J/ApJ/824/70 UV-FIR SED results of SDSS QSOs and their hosts (Dong+, 2016)
Herschel observed stripe 82 quasars and their host galaxies: connections
between AGN activity and host galaxy star formation.
Dong X.Y., Wu X.-B.
<Astrophys. J., 824, 70-70 (2016)>
=2016ApJ...824...70D 2016ApJ...824...70D (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; QSOs ; Redshifts ; Surveys ; Infrared sources
Keywords: galaxies: active; galaxies: evolution; galaxies: starburst;
galaxies: star formation; quasars: general; techniques: photometric
Abstract:
In this work, we present a study of 207 quasars selected from the
Sloan Digital Sky Survey quasar catalogs and the Herschel Stripe 82
survey. Quasars within this sample are high-luminosity quasars with a
mean bolometric luminosity of 1046.4erg/s. The redshift range of
this sample is within z Herschel-SPIRE bands, the quasar sample is
complete yet highly biased. Based on the multi-wavelength photometric
observation data, we conducted a spectral energy distribution (SED)
fitting through UV to FIR. Parameters such as active galactic nucleus
(AGN) luminosity, far-IR (FIR) luminosity, stellar mass, as well as
many other AGN and galaxy properties are deduced from the SED fitting
results. The mean star formation rate (SFR) of the sample is
419M☉/yr and the mean gas mass is ∼1011.3M☉. All of
these results point to an IR luminous quasar system. Compared with
star formation main sequence (MS) galaxies, at least 80 out of 207
quasars are hosted by starburst galaxies. This supports the statement
that luminous AGNs are more likely to be associated with major
mergers. The SFR increases with the redshift up to z=2. It is
correlated with the AGN bolometric luminosity, where
LFIR∝LBol0.46±0.03. The AGN bolometric luminosity is
also correlated with the host galaxy mass and gas mass. Yet the
correlation between LFIR and LBol has higher significant level,
implies that the link between AGN accretion and the SFR is more
primal. The MBH/M* ratio of our sample is 0.02, higher than the
value 0.005 in the local universe. It might indicate an evolutionary
trend of the MBH/M* scaling relation.
Description:
SDSS Stripe 82 covers approximately 270deg2 area on the celestial
equator in the south Galactic cap, spanning from 20h to 4h in RA and
-1.25°∼1.25° in DEC. It has been repeatedly imaged by SDSS
between 1998 and 2007. Besides the optical imaging survey and the
spectroscopic survey, SDSS Stripe 82 has also been observed
extensively by other surveys from X-ray through UV/optical to IR and
radio bandpasses.
Among these surveys, HerS (Viero+, 2014, J/ApJS/210/22), an imaging
survey conducted by SPIRE on board the Herschel Space Observatory,
covers about 79deg2 in area to an average depth of 13.0, 12.9, and
14.8mJy/beam (including a confusion limit of 7mJy) at 250, 350, and
500um, respectively.
The quasar sample is selected by cross-identifying the HerS catalog
with the Shen et al. (2011, J/ApJS/194/45) quasar catalog, the
compiled catalog based on the spectroscopic quasar catalog (Schneider
et al. 2010, VII/260) from SDSS Data Release 7 (Abazajian et al. 2009,
II/294); and the SDSS quasar catalog from the tenth data release
(Paris et al. 2014, VII/270). The search radius is 5 arcsec.
See section 2 for further details.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 198 207 The SED fitting results
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See also:
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
VII/270 : SDSS quasar catalog: tenth data release (Paris+, 2014)
VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/ApJ/811/58 : FIR properties of SDSS 0.1<z<5 quasars (Ma+, 2015)
J/ApJS/219/18 : LIRAS: LoCuSS IR AGN survey (Xu+, 2015)
J/ApJS/210/22 : Herschel Stripe 82 survey (HerS) first catalog (Viero+, 2014)
J/MNRAS/434/3104 : QSOs SED shapes from optical to NIR (Hao+, 2013)
J/A+A/533/A119 : GOODS-Herschel North and South catalogs (Elbaz+, 2011)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/ApJ/708/137 : Broad-line AGNs in zCOSMOS survey (Merloni+, 2010)
J/ApJ/699/800 : Mass functions of active black holes (Vestergaard+, 2009)
J/ApJ/690/20 : Models of the AGN and black hole populations (Shankar+, 2009)
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/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)
J/ApJS/95/1 : Atlas of Quasar Energy Distributions (Elvis+ 1994)
http://www.sdss.org/ : SDSS home page
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 Running sequence number
5- 22 A18 --- SDSS Quasar designation
(hhmmss.ss+ddmmss.s; J2000)
24- 32 F9.6 deg RAdeg Right ascension in decimal degrees (J2000),
from HerS catalog
34- 45 F12.9 deg DEdeg Declination in decimal degrees (J2000),
from HerS catalog
47- 52 F6.4 --- z [0.1/4.1] Redshift, from the SDSS DR7,DR10
54- 56 F3.1 --- fg Host galaxy fraction at 1um
58- 61 F4.2 --- e_fg Uncertainty in fg
63- 65 F3.1 mag Aint [0/0.5] The internal reddening Aint
67- 70 F4.2 mag e_Aint [0/0.3] Uncertainty in Aint
72- 75 A4 --- Morph Host galaxy morphological type;
"E" (49 sources) or "Sb" (44 sources)
77- 78 I2 K Tcold [15/50] FIR cold dust temperature Tcold
80- 83 F4.1 K e_Tcold [0.6/17] Uncertainty in Tcold
85- 89 F5.2 --- alpha [-1/1.5] AGN power-law index at UV/optical,
α
91- 94 F4.2 --- e_alpha [0/0.5] Uncertainty in alpha
96- 99 F4.1 [10-7W] LFIR [10.9/13.1] FIR luminosity integrated
from 8um to 1000um Log(LFIR), erg/s
101-104 F4.2 [10-7W] e_LFIR [0.03/1.2] Uncertainty in Log(LFIR)
106-109 F4.1 [10-7W] LBol [44.5/48.4] Bolometric luminosity Log(LBol),
in erg/s units
111-114 F4.2 [10-7W] e_LBol [0/1.1] Uncertainty in Log(LBol)
116-118 F3.1 [Msun/yr] SFR [1.1/3.3] SFR Log(SFR)
120-123 F4.2 [Msun/yr] e_SFR [0.03/1.2] Uncertainty in Log(SFR)
125-128 F4.1 [10-7W] L1300 [43.9/48] Monochromatic luminosity
at 1300Å, Log(L1300), erg/s
130-133 F4.2 [10-7W] e_L1300 [0/1.3] Uncertainty in Log(L1300)
135-138 F4.1 [10-7W] L3000 [43.7/47.4] Monochromatic luminosity
at 3000Å, Log(L3000), erg/s
140-143 F4.2 [10-7W] e_L3000 [0/1.3] Uncertainty in Log(L3000)
145-148 F4.1 [10-7W] L5100 [43.6/47.2] Monochromatic luminosity
at 5100Å, Log(L5100), erg/s
150-153 F4.2 [10-7W] e_L5100 [0/1.3] Uncertainty in Log(L5100)
155-158 F4.1 [10-7W] L250um [43.1/45.7] Monochromatic luminosity
at 250um, Log(L250um), erg/s
160-163 F4.2 [10-7W] e_L250um [0.02/1.7] Uncertainty in Log(L250um)
165-168 F4.1 [Msun] MBH [0/11] Black hole mass, Log(MBH)
170-173 F4.2 [Msun] e_MBH [0/1.1] Uncertainty in Log(MBH)
175-178 F4.1 [Msun] Mgas [9.8/12.4] Gas mass, Log(Mgas)
180-183 F4.2 [Msun] e_Mgas [0.03/1.2] Uncertainty in Log(Mgas)
185-188 F4.1 [Msun] Mstar [0/12.1] Host galaxy mass, Log(Mstar)
190-193 F4.2 [Msun] e_Mstar [0/0.4] Uncertainty in Log(Mstar)
195-198 A4 --- Cat SDSS quasar catalog ("DR7" or "DR10")
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 16-Aug-2016