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Related papers: On the intrinsic AGN emission in far-infrared/sub-…

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It is widely assumed that long-wavelength infrared (IR) emission from cold dust (T~20-40K) is a reliable tracer of star formation even in the presence of a bright active galactic nucleus (AGN). Based on radiative transfer (RT) models of…

Forward modeling of the full galaxy SED is a powerful technique, providing self-consistent constraints on stellar ages, dust properties, and metallicities. However, the accuracy of these results is contingent on the accuracy of the model.…

Astrophysics of Galaxies · Physics 2018-02-28 Joel Leja , Benjamin D. Johnson , Charlie Conroy , Pieter van Dokkum

The emission of warm dust dominates the mid-infrared spectra of active galactic nuclei (AGN). Only interferometric observations provide the necessary angular resolution to resolve the nuclear dust and to study its distribution and…

We examine the near-infrared (NIR) emission from low-luminosity AGNs (LLAGNs). Our galaxy sample includes 15 objects with detected 2-10 keV X-ray emission, dynamical black hole mass estimates from the literature, and available Gemini/NIFS…

Astrophysics of Galaxies · Physics 2020-01-15 Antoine Dumont , Anil Seth , Jay Strader , Jenny E. Greene , Leonard Burtscher , Nadine Neumayer

The combination of the AKARI and WISE infrared all-sky surveys provides an unique opportunity to identify and characterize the most highly dust obscured AGNs in the universe. Dust-obscured AGNs are not easily detectable and potentially…

Astrophysics of Galaxies · Physics 2018-08-06 Anson Lam , Matthew A. Malkan , Edward L. Wright

Spectral Energy Distribution (SED) fitting in the far-infrared (FIR) is greatly limited by a dearth of data and an excess of free parameters - from galaxies' dust composition, temperature, mass, orientation, opacity, to heating from AGN.…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 Caitlin M. Casey

We perform spectral energy distribution (SED) fitting to 711 luminous X-ray AGN at 0.7 < z < 4.5 using 10-bands of optical and infra-red photometric data for objects within XMM-SERVS. This fitting provided 510 reliable (reduced $\chi ^2 <…

Astrophysics of Galaxies · Physics 2022-07-27 Adam Marshall , Matthew W. Auger-Williams , Manda Banerji , Roberto Maiolino , Rebecca Bowler

This proceeding discusses the potential modifications to the mid-infrared spectral energy distribution (SED) of a high-redshift dusty AGN that is graviationally lensed by a foreground galaxy. The mid-infrared colour of a lensed galaxy would…

Astrophysics · Physics 2009-10-31 Andrew W. Blain

UV-FIR SED modeling is an effective way to disentangle emission between star formation (SF) and active galactic nuclei (AGN) in galaxies; however, this approach becomes uncertain for composite AGN/SF galaxies that comprise 50-70% of…

Astrophysics of Galaxies · Physics 2023-03-08 Alyssa D. Sokol , M. Yun , A. Pope , A. Kirkpatrick , K. Cooke

We present a new analysis of the PG quasar sample based on Spitzer and Herschel observations. (I) Assuming PAH-based star formation luminosities (L_SF) similar to Symeonidis et al. (2016, S16), we find mean and median intrinsic AGN spectral…

Astrophysics of Galaxies · Physics 2017-08-02 Caterina Lani , Hagai Netzer , Dieter Lutz

The origin of the far-infrared emission from the nearby radio galaxy M87 remains a matter of debate. Some studies find evidence of a far-infrared excess due to thermal dust emission, whereas others propose that the far-infrared emission can…

Genuine spectral energy distributions (SEDs) of the central few parsec of the nearest and brightest active galaxies in the Southern Hemisphere are presented. They are compiled from very high spatial resolution observations in the radio…

We create broadband SEDs of 761 type 1 AGN. The Scott et al. sample, created by a cross-correlation of the optical SDSS DR5 quasar catalogue and the 2XMMi catalogue of serendipitous X-ray sources, is further matched with the FIRST catalogue…

High Energy Astrophysical Phenomena · Physics 2015-06-18 A. E. Scott , G. C. Stewart

We evaluate the underlying assumptions for the identification of Active Galactic Nuclei (AGNs) through near- and mid-infrared photometry and spectral energy distribution (SED) fitting out to z ~ 3. For massive galaxies, log(M) > 9.5, our…

Dust reprocesses the intrinsic radiation of active galactic nuclei (AGNs) to emerge at longer wavelengths. The observed mid-infrared (MIR) luminosity depends fundamentally on the luminosity of the central engine, but in detail it also…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 N. A. Levenson , J. T. Radomski , C. Packham , R. E. Mason , J. J. Schaefer , C. M. Telesco

We present Spitzer photometric data for a complete sample of 19 low redshift (z<0.1) 3CRR radio galaxies as part of our efforts to understand the origin of the prodigious mid- to far-infrared (MFIR) emission from radio-loud AGN. Our results…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 D. Dicken , C. Tadhunter , D. Axon , A. Robinson , R. Morganti , P. Kharb

We present deep {\it Spitzer} mid-infrared spectroscopy, along with 16, 24, 70, and 850\,$\micron$\ photometry, for 22 galaxies located in the Great Observatories Origins Deep Survey-North (GOODS-N) field. The sample spans a redshift range…

Cosmology and Nongalactic Astrophysics · Physics 2010-05-06 E. J. Murphy , R. R. Chary , D. M. Alexander , M. Dickinson , B. Magnelli , G. Morrison , A. Pope , H. I. Teplitz

We present the broad-band Spectral Energy Distributions (SEDs) of the largest available highly (72%) complete spectroscopic sample of mid-infrared (MIR) selected galaxies and AGN at intermediate redshift. The sample contains 203…

We combine two approaches to isolate the AGN luminosity at near-infrared wavelengths and relate the near-IR pure AGN luminosity to other tracers of the AGN. Using integral-field spectroscopic data of an archival sample of 51 local AGNs, we…

Spectral energy distributions (SEDs) of the central few tens of parsec region of some of the nearest, most well studied, active galactic nuclei (AGN) are presented. These genuine AGN-core SEDs, mostly from Seyfert galaxies, are…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 M. A. Prieto , J. Reunanen , K. R. W. Tristram , N. Neumayer , J. A. Fernandez-Ontiveros , M. Orienti , K. Meisenheimer