J/ApJ/961/246 SED analysis of X-ray selected AGN in Stripe 82 (Setoguchi+, 2024)
Multiwavelength spectral energy distribution analysis of X-ray selected active
galactic nuclei at z=0.2-0.8 in the Stripe 82 region.
Setoguchi K., Ueda Y., Toba Y., Li J., Silverman J., Uematsu R.
<Astrophys. J., 961, 246 (2024)>
=2024ApJ...961..246S 2024ApJ...961..246S
ADC_Keywords: Active gal. nuclei; Redshifts; Spectra, optical;
Energy distributions; Black holes; X-ray sources
Keywords: Active galactic nuclei ; Supermassive black holes ; Active galaxies
Abstract:
We perform a systematic, multiwavelength spectral energy distribution
(SED) analysis of X-ray detected active galactic nuclei (AGNs) at
z=0.2-0.8 with Sloan Digital Sky Survey (SDSS) counterparts in the
Stripe 82 region, consisting of 60 type 1 and 137 type 2 AGNs covering
a 2-10keV luminosity range of 41.6<logLx<4.7. The latest CIGALE code,
where dusty polar components are included, is employed. To obtain
reliable host and AGN parameters in type 1 AGNs, we utilize the
image-decomposed optical SEDs of host galaxies by Li et al. based on
the Subaru Hyper-Suprime Cam images. The mean ratio of black hole
masses (MBH) and stellar masses (Mstellar) of our X-ray detected type
1 AGN sample, log(MBH/Mstellar)=-2.7±0.5, is close to the local
relation between BH and stellar masses as reported by Li et al. for
SDSS quasars. This ratio is slightly lower than that found for more
luminous (logLbol>45) type 1 AGNs at z∼1.5. This can be explained by
the AGN luminosity dependence of log(MBH/Mstellar), which little
evolves with redshift. We confirm the trend that the UV-to-X-ray slope
(αOX) or X-ray-to-bolometric correction factor (κ2-10)
increases with AGN luminosity or Eddington ratio. We find that type 1
and type 2 AGNs with the same luminosity ranges share similar host
stellar mass distributions, whereas type 2s tend to show smaller AGN
luminosities than type 1s. This supports the luminosity-dependent (or
Eddington-ratio-dependent) unified scheme.
Description:
Li+ (2021ApJ...918...22L 2021ApJ...918...22L) cataloged 371 optical type 1 AGNs at
z=0.2-0.8 within the Stripe 82X region. Among them, we selected
111 objects detected with XMM-Newton and/or Chandra that have SDSS
Data Release 14 (DR14) spectroscopic redshifts and multiwavelength
counterparts in Ananna+ (2017, J/ApJ/850/66) and
LaMassa+ (2016, J/ApJ/817/172).
Finally, 66 objects whose fluxes are decomposed in all grizy bands
were chosen.
We also selected 158 X-ray selected, optical type 2 AGNs at z=0.2-0.8
from the Stripe 82X catalog (LaMassa+ 2016, , J/ApJ/817/172 and
Ananna+ 2017, J/ApJ/850/66).
See Section 2.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 71 60 Summary of properties of X-ray detected type-1 AGNs
and hosts
table5.dat 48 137 Summary of properties of X-ray detected type-2 AGNs
and hosts
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See also:
B/xmm : XMM-Newton Obs. Log (XMM-Newton Science Operation Center, 2012-)
B/chandra : The Chandra Archive Log (CXC, 1999-2014)
II/367 : The VISTA Hemisphere Survey (VHS) catalog DR5 (McMahon+, 2020)
VII/286 : SDSS quasar catalog, fourteenth data release (Paris+, 2018)
VII/289 : SDSS quasar catalog, sixteenth data release (DR16Q) (Lyke+, 2020)
J/AJ/127/3075 : MIR population of ELAIS-S1 sample (La Franca+, 2004)
J/AJ/130/387 : SDSS-ROSAT AGN data (Strateva+, 2005)
J/A+A/474/473 : XMM-LSS survey: AGN classifications (Garcet+, 2007)
J/ApJS/179/124 : Subaru/XMM-Newton deep survey (SXDS) III. (Ueda+, 2008)
J/ApJ/690/1236 : COSMOS photometric redshift catalog (Ilbert+, 2009)
J/A+A/512/A34 : XMM-COSMOS Type 1 AGNs (Lusso+, 2010)
J/ApJ/708/137 : Broad-line AGNs in zCOSMOS survey (Merloni+, 2010)
J/PASJ/65/113 : 0.006≤z≤0.8 IR galaxies with AKARI (Toba+, 2013)
J/ApJ/796/60 : ECDFS galaxies phot. redshifts & counterparts (Hsu+, 2014)
J/ApJ/788/45 : Luminosity and redshift of gal. from WISE/SDSS (Toba+, 2014)
J/ApJS/210/22 : Herschel Stripe 82 survey (HerS) first cat. (Viero+, 2014)
J/ApJ/811/91 : SDSS-RM project: z<1 QSO host galaxies (Matsuoka+, 2015)
J/ApJ/813/82 : z<0.06 broad-line AGN emission-line measures (Reines+, 2015)
J/MNRAS/456/1359 : IAC Stripe 82 Legacy Project: Photometry (Fliri+, 2016)
J/ApJ/817/172 : X-ray Observations of Stripe 82 (LaMassa+, 2016)
J/ApJS/225/1 : SpIES: the Spitzer IRAC Equatorial Survey (Timlin+, 2016)
J/ApJ/850/66 : Stripe 82X survey multiwavelength catalog (Ananna+, 2017)
J/ApJ/850/74 : Swift/BAT AGN Spectroscopic Survey. I. (Koss+, 2017)
J/A+A/619/A95 : X-ray/UV ratio of AGN (Chiaraluce+, 2018)
J/ApJ/861/37 : WISE-selected QSOs in SDSS Stripe 82 (Glikman+, 2018)
J/ApJ/876/50 : X-ray & IR AGNs in Stripe 82 with eBOSS sp. (LaMassa+, 2019)
J/ApJ/878/11 : Type 1 vs 2 X-ray-selected COSMOS AGNs (Zou+, 2019)
J/ApJS/249/17 : SDSS QSO DR14 spectral properties (Rakshit+, 2020)
J/ApJ/912/91 : A value-added cat. for SDSS DR16 QSOs at z<0.7 (Toba+, 2021)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSS Unique identifier in SDSS DR14Q catalog
(HHMMSS.ss+DDMMSS.s; J2000)
20- 38 A19 --- SpecObjID Unique spectrum identifier in SDSS DR14
40- 44 F5.3 --- z [0.24/0.8] Redshift from the SDSS spectra
46- 50 F5.2 [10-7W] logLbol [43.39/45.74] Logarithmic bolometric AGN
luminosity (G1)
52- 55 F4.2 [Msun] logMBH [6.9/9.3] Logarithmic black hole mass
57- 60 F4.2 [Msun] e_logMBH [0.05/1.11] The 1 sigma uncertainty in
logMBH
62- 66 F5.2 [Msun] logMs [9.96/11.4] Logarithmic stellar mass
68- 71 F4.2 [Msun] e_logMs [0.16/0.3] The 1 sigma uncertainty in
logMs
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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- 5 A5 --- ID Unique identifier in Stripe 82X catalog (1)
7- 25 A19 --- SpecObjID Unique spectrum identifier in SDSS DR14
27- 31 F5.3 --- z [0.2/0.8] Redshift from SDSS spectra
33- 37 F5.2 [10-7W] logLbol [43.31/45.75] Logarithmic bolometric AGN
luminosity (G1)
39- 43 F5.2 [Msun] logMs [9.45/11.13] Logarithmic stellar mass
45- 48 F4.2 [Msun] e_logMs [0.02/0.3] The 1 sigma uncertainty in
logMs
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Note (1): IDs are from Ananna+ 2017, J/ApJ/850/66
except for 3459 which is 135301 in Ananna+ 2017, J/ApJ/850/66; note
added by CDS.
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Note (G1): Derived by CIGALE, for which we adopt the output
parameter "agn.accretion power". In units of erg/s.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Apr-2026