higher spectral resolution. We have tested the utility of our SEDs by using them to generate photometric redshifts for 0 < z ≤ 6.12 AGNs in the Boötes field (selected with X-ray, IR, and optical criteria) and, relative to SEDs from the literature, they produce comparable or better photometric redshifts with reduced flux density residuals.},
doi = {10.1093/mnras/stz2324},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 3,
volume = 489,
place = {United Kingdom},
year = {2019},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
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DOI: 10.1093/mnras/stz2324

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