J/ApJ/761/184 IR luminosities for dusty AGNs and QSOs (Weedman+, 2012)
Infrared classification and luminosities for dusty active galactic nuclei and
the most luminous quasars.
Weedman D., Sargsyan L., Lebouteiller V., Houck J., Barry D.
<Astrophys. J., 761, 184 (2012)>
=2012ApJ...761..184W 2012ApJ...761..184W
ADC_Keywords: Active gal. nuclei ; Spectra, infrared ; X-ray sources ; QSOs ;
Redshifts ; Equivalent widths
Keywords: galaxies: active; galaxies: distances and redshifts;
galaxies: evolution; galaxies: starburst; infrared: galaxies;
quasars: general
Abstract:
Mid-infrared spectroscopic measurements from the Infrared Spectrometer
(IRS) on Spitzer are given for 125 hard X-ray active galactic nuclei
(AGNs; 14-195keV) from the Swift Burst Alert Telescope (BAT) sample
and for 32 AGNs with black hole masses (BHMs) from reverberation
mapping. The 9.7µm silicate feature in emission or absorption
defines an infrared AGN classification describing whether AGNs are
observed through dust clouds, indicating that 55% of the BAT AGNs are
observed through dust. The 100 most luminous type 1 quasars as
measured in νLν(7.8µm) are found by comparing Sloan Digital
Sky Survey (SDSS) optically discovered quasars with photometry at
22µm from the Wide-Field Infrared Survey Explorer (WISE), scaled to
rest frame 7.8µm using an empirical template determined from IRS
spectra. The most luminous SDSS/WISE quasars have the same maximum
infrared luminosities for all 1.5<z<5, reaching total infrared
luminosity LIR=1014.4L☉. Comparing with dust-obscured
galaxies from Spitzer and WISE surveys, we find no evidence of
hyperluminous obscured quasars whose maximum infrared luminosities
exceed the maximum infrared luminosities of optically discovered
quasars. Bolometric luminosities Lbol estimated from rest-frame
optical or ultraviolet luminosities are compared to LIR. For the
local AGN, the median logLIR/Lbol=-0.35, consistent with a
covering factor of 45% for the absorbing dust clouds. For the
SDSS/WISE quasars, the median logLIR/Lbol=0.1, with extremes
indicating that ultraviolet-derived Lbol can be seriously
underestimated even for type 1 quasars.
Description:
In the present paper, we describe and calibrate an infrared AGN
classification, measure infrared luminosities, and compare to virial
black hole masses (Mbh) and optically derived bolometric luminosities
by analyzing Spitzer/IRS CASSIS spectra for three AGNs samples.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 88 125 Observed properties of BAT AGNs
table2.dat 83 35 Observed properties of AGNs with black hole masses
table3.dat 73 100 Infrared luminosities for most luminous SDSS quasars
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See also:
VII/270 : SDSS quasar catalog: tenth data release (Paris+, 2014)
II/311 : WISE All-Sky Data Release (Cutri+ 2012)
VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)
VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)
J/AJ/146/100 : New 2.2<z<3.5 quasars from SDSS and UKIDSS (Wu+, 2013)
J/ApJ/755/171 : [CII]158um line fluxes of AGN from Herschel (Sargsyan+, 2012)
J/ApJ/754/45 : IR properties of Swift/BAT X-ray AGNs (Ichikawa+, 2012)
J/ApJ/753/125 : NIR spectroscopy follow-up of 60 SDSS-DR7 QSOs (Shen+, 2012)
J/ApJ/753/104 : AGN identifications from AKARI and Swift (Matsuta+, 2012)
J/AJ/144/49 : Quasars from SDSS-DR7, WISE and UKIDSS surveys (Wu+, 2012)
J/AJ/141/105 : NIR-matched quasar catalog (Peth+, 2011)
J/MNRAS/414/500 : Spitzer/IRS ATLAS project source (Hernan-Caballero+, 2011)
J/ApJ/730/19 : IR spectra and SEDs for starbursts and AGNs (Sargsyan+, 2011)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/ApJS/186/378 : Hard X-ray survey from Swift-BAT 2004-2006 (Tueller+, 2010)
J/ApJ/698/1682 : Most luminous dusty galaxies (Weedman+, 2009)
J/ApJ/697/182 : Dust emission from unobscured AGN (Thompson+, 2009)
J/ApJ/660/167 : Spitzer AGN candidates in CDFN (Donley+, 2007)
J/ApJ/658/778 : Spitzer mid-IR spectroscopy of z∼2 ULIRGs (Yan+, 2007)
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/640/579 : Near-infrared spectra of 27 SDSS quasars (Glikman+, 2006)
J/ApJ/613/682 : AGN masses & broad-line region sizes (Peterson+, 2004)
http://heasarc.gsfc.nasa.gov/W3Browse/all/spitzmastr.html : Spitzer Space
Telescope Observation log
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/125] Running sequence number
5- 19 A15 --- Name BAT name (1)
21- 28 I8 --- AOR1 AOR number of first Spitzer IRS spectrum
29 A1 --- --- [,]
31- 38 I8 --- AOR2 ? AOR number of second Spitzer IRS spectra
40- 44 F5.2 aW/cm2 FX [1.7/93] Hard X-ray flux (14-195keV) from
Tueller et al. (2010, Cat. J/ApJS/186/378);
in units of 10-11erg/s/cm2=10-14W/m2
46- 50 F5.2 [10-7W] LX [40.8/46.8] Log of hard X-ray luminosity
from Tueller+ (J/ApJS/186/378), in log(erg/s)
52 A1 --- l_F[NeIII] Limit flag on F[NeIII]
54- 59 F6.2 zW/cm2 F[NeIII] ? Total flux of [NeIII] 15.55um emission-line
fit (2)
61 A1 --- l_F[OIV] Limit flag on F[OIV]
63- 68 F6.2 zW/cm2 F[OIV] [0.2/295]? Total flux of [OIV] 25.89um (3)
70 A1 --- l_EW Limit flag on EW
72- 76 F5.3 um EW [0.007/0.5]? Rest-frame equivalent width of
6.2um PAH feature (G1)
78- 83 F6.1 mJy F7.8 [3.7/7850] Flux density Fν(7.8um) (G2)
85- 88 F4.2 --- Si [0.1/1.5]? Strength of silicate feature (4)
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Note (1): Source name as listed in BAT catalog (Tueller et al. 2010,
J/ApJS/186/378) where coordinates are also given, listed in order
of R.A. This list includes all objects listed with "Sy" or "quasar"
classification in BAT catalog ("Type" in their Table 5) that also have
low-resolution IRS spectra; objects listed as "blazar" are not included.
Note (2): Total flux of [NeIII]15.55um emission-line fit with single
Gaussian in low-resolution CASSIS spectra in units of 10-21W/cm2
(10-14erg/s/cm2)
Note (3): Total flux of [OIV] 25.89um emission-line fit with single
Gaussian in low-resolution CASSIS spectra in units of 10-21W/cm2.
Note (4): Strength of silicate feature defined as
fν(10um.observed)/fν(10um.continuum), for
fν(10um.continuum) extrapolated linearly between fν(7.8um)
and fν(13um). Values >1 correspond to silicate emission and
values <1 to silicate absorption. No silicate strength is given for
sources with EW(6.2um)>0.05um because of possible contamination of the
extrapolated continuum at 7.8um by PAH 7.7um emission.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Seq [1/35] Running sequence number
4- 14 A11 --- Name AGN name (1)
16- 21 A6 --- OName Other name
23- 40 A18 --- AOR AOR number(s) for Spitzer IRS spectra
available in CASSIS
42- 47 F6.4 --- z [0.002/0.3]? Redshift
49 A1 --- l_EW Limit flag on EW
51- 54 F4.2 um EW [0.01/0.2]? Rest-frame equivalent width of
6.2um PAH feature (G1)
56- 60 F5.1 mJy F7.8 [14.9/970]? Flux density F_ν(7.8um) (G2)
62- 66 F5.2 [10-7W] L7.8 [42.3/45.8]? Rest-frame luminosity
νLν(7.8um) in erg/s (G3)
68- 72 F5.2 [Lsun] LIR [9.2/12.7]? Total infrared luminosity (G4)
74- 78 F5.2 [Lsun] Lbol [9.2/13.4] Bolometric luminosity (2)
80- 83 F4.2 [Msun] Mbh [6.2/9.2]? Virial black hole mass (3)
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Note (1): Source name as listed in Peterson et al. (2004, J/ApJ/613/682),
listed in order of R.A. Many of these sources are also in the BAT
sample of Table 1.
Note (2): Optically determined bolometric luminosity Lbol from
λLλ(0.51um) of the AGN component in Bentz et al.
(2009ApJ...697..160B 2009ApJ...697..160B), assuming a scaling of
Lbol=9.26λLλ(0.51um) from Richards et al. (2006,
J/ApJS/166/470).
Note (3): Virial black hole mass from Peterson et al. (2004, J/ApJ/613/682).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/100] Running sequence number
5- 8 A4 --- --- [SDSS]
10- 27 A18 --- SDSS SDSS name (HHMMSS.ss+DDMMSS.s; J2000)
29 A1 --- f_SDSS Gravitationally lensed source (1)
31- 35 F5.3 --- z [1.5/4.8] Optical redshift from SDSS-DR7
(Cat. VII/260)
37- 42 F6.2 mJy F22 [4.4/228] Observed WISE all-sky 22um flux
density (Cat. II/311) (2)
44- 49 F6.2 mJy F7.8 [6.9/224] Flux density F_ν(7.8um) (3)
51- 55 F5.2 [10-7W] L7.8 [46.9/47.8] Rest-frame luminosity
νLν(7.8um) in erg/s (G3)
57- 61 F5.2 [Lsun] LIR [13.8/14.7] Total infrared luminosity (G4)
63- 67 F5.2 [Lsun] Lbol [12.2/14.7] Bolometric luminosity (4)
69- 73 F5.2 [Msun] Mbh [8/10.8]? Virial black hole mass (5)
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Note (1):
h = Gravitationally lensed source from Inada et al. (2010AJ....140..403I 2010AJ....140..403I)
and references therein.
Note (2): Observed flux density at 22um from the WISE All Sky Catalog
available at http://wise2.ipac.caltech.edu/docs/release/allsky/.
Zero point of 22um magnitude listed in catalog taken as 8284mJy;
typical uncertainties for sources with fluxes listed are ±15%.
Note (3): Flux density fν(7.8um) at observed wavelength corresponding
to rest wavelength 7.8um, determined by scaling fν (observed
22um) to fν(rest frame 7.8um) using tabulated redshift and
template spectrum shown in Figure 6.
Note (4): Bolometric luminosity Lbol from Shen et al. (2011, Cat.
J/ApJS/194/45), adopting a scaling of Lbol=5.15νLν(0.30um)
for z<1.9 and Lbol=3.81νLν(0.135um) for z>1.9.
Note (5): Virial black hole mass from width of CIV line estimated by Shen
et al. (2011, Cat. J/ApJS/194/45).
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Global notes:
Note (G1): Rest-frame equivalent width of 6.2um PAH feature fit with single
Gaussian on a linear continuum within rest-wavelength range 5.5-6.9um.
Note (G2): Flux density fν(7.8µm) from IRS low-resolution spectra at
observed wavelength corresponding to rest wavelength 7.8um.
Note (G3): Rest-frame luminosity νLν(7.8um) determined as
νLν(7.8um)=4πD2L[ν/(1+z)]fν(7.8um), for ν
corresponding to 7.8um, taking luminosity distances from Wright,
2006PASP..118.1711W 2006PASP..118.1711W: http://www.astro.ucla.edu/wright/CosmoCalc.html,
for H0=74km/s/Mpc, ΩM=0.27, and ΩΛ=0.73.
Note (G4): Total infrared luminosity LIR determined using calibration from
Sargsyan et al. 2011 (J/ApJ/730/19): log[LIR/νLν(7.8um)]=0.51
(L☉=1033.59erg/s).
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 25-Aug-2014