J/ApJS/228/9 Physical parameters of ∼300000 SDSS-DR12 QSOs (Kozlowski, 2017)
Virial black hole mass estimates for 280000 AGNs from the SDSS broadband
photometry and single-epoch spectra.
Kozlowski S.
<Astrophys. J. Suppl. Ser., 228, 9-9 (2017)>
=2017ApJS..228....9K 2017ApJS..228....9K (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Magnitudes, absolute ; Redshifts
Keywords: galaxies: active; quasars: general; techniques: photometric
Abstract:
We use the Sloan Digital Sky Survey (SDSS) Quasar Data Release 12
(DR12Q), containing nearly 300000 active galactic nuclei (AGNs), to
calculate the monochromatic luminosities at 5100, 3000, and 1350Å,
derived from the broadband extinction-corrected SDSS magnitudes. After
matching these sources to their counterparts from the SDSS Quasar Data
Release 7 (DR7Q), we find very high correlations between our
luminosities and DR7Q spectra-based luminosities with minute mean
offsets (∼0.01dex) and dispersions of differences of 0.11, 0.10, and
0.12dex, respectively, across a luminosity range of 2.5dex. We then
estimate the black hole (BH) masses of the AGNs using the broad line
region radius-disk luminosity relations and the FWHM of the MgII and
CIV emission lines, to provide a catalog of 283033 virial BH mass
estimates (132451 for MgII, 213071 for CIV, and 62489 for both) along
with the estimates of the bolometric luminosity and Eddington ratio
for 0.1<z<5.5 and for roughly a quarter of the sky covered by SDSS.
The BH mass estimates from Mg II turned out to be closely matched to
the ones from DR7Q with a dispersion of differences of 0.34dex across
a BH mass range of ∼2dex. We uncovered a bias in the derived CIV FWHMs
from DR12Q as compared to DR7Q, which we correct empirically. The CIV
BH mass estimates should be used with caution because the CIV line is
known to cause problems in the estimation of BH mass from single-epoch
spectra. Finally, after the FWHM correction, the AGN BH mass estimates
from CIV closely match the DR7Q ones (with a dispersion of 0.28dex),
and more importantly the MgII and CIV BH masses agree internally with
a mean offset of 0.07dex and a dispersion of 0.39dex.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 138 297301 Estimates of the monochromatic and bolometric
luminosities, Eddington ratios, and black hole
masses for SDSS DR12Q AGNs
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See also:
VII/270 : SDSS quasar catalog: tenth data release (Paris+, 2014)
J/ApJ/831/7 : SDSS-RM project: peak velocities of QSOs (Shen+, 2016)
J/ApJ/824/130 : SDSS/BOSS/TDSS CIV BAL quasars (Grier+, 2016)
J/ApJS/216/4 : SDSS-RM project: technical overview (Shen+, 2015)
J/ApJS/206/4 : Luminous QSOs SED & bolometric corrections (Krawczyk+, 2013)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/ApJS/194/42 : SDSS-DR3 MgII-based black hole masses (Rafiee+, 2011)
J/ApJ/713/970 : Low-resolution SED templates for AGNs & gal. (Assef+, 2010)
J/ApJ/680/169 : SDSS DR5 virial black hole masses (Shen+, 2008)
J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)
J/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSS SDSS DR12Q (Paris+, 2017A&A...597A..79P 2017A&A...597A..79P)
identifier (HHMMSS.ss+DDMMSS.s; J2000)
20- 29 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000)
31- 40 F10.6 deg DEdeg Declination in decimal degrees (J2000)
42- 46 F5.3 --- z [0.04/6.5] Redshift, visual
(Paris+, 2017A&A...597A..79P 2017A&A...597A..79P)
48- 57 F10.3 mag iMag [-10045/-15] Absolute Magnitude in i-band
(Paris+, 2017A&A...597A..79P 2017A&A...597A..79P)
59- 65 F7.3 [10-7W] L5100 [42/46.2]?=-99.999 log10(Luminosity
at 5100Å); in erg/s
67- 72 F6.3 [10-7W] e_L5100 [0.06/1.3]?=-9.999 Error in L5100
74- 80 F7.3 [10-7W] L3000 [42/47.4]?=-99.999 log10(Luminosity
at 3000Å); in erg/s
82- 87 F6.3 [10-7W] e_L3000 [0.06/1.8]?=-9.999 Error in L3000
89- 95 F7.3 [10-7W] L1350 [41.8/47.7]?=-99.999 log10(Luminosity
at 1350Å); in erg/s
97-102 F6.3 [10-7W] e_L1350 [0.05/1.8]?=-9.999 Error L1350
104-109 F6.3 [Msun] MBHMgII [5.7/11.1]?=-9.999 log10(MBH) from MgII
111-116 F6.3 [Msun] MBHCIV [6.2/11.3]?=-9.999 log10(MBH) from CIV
118-124 F7.3 [10-7W] Lbol [42/48.3]?=-99.999 log10(bolometric L);
in erg/s
126-131 F6.3 [10-7W] e_Lbol [0.05/1.3]?=-9.999 Error in Lbol
133-138 F6.3 [-] nEdd [-3.5/2.5]?=-9.999 log10(Eddington ratio)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 08-Mar-2017