Duncan Farrah
The geometry of the infrared and X-ray obscurer in a dusty hyperluminous quasar
Farrah, Duncan; Baloković, Mislav; Stern, Daniel; Harris, Kathryn; Kunimoto, Michelle; Walton, Dominic J.; Alexander, David M.; Arévalo, Patricia; Ballantyne, David R.; Bauer, Franz E.; Boggs, Steven; Brandt, William N.; Brightman, Murray; Christensen, Finn; Clements, David L.; Craig, William; Fabian, Andrew; Hailey, Charles; Harrison, Fiona; Koss, Michael; Lansbury, George B.; Luo, Bin; Paine, Jennie; Petty, Sara; Pitchford, Kate; Ricci, Claudio; Zhang, William
Authors
Mislav Baloković
Daniel Stern
Kathryn Harris
Michelle Kunimoto
Dominic J. Walton
Professor David Alexander d.m.alexander@durham.ac.uk
Professor
Patricia Arévalo
David R. Ballantyne
Franz E. Bauer
Steven Boggs
William N. Brandt
Murray Brightman
Finn Christensen
David L. Clements
William Craig
Andrew Fabian
Charles Hailey
Fiona Harrison
Michael Koss
George B. Lansbury
Bin Luo
Jennie Paine
Sara Petty
Kate Pitchford
Claudio Ricci
William Zhang
Abstract
We study the geometry of the active galactic nucleus (AGN) obscurer in IRAS 09104+4109, an IR-luminous, radio-intermediate FR-I source at z = 0.442, using infrared data from Spitzer and Herschel, X-ray data from NuSTAR, Swift, Suzaku, and Chandra, and an optical spectrum from Palomar. The infrared data imply a total rest-frame 1–1000 μm luminosity of 5.5 × 1046 erg s−1 and require both an AGN torus and a starburst model. The AGN torus has an anisotropy-corrected IR luminosity of 4.9 × 1046 erg s−1 and a viewing angle and half-opening angle both of approximately 36° from pole-on. The starburst has a star formation rate of (110 ± 34) M ⊙ yr−1 and an age of <50 Myr. These results are consistent with two epochs of luminous activity in IRAS 09104+4109: one approximately 150 Myr ago, and one ongoing. The X-ray data suggest a photon index of Γ sime 1.8 and a line-of-sight column density of N H sime 5 × 1023 cm−2. This argues against a reflection-dominated hard X-ray spectrum, which would have implied a much higher N H and luminosity. The X-ray and infrared data are consistent with a bolometric AGN luminosity of L bol ~ (0.5–2.5) × 1047 erg s−1. The X-ray and infrared data are further consistent with coaligned AGN obscurers in which the line of sight "skims" the torus. This is also consistent with the optical spectra, which show both coronal iron lines and broad lines in polarized but not direct light. Combining constraints from the X-ray, optical, and infrared data suggest that the AGN obscurer is within a vertical height of 20 pc, and a radius of 125 pc, of the nucleus.
Citation
Farrah, D., Baloković, M., Stern, D., Harris, K., Kunimoto, M., Walton, D. J., …Zhang, W. (2016). The geometry of the infrared and X-ray obscurer in a dusty hyperluminous quasar. Astrophysical Journal, 831(1), Article 76. https://doi.org/10.3847/0004-637x/831/1/76
Journal Article Type | Article |
---|---|
Acceptance Date | Jun 14, 2016 |
Online Publication Date | Oct 27, 2016 |
Publication Date | Nov 1, 2016 |
Deposit Date | Jun 21, 2017 |
Publicly Available Date | Mar 29, 2024 |
Journal | Astrophysical Journal |
Print ISSN | 0004-637X |
Electronic ISSN | 1538-4357 |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 831 |
Issue | 1 |
Article Number | 76 |
DOI | https://doi.org/10.3847/0004-637x/831/1/76 |
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Copyright Statement
© 2016. The American Astronomical Society. All rights reserved.
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