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:
-
[1];
[2];
[6];
- School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia
- Leiden Observatory, Leiden University, NL-2300 RA Leiden, Netherlands
- Department of Physics, Centre for Extragalactic Astronomy, Durham University, South Road, Durham DH1 3LE, UK
- 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
- Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA
- MPE, Giessenbachstrasse 1, D-85748 Garching, Germany
- 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. https://doi.org/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. https://doi.org/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 = {Fri Aug 30 00:00:00 EDT 2019},
month = {Fri Aug 30 00:00:00 EDT 2019}
}
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