J/ApJ/841/76 Intrinsic far-IR SED of luminous AGNs (Lyu+, 2017)
The intrinsic far-infrared continua of type-1 quasars.
Lyu J., Rieke G.H.
<Astrophys. J., 841, 76 (2017)>
=2017ApJ...841...76L 2017ApJ...841...76L
ADC_Keywords: Active gal. nuclei ; QSOs ; Infrared sources ; Redshifts ;
Energy distributions ; Models
Keywords: galaxies: active ; infrared: galaxies ; quasars: general
Abstract:
The range of currently proposed active galactic nucleus (AGN)
far-infrared templates results in uncertainties in retrieving host
galaxy information from infrared observations and also undermines
constraints on the outer part of the AGN torus. We discuss how to test
and reconcile these templates. Physically, the fraction of the
intrinsic AGN IR-processed luminosity compared with that from the
central engine should be consistent with the dust-covering factor. In
addition, besides reproducing the composite spectral energy
distributions (SEDs) of quasars, a correct AGN IR template combined
with an accurate library of star-forming galaxy templates should be
able to reproduce the IR properties of the host galaxies, such as the
luminosity-dependent SED shapes and aromatic feature strengths. We
develop tests based on these expected behaviors and find that the
shape of the AGN intrinsic far-IR emission drops off rapidly starting
at ∼20µm and can be matched by an Elvis+ (1994, J/ApJS/95/1)-like
template with a minor modification. Despite the variations in the
near- to mid-IR bands, AGNs in quasars and Seyfert galaxies have
remarkably similar intrinsic far-IR SEDs at λ∼20-100µm,
suggesting a similar emission character of the outermost region of the
circumnuclear torus. The variations of the intrinsic AGN IR SEDs among
the type-1 quasar population can be explained by the changing relative
strengths of four major dust components with similar characteristic
temperatures, and there is evidence for compact AGN-heated dusty
structures at sub-kiloparsec scales in the far-IR.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 64 24 Host galaxy IR properties of the 24 Palomar-Green
quasars
table4.dat 32 399 AGN intrinsic templates
table5.dat 41 101 Properties of 101 SFGs in the GOALS sample
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See also:
J/ApJS/95/1 : Atlas of Quasar Energy Distributions (Elvis+ 1994)
J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)
J/ApJ/653/127 : 9.7um silicate features in AGNs (Shi+, 2006)
J/ApJ/666/806 : SED of Spitzer quasars (QUEST) (Netzer+, 2007)
J/ApJ/663/81 : SED of hard X-ray selected AGN in XMDS (Polletta+, 2007)
J/ApJ/656/770 : Mid-IR spectrum of star-forming galaxies (Smith+, 2007)
J/AJ/136/2373 : Type 2 quasars from SDSS (Reyes+, 2008)
J/ApJ/705/14 : Seyfert galaxies in the mid-IR (Deo+, 2009)
J/ApJ/692/556 : Star forming galaxy templates (Rieke+, 2009)
J/ApJ/714/1256 : Far-IR star formation rate indicators (Calzetti+, 2010)
J/MNRAS/414/500 : Spitzer/IRS ATLAS project source (Hernan-Caballero+, 2011)
J/ApJ/759/139 : Herschel+MIPS photom. of GOODS sources (Kirkpatrick+, 2012)
J/ApJ/768/13 : FIR properties of SDSS type 1 quasars (Hanish+, 2013)
J/ApJS/206/1 : Mid-IR properties of GOALS nearby LIRGs (Stierwalt+, 2013)
J/MNRAS/439/1648 : Subarcsecond mid-infrared atlas of local AGN (Asmus+, 2014)
J/A+A/565/A128 : Dust SED in HRS nearby galaxies (Ciesla+, 2014)
J/ApJ/788/159 : 17 Seyfert 1 galaxies light curves (Koshida+, 2014)
J/ApJS/214/23 : IR spectra and photometry of z<0.5 quasars (Shi+, 2014)
J/ApJS/219/18 : LIRAS: LoCuSS IR AGN survey (Xu+, 2015)
J/ApJ/824/70 : UV-FIR SED results of SDSS QSOs & their hosts (Dong+, 2016)
J/MNRAS/458/4512 : Nearby Seyferts FIR emissions (Garcia-Gonzalez+, 2016)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID [4/81] Object ID (1)
5- 15 A11 --- Name Object name
17- 20 F4.2 --- z [0.03/0.4] Redshift
22- 22 A1 --- l_FPAH-spec Upper limit flag on FPAH
23- 26 F4.2 10-13mW/m2 FPAH-spec [0.02/4.6] Flux, 11.3um aromatic feature,
Shi+ (2014 J/ApJS/214/23);
28- 31 F4.2 10-13mW/m2 e_FPAH-spec ? Uncertainty in FPAH-spec
33- 37 F5.2 [Lsun] LR09-PAH [9.7/13] IR luminosity, best-matched
Rieke+ (2009, J/ApJ/692/556) template (2)
39- 42 F4.2 --- cR09-PAH [0.2/1.4] Scaling factor, best-matched
Rieke+ (2009, J/ApJ/692/556) template (2)
44- 47 F4.2 --- fIR-AGN AGN fractional contribution to the IR
emission of each quasar
49- 52 F4.2 10-13mW/m2 FPAH-SED [0.1/9] Flux, 11.3um aromatic feature (3)
54- 58 F5.2 [Lsun] LR09-SED [9.7/12] Log IR luminosity, best-fitted
Rieke+ (2009, J/ApJ/692/556) template (3)
60- 64 F5.2 [Lsun] Lhost-SED [10.1/12.3] Log host galaxy
observed IR luminosity (3)
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Note (1): See Table 2 in Lyu+ (2017ApJ...835..257L 2017ApJ...835..257L) for the list of
the whole Palomar-Green sample.
Note (2): Luminosities and ratio calculated from the best-matched Rieke+
(2009, J/ApJ/692/556) template based on the 11.3um aromatic
feature luminosity.
Note (3): Flux and luminosity values calculated from SED modeling.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 5 F5.2 [um] lambda [-1/3] Wavelength, logarithm
7- 11 F5.2 [Hz] nu [11.5/15.5] Frequency, logarithm
13- 18 F6.3 --- LogLNorm [-5.1/0.7] Log intrinsic AGN luminosity,
normal quasars (1)
20- 25 F6.3 --- LogLHDD [-5/0.7] Log intrinsic AGN luminosity,
hot-dust-deficient quasars (1)
27- 32 F6.3 --- LogLWDD [-4.9/0.7] Log intrinsic AGN luminosity,
warm-dust-deficient quasars (1)
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Note (1): The luminosities are normalized at 1.25 microns. For all the
templates at lambda >100um, a modified black-body with temperature at
118K and dust emissivity 1.5 is scaled to match the observed SED. The
0.1-1.25um SEDs of the HDD and WDD templates are assumed to be the
same as Elvis et al. (1994, J/ApJS/95/1).
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Name Object Name
18- 23 F6.4 --- zNED Redshift from NED
25- 28 F4.2 [Lsun] LogLPAH 11.3 aromatic emission luminosity, from the
mid-IR spectrum
30- 34 F5.2 [Lsun] LogLIR Total IR luminosity,
from Armus+ (2009PASP..121..559A 2009PASP..121..559A)
36- 41 F6.4 --- fconv Luminosity conversion factor between LogL-PAH
and LogL-IR
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 17-Jan-2018