Disentangling the AGN and Star formation Contributions to the Radio–X-Ray Emission of Radio-loud Quasars at 1 < Z < 2
We constrain the emission mechanisms responsible for the prodigious electromagnetic output generated by active galactic nuclei (AGNs) and their host galaxies with a novel state-of-the-art AGN radio-to-X-ray spectral energy distribution model fitting code (ARXSED). ARXSED combines multiple components...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acbe9c |
| _version_ | 1797695617568342016 |
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| author | Mojegan Azadi Belinda Wilkes Joanna Kuraszkiewicz Jonathan McDowell Ralf Siebenmorgen Matthew Ashby Mark Birkinshaw Diana Worrall Natasha Abrams Peter Barthel Giovanni G. Fazio Martin Haas Sóley Hyman Rafael Martínez-Galarza Eileen T. Meyer |
| author_facet | Mojegan Azadi Belinda Wilkes Joanna Kuraszkiewicz Jonathan McDowell Ralf Siebenmorgen Matthew Ashby Mark Birkinshaw Diana Worrall Natasha Abrams Peter Barthel Giovanni G. Fazio Martin Haas Sóley Hyman Rafael Martínez-Galarza Eileen T. Meyer |
| author_sort | Mojegan Azadi |
| collection | DOAJ |
| description | We constrain the emission mechanisms responsible for the prodigious electromagnetic output generated by active galactic nuclei (AGNs) and their host galaxies with a novel state-of-the-art AGN radio-to-X-ray spectral energy distribution model fitting code (ARXSED). ARXSED combines multiple components to fit the spectral energy distributions (SEDs) of AGNs and their host galaxies. Emission components include radio structures such as lobes and jets, infrared emission from the AGN torus, visible-to-X-ray emission from the accretion disk, and radio-to-ultraviolet emission from the host galaxy. Applying ARXSED to the radio SEDs of 20 3CRR quasars at 1 < z < 2 verifies the need for more than a simple power law when compact radio structures are present. The nonthermal emission contributes 91%–57% of the observed-frame 1.25 mm to 850 μ m flux, and this component must be accounted for when using these wavelengths to estimate star formation properties. We predict the presence of strong radio-linked X-ray emission in more than half the sample sources. ARXSED estimates median (and the associated first and third quartile ranges) BH mass of ${2.9}_{1.7}^{6.0}\times {10}^{9}\,{M}_{\odot }$ , logarithm of Eddington ratio of $-{1.0}_{-1.2}^{-0.6}$ , and spin of ${0.98}_{0.94}^{0.99}$ for our sample. The inferred AGN torus and accretion disk parameters agree with those estimated from spectroscopic analyses of similar samples in the literature. We present the median intrinsic SED of the luminous radio-loud quasars at 1 < z ≲ 2; this SED represents a significant improvement in the way each component is modeled. |
| first_indexed | 2024-03-12T03:14:52Z |
| format | Article |
| id | doaj.art-2c03047c433d4c43a942e05626d1a332 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T03:14:52Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-2c03047c433d4c43a942e05626d1a3322023-09-03T14:11:19ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-01945214510.3847/1538-4357/acbe9cDisentangling the AGN and Star formation Contributions to the Radio–X-Ray Emission of Radio-loud Quasars at 1 < Z < 2Mojegan Azadi0https://orcid.org/0000-0001-6004-9728Belinda Wilkes1https://orcid.org/0000-0003-1809-2364Joanna Kuraszkiewicz2https://orcid.org/0000-0001-5513-029XJonathan McDowell3https://orcid.org/0000-0002-7093-295XRalf Siebenmorgen4https://orcid.org/0000-0002-9788-672XMatthew Ashby5https://orcid.org/0000-0002-3993-0745Mark Birkinshaw6https://orcid.org/0000-0002-1858-277XDiana Worrall7https://orcid.org/0000-0002-1516-0336Natasha Abrams8https://orcid.org/0000-0002-0287-3783Peter Barthel9https://orcid.org/0000-0002-0106-5776Giovanni G. Fazio10Martin Haas11https://orcid.org/0000-0002-7284-0477Sóley Hyman12Rafael Martínez-Galarza13Eileen T. Meyer14https://orcid.org/0000-0002-7676-9962Center for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA, 02138, USA ; mojegan.azadi@cfa.harvard.eduCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA, 02138, USA ; mojegan.azadi@cfa.harvard.eduCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA, 02138, USA ; mojegan.azadi@cfa.harvard.eduCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA, 02138, USA ; mojegan.azadi@cfa.harvard.eduEuropean Southern Observatory , Karl-Schwarzschild-Str. 2, D-85748 Garching b. München, GermanyCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA, 02138, USA ; mojegan.azadi@cfa.harvard.eduH.H. Wills Physics Laboratory, University of Bristol , UKH.H. Wills Physics Laboratory, University of Bristol , UKAstronomy Department, University of California at Berkeley , Berkeley, CA 94720, USAKapteyn Institute, University of Groningen , The NetherlandsCenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA, 02138, USA ; mojegan.azadi@cfa.harvard.eduAstronomisches Institut , Ruhr-University, Bochum, GermanySteward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ, 85721, USACenter for Astrophysics ∣ Harvard & Smithsonian , 60 Garden Street, Cambridge, MA, 02138, USA ; mojegan.azadi@cfa.harvard.eduDepartment of Physics, University of Maryland Baltimore County , Baltimore, MD, 21250, USAWe constrain the emission mechanisms responsible for the prodigious electromagnetic output generated by active galactic nuclei (AGNs) and their host galaxies with a novel state-of-the-art AGN radio-to-X-ray spectral energy distribution model fitting code (ARXSED). ARXSED combines multiple components to fit the spectral energy distributions (SEDs) of AGNs and their host galaxies. Emission components include radio structures such as lobes and jets, infrared emission from the AGN torus, visible-to-X-ray emission from the accretion disk, and radio-to-ultraviolet emission from the host galaxy. Applying ARXSED to the radio SEDs of 20 3CRR quasars at 1 < z < 2 verifies the need for more than a simple power law when compact radio structures are present. The nonthermal emission contributes 91%–57% of the observed-frame 1.25 mm to 850 μ m flux, and this component must be accounted for when using these wavelengths to estimate star formation properties. We predict the presence of strong radio-linked X-ray emission in more than half the sample sources. ARXSED estimates median (and the associated first and third quartile ranges) BH mass of ${2.9}_{1.7}^{6.0}\times {10}^{9}\,{M}_{\odot }$ , logarithm of Eddington ratio of $-{1.0}_{-1.2}^{-0.6}$ , and spin of ${0.98}_{0.94}^{0.99}$ for our sample. The inferred AGN torus and accretion disk parameters agree with those estimated from spectroscopic analyses of similar samples in the literature. We present the median intrinsic SED of the luminous radio-loud quasars at 1 < z ≲ 2; this SED represents a significant improvement in the way each component is modeled.https://doi.org/10.3847/1538-4357/acbe9cRadio galaxiesActive galactic nucleiQuasarsAGN host galaxiesRadio loud quasarsSpectral energy distribution |
| spellingShingle | Mojegan Azadi Belinda Wilkes Joanna Kuraszkiewicz Jonathan McDowell Ralf Siebenmorgen Matthew Ashby Mark Birkinshaw Diana Worrall Natasha Abrams Peter Barthel Giovanni G. Fazio Martin Haas Sóley Hyman Rafael Martínez-Galarza Eileen T. Meyer Disentangling the AGN and Star formation Contributions to the Radio–X-Ray Emission of Radio-loud Quasars at 1 < Z < 2 The Astrophysical Journal Radio galaxies Active galactic nuclei Quasars AGN host galaxies Radio loud quasars Spectral energy distribution |
| title | Disentangling the AGN and Star formation Contributions to the Radio–X-Ray Emission of Radio-loud Quasars at 1 < Z < 2 |
| title_full | Disentangling the AGN and Star formation Contributions to the Radio–X-Ray Emission of Radio-loud Quasars at 1 < Z < 2 |
| title_fullStr | Disentangling the AGN and Star formation Contributions to the Radio–X-Ray Emission of Radio-loud Quasars at 1 < Z < 2 |
| title_full_unstemmed | Disentangling the AGN and Star formation Contributions to the Radio–X-Ray Emission of Radio-loud Quasars at 1 < Z < 2 |
| title_short | Disentangling the AGN and Star formation Contributions to the Radio–X-Ray Emission of Radio-loud Quasars at 1 < Z < 2 |
| title_sort | disentangling the agn and star formation contributions to the radio x ray emission of radio loud quasars at 1 z 2 |
| topic | Radio galaxies Active galactic nuclei Quasars AGN host galaxies Radio loud quasars Spectral energy distribution |
| url | https://doi.org/10.3847/1538-4357/acbe9c |
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